diff --git a/Makefile b/Makefile
index 83a3ee9..5924ace 100755
--- a/Makefile
+++ b/Makefile
@@ -11,7 +11,7 @@ include Makefile.cfg
 #---
 
 # Modules
-modules-gint	= bopti clock core display events gray keyboard mmu rtc \
+modules-gint	= bopti clock core display events gray init keyboard mmu rtc \
 		  screen tales timer
 modules-libc	= ctype setjmp stdio stdlib string time
 
@@ -19,7 +19,6 @@ modules-libc	= ctype setjmp stdio stdlib string time
 target-lib	= libgint.a
 target-std	= libc.a
 target-g1a	= gintdemo.g1a
-target-dbg	= gintdbg.g1a
 
 # Tools
 cc		= sh3eb-elf-gcc
@@ -44,17 +43,6 @@ demo-ldflags	= $(demo-cflags) -T demo/gintdemo.ld -L. -lgint -lc -lgcc
 demo-cflags	= -m3 -mb -nostdlib -I include -ffreestanding -std=c11 -Os \
 		  -Wall -Wextra
 
-# Debugger application (displays past diagnostics without running gint)
-debug-src	= $(notdir $(wildcard debug/*.[cs]))
-debug-dep	= $(wildcard debug/*.h)
-debug-icon	= debug/icon.bmp
-debug-obj	= $(debug-src:%=build/debug_%.o)
-debug-elf	= build/gintdbg.elf
-debug-bin	= build/gintdbg.bin
-debug-ldflags	= $(debug-cflags) -T debug/addin.ld -L debug -lfx -lgcc
-debug-cflags	= -m3 -mb -nostdlib -ffreestanding -I debug/include -I \
-		  include -std=c11 -Os -Wall -Wextra
-
 # Specific objects
 obj-lib-spec	= build/display_font_system.bmp.o
 obj-std-spec	=
@@ -159,7 +147,7 @@ debug-ldflags	+= -Wl,--defsym,_GINT_VERSION=$(version_symbol)
 
 all-lib: $(config) $(target-std) $(target-lib)
 
-all: $(config) $(target-std) $(target-lib) $(target-g1a) $(target-dbg)
+all: $(config) $(target-std) $(target-lib) $(target-g1a)
 
 build:
 	$(if $(VERBOSE),,@ printf '\e[35;1mdir \u00bb\e[0m mkdir $@\n')
@@ -196,17 +184,6 @@ $(target-g1a): $(config) $(target-std) $(target-lib) $(demo-obj)
 	@ printf $$(stat -c %s $@)
 	@ printf ' bytes)\n\n'
 
-$(target-dbg): $(config) $(debug-obj)
-	$(if $(VERBOSE),,@ printf '\e[35;1mexe \u00bb\e[0m ld -o $(debug-elf)\n')
-	$(if $(VERBOSE),,@) $(cc) -o $(debug-elf) $(debug-obj) $(debug-ldflags)
-	$(if $(VERBOSE),,@ printf '\e[35;1mexe \u00bb\e[0m objcopy -o $(debug-bin)\n')
-	$(if $(VERBOSE),,@) $(ob) -R .comment -R .bss -O binary $(debug-elf) $(debug-bin)
-	$(if $(VERBOSE),,@ printf '\e[35;1mexe \u00bb\e[0m g1a-wrapper -o $@\n')
-	$(if $(VERBOSE),,@) $(wr) $(debug-bin) -o $@ -i $(debug-icon)
-	@ printf '\e[32;1mmsg \u00bb\e[0m Succesfully built debug application ('
-	@ printf $$(stat -c %s $@)
-	@ printf ' bytes)\n\n'
-
 # Automated rules
 
 $(foreach mod,$(modules), \
@@ -244,16 +221,6 @@ build/demo_%.bmp.o: demo/resources/%.bmp
 	$(if $(VERBOSE),,@ printf '\e[36;1mres \u00bb\e[0m fxconv $<\n')
 	$(if $(VERBOSE),,@) fxconv $< -o $@ -n $(patsubst demo/resources/%.bmp,res_%,$<)
 
-# Debug application
-
-build/debug_%.s.o: debug/%.s $(config)
-	$(if $(VERBOSE),,@ printf '\e[34;1msrc \u00bb\e[0m as $<\n')
-	$(if $(VERBOSE),,@) $(as) -c $< -o $@
-
-build/debug_%.c.o: debug/%.c $(hdr-dep) $(debug-dep) $(config)
-	$(if $(VERBOSE),,@ printf '\e[34;1msrc \u00bb\e[0m cc $<\n')
-	$(if $(VERBOSE),,@) $(cc) -c $< -o $@ $(debug-cflags)
-
 
 
 #---
@@ -282,9 +249,7 @@ endif
 
 install-demo: all
 	p7 send -f $(target-g1a)
-install-debug: all
-	p7 send -f $(target-dbg)
 
 .PHONY: all-lib all help
 .PHONY: clean mrproper distclean
-.PHONY: install install-demo install-debug
+.PHONY: install install-demo
diff --git a/TODO b/TODO
index dca8224..7a2c0ff 100644
--- a/TODO
+++ b/TODO
@@ -1,10 +1,11 @@
 Bugs to fix:
--  A few key hits ignored after leaving the application  (could not reproduce)
--  Lost keyboard control at startup                      (could not reproduce)
 -  Alignment of ALL .data / .rodata files is required to ensure converted data
    is properly aligned
+-  Unpreditcable crap happens when more than 10 keys are pressed simultaneously
+-  Ensure heap data is freed when a task-switch results in leaving the app
 
 Things to do before 1.0:
+-  init:	Move qdiv10() somewhere else
 -  bopti:	Test partial transparency
 -  demo:	Try 284x124 at (-60, -28) (all disadvantages)
 -  project:	Check size of *all* library structures
@@ -33,8 +34,15 @@ Things to do later:
 -  usb:		Implement a driver
 
 Things to investigate:
--  Packed bit fields alignment
 -  Registers that may need to be saved within setjmp()
 -  Optimizing core/gint.c leads to raising of an illegal slot exception when
    running the interrupt handler, although it ends on rte; lds.l @r15+, mach,
    which is totally not an illegal slot.
+
+Possibly useful modules:
+-  DMAC
+-  SCIF, SCIFA
+-  TPU
+-  USB
+-  CMT on SH7305, WDT on SH7705
+-  ACD (SH7705 only)
diff --git a/configure b/configure
index 5ff00f3..83c842f 100755
--- a/configure
+++ b/configure
@@ -7,9 +7,10 @@
 declare -A conf
 
 # Behavior
-conf[GINT_DIAGNOSTICS]=
+conf[GINT_STARTUP_LOG]=
 conf[GINT_NO_SYSCALLS]=
 conf[GINT_EXTENDED_LIBC]=
+conf[GINT_STATIC_GRAY]=
 
 # Size limits
 conf[ATEXIT_MAX]=16
@@ -37,15 +38,18 @@ help()
 Configuration script for the gint library.
 
 Options that affect the behavior of the library:
-  $Cr--diagnostics $Cg[default:$Cp false$Cg]$C0
-    Use gint in debug mode, where the library outputs some diagnostics in
-    memory or briefly on screen to diagnose incompatibilites or crashes.
+  $Cr--startup-log $Cg[default:$Cp false$Cg]$C0
+    Enable a on-screen log at startup if a key is kept pressed while launching
+    the add-in, allowing easy debug and crash diagnoses.
   $Cr--no-syscalls $Cg[default:$Cp false$Cg]$C0
-    Never use syscalls. Expect some trouble with the malloc() function... do
+    Never use syscalls. Expect trouble with malloc() and the gray engine. Do
     not trigger this switch unless you know what you are doing.
   $Cr--extended-libc $Cg[default:$Cp false$Cg]$C0
     Enable specific C99 headers/features that are normally not required by
     calculator programs. This may allow porting programs from other platforms.
+  $Cr--static-gray-engine $Cg[default:$Cp false$Cg]$C0
+    Place the gray engine vram in static ram instead of using the heap. Always
+    use this option when using both the gray engine and --no-syscalls.
 
 Options that customize size limits:
   $Cr--atexit-max$C0=$Cy<integer>$Cg [default:$Cp 16$Cg]$C0
@@ -66,9 +70,10 @@ EOF
 fail=false
 for arg; do case "$arg" in
 	-h | --help) help;;
-	--diagnostics)   conf[GINT_DIAGNOSTICS]=true;;
-	--no-syscalls)   conf[GINT_NO_SYSCALLS]=true;;
-	--extended-libc) conf[GINT_EXTENDED_LIBC]=true;;
+	--startup-log)		conf[GINT_STARTUP_LOG]=true;;
+	--no-syscalls)		conf[GINT_NO_SYSCALLS]=true;;
+	--extended-libc)	conf[GINT_EXTENDED_LIBC]=true;;
+	--static-gray-engine)	conf[GINT_STATIC_GRAY]=true;;
 
 	--atexit-max=*)
 		size=${arg#*=}
@@ -103,9 +108,10 @@ esac; done
 
 output_config_gcc()
 {
-	[ "${conf[GINT_DIAGNOSTICS]}"   != "" ] && echo "-D GINT_DIAGNOSTICS"
+	[ "${conf[GINT_STARTUP_LOG]}"   != "" ] && echo "-D GINT_STARTUP_LOG"
 	[ "${conf[GINT_NO_SYSCALLS]}"   != "" ] && echo "-D GINT_NO_SYSCALLS"
 	[ "${conf[GINT_EXTENDED_LIBC]}" != "" ] && echo "-D GINT_EXTENDED_LIBC"
+	[ "${conf[GINT_STATIC_GRAY]}"   != "" ] && echo "-D GINT_STATIC_GRAY"
 
 	echo "-D ATEXIT_MAX=${conf[ATEXIT_MAX]}"
 	echo "-D TIMER_SLOTS=${conf[TIMER_SLOTS]}"
diff --git a/debug/addin.ld b/debug/addin.ld
deleted file mode 100644
index b712b1d..0000000
--- a/debug/addin.ld
+++ /dev/null
@@ -1,31 +0,0 @@
-OUTPUT_ARCH(sh3)
-ENTRY(initialize)
-MEMORY
-{
-        rom  : o = 0x00300200, l = 512k
-        ram  : o = 0x08100000, l = 64k  /* pretty safe guess */
-}
-SECTIONS
-{
-        .text : {
-                *(.pretext)     /* init stuff */
-                *(.text)
-        } > rom
-        .rodata : {
-                *(.rodata)
-                *(.rodata.str1.4)
-                _romdata = . ;  /* symbol for initialization data */
-        } > rom
-        .bss : {
-                _bbss = . ;
-                _bssdatasize = . ;
-                LONG(0);        /* bssdatasize */
-                *(.bss) *(COMMON);
-                _ebss = . ;
-        } > ram
-        .data : AT(_romdata) {
-                _bdata = . ;
-                *(.data);
-                _edata = . ;
-        } > ram
-}
diff --git a/debug/crt0.s b/debug/crt0.s
deleted file mode 100644
index 93000cf..0000000
--- a/debug/crt0.s
+++ /dev/null
@@ -1,172 +0,0 @@
-        .section .pretext
-        .global initialize
-initialize:
-        sts.l   pr, @-r15
- 
-        ! set up TLB
-        mov.l   Hmem_SetMMU, r3
-        mov.l   address_one, r4 ! 0x8102000
-        mov.l   address_two, r5 ! 0x8801E000
-        jsr     @r3    ! _Hmem_SetMMU
-        mov     #108, r6
- 
-        ! clear the BSS
-        mov.l   bbss, r4   ! start
-        mov.l   ebss, r5   ! end
-        bra     L_check_bss
-        mov     #0, r6
-L_zero_bss:
-        mov.l   r6, @r4        ! zero and advance
-        add     #4, r4
-L_check_bss:
-        cmp/hs  r5, r4
-        bf      L_zero_bss
- 
-        ! Copy the .data
-        mov.l   bdata, r4  ! dest
-        mov.l   edata, r5  ! dest limit
-        mov.l   romdata, r6        ! source
-        bra     L_check_data
-        nop
-L_copy_data:
-        mov.l   @r6+, r3
-        mov.l   r3, @r4
-        add     #4, r4
-L_check_data:
-        cmp/hs  r5, r4
-        bf      L_copy_data
- 
-        mov.l   bbss, r4
-        mov.l   edata, r5
-        sub     r4, r5              ! size of .bss and .data sections
-        add     #4, r5
-        mov.l   bssdatasize, r4
-        mov.l   r5, @r4
- 
-        mov.l   GLibAddinAplExecutionCheck, r2
-        mov     #0, r4
-        mov     #1, r5
-        jsr     @r2    ! _GLibAddinAplExecutionCheck(0,1,1);
-        mov     r5, r6
- 
-        mov.l   CallbackAtQuitMainFunction, r3
-        mov.l   exit_handler, r4
-        jsr     @r3    ! _CallbackAtQuitMainFunction(&exit_handler)
-        nop
-        mov.l   main, r3
-        jmp     @r3    ! _main()
-        lds.l   @r15+, pr
- 
-_exit_handler:
-        mov.l   r14, @-r15
-        mov.l   r13, @-r15
-        mov.l   r12, @-r15
-        sts.l   pr, @-r15
- 
-        mov.l   Bdel_cychdr, r14
-        jsr     @r14 ! _Bdel_cychdr
-        mov     #6, r4
-        jsr     @r14 ! _Bdel_cychdr
-        mov     #7, r4
-        jsr     @r14 ! _Bdel_cychdr
-        mov     #8, r4
-        jsr     @r14 ! _Bdel_cychdr
-        mov     #9, r4
-        jsr     @r14 ! _Bdel_cychdr
-        mov     #10, r4
-        
-        mov.l   BfileFLS_CloseFile, r12
-        mov     #4, r14
-        mov     #0, r13
-L_close_files:
-        jsr     @r12 ! _BfileFLS_CloseFile
-        mov     r13, r4
-        add     #1, r13
-        cmp/ge  r14, r13
-        bf      L_close_files
- 
-        mov.l   flsFindClose, r12
-        mov     #0, r13
-L_close_finds:
-        jsr     @r12 ! _flsFindClose
-        mov     r13, r4
-        add     #1, r13
-        cmp/ge  r14, r13
-        bf      L_close_finds
- 
-        lds.l   @r15+, pr
-        mov.l   @r15+, r12
-        mov.l   @r15+, r13
-        mov.l   Bkey_Set_RepeatTime_Default, r2
-        jmp     @r2    ! _Bkey_Set_RepeatTime_Default
-        mov.l   @r15+, r14
- 
-.align 4
-address_two:    .long 0x8801E000
-address_one:    .long 0x8102000
-Hmem_SetMMU:    .long _Hmem_SetMMU
-GLibAddinAplExecutionCheck:     .long _GLibAddinAplExecutionCheck
-CallbackAtQuitMainFunction:     .long _CallbackAtQuitMainFunction
-Bdel_cychdr:    .long _Bdel_cychdr
-BfileFLS_CloseFile:     .long _BfileFLS_CloseFile
-flsFindClose:   .long _flsFindClose
-Bkey_Set_RepeatTime_Default:    .long _Bkey_Set_RepeatTime_Default
-bbss:      .long _bbss
-ebss:      .long _ebss
-edata:    .long _edata
-bdata:    .long _bdata
-romdata:        .long _romdata
-bssdatasize:    .long _bssdatasize
- 
-exit_handler:   .long _exit_handler
-main:      .long _main
- 
-_Hmem_SetMMU:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x3FA
- 
-_Bdel_cychdr:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x119
- 
-_BfileFLS_CloseFile:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x1E7
- 
-_Bkey_Set_RepeatTime_Default:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x244
- 
-_CallbackAtQuitMainFunction:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x494
- 
-_flsFindClose:
-        mov.l   sc_addr, r2
-        mov.l   1f, r0
-        jmp     @r2
-        nop
-1:      .long 0x218
- 
-_GLibAddinAplExecutionCheck:
-        mov.l   sc_addr, r2
-        mov     #0x13, r0
-        jmp     @r2
-        nop
-sc_addr:        .long 0x80010070
-.end
diff --git a/debug/gintdbg.c b/debug/gintdbg.c
deleted file mode 100644
index 61c70af..0000000
--- a/debug/gintdbg.c
+++ /dev/null
@@ -1,178 +0,0 @@
-//---
-//
-//	gintdbg
-//
-//	A simple debugger for gint applications, providing diagnoses to
-//	determine what went bad.
-//
-//---
-
-// Just for structure definitions, gint does not run here.
-#define	GINT_DIAGNOSTICS
-#include <internals/gint.h>
-#include <mpu.h>
-
-#include <fxlib.h>
-#include <stdarg.h>
-#include <stddef.h>
-
-// Some functions from other files...
-int vsprintf(char *buffer, const char *format, va_list args);
-int sprintf(char *buffer, const char *format, ...);
-
-//---
-//	Some util...
-//---
-
-static int print_row = 1;
-
-void print(int col, const char *format, ...)
-{
-	int row = print_row;
-	print_row++;
-	if(row < 1 || row > 8) return;
-
-	char buffer[256];
-	va_list args;
-	va_start(args, format);
-	vsprintf(buffer, format, args);
-	va_end(args);
-
-	locate(col, row);
-	Print((unsigned char *)buffer);
-}
-
-void newline(void)
-{
-	print_row++;
-}
-
-void nothing_found(void)
-{
-	unsigned int key;
-
-	Bdisp_AllClr_VRAM();
-	PopUpWin(6);
-	print_row = 2;
-	print(3, "Apparently there");
-	print(3, "is no diagnostic.");
-	print(3, "");
-	print(3, "Show anyway?");
-	print(3, "   Yes:[F1]");
-	print(3, "   No :[MENU]");
-
-	do GetKey(&key);
-	while(key != KEY_CTRL_F1);
-}
-
-void show_diagnostics(void)
-{
-	volatile gint_diagnostics_t *dg = gint_diagnostics();
-
-	const char *stages[] = {
-		"Startup", "Sections", "MMU", "Gint", "Clock", "Constructors",
-		"Running", "Leaving", "Destructors", "Terminated",
-	};
-	const char *mpus[] = {
-		"Unknown", "SH7337", "SH7355", "SH7305", "SH7724",
-	};
-
-	print(1, "Gint debugger (%d)", dg->counter);
-	newline();
-
-	print(1, "General information");
-	print(2, "Magic    0x%02x", dg->magic);
-	print(2, "Stage    %s", dg->stage <= 9 ? stages[dg->stage] : "-");
-	if(dg->stage >= stage_gint)
-	{
-		print(2, "MPU      %s", dg->mpu <= 4 ? mpus[dg->mpu] : "-");
-	}
-	print(2, "Version  %08x", dg->version);
-	newline();
-
-	print(1, "Memory map");
-	print(2, "%08x    romdata", dg->romdata);
-	print(2, "%08x        vbr", dg->vbr_address);
-	print(2, "%08x:%05x text", dg->section_text.address,
-		dg->section_text.length);
-	print(2, "%08x:%05x data", dg->section_data.address,
-		dg->section_data.length);
-	print(2, "%08x:%05x  bss", dg->section_bss.address,
-		dg->section_bss.length);
-
-	print(2, "%08x:%05x gint", dg->section_gint.address,
-		dg->section_gint.length);
-	newline();
-
-	print(1, "Exception records");
-	size_t len = sizeof dg->except_vect;
-	char line[19];
-	for(size_t i = 0; i < len; i += 6)
-	{
-		for(size_t n = 0; n < 6 && i + n < len; n++)
-		{
-			size_t index = (dg->excepts + i + n) % len;
-			sprintf(line + 3 * n, " %02x", dg->except_vect[index]);
-		}
-
-		print(1, "%s", line);
-	}
-	print(2, "SPC     %08x", dg->spc);
-	print(2, "SSR     %08x", dg->ssr);
-	print(2, "EXPEVT  %08x", dg->expevt);
-	print(2, "TEA     %08x", dg->tea);
-	newline();
-
-	if(dg->stage >= stage_clock)
-	{
-		print(1, "Clock frequencies");
-		print(2, "Bus clock   %d MHz", dg->Bphi_f);
-		print(2, "Peripheral  %d MHz", dg->Pphi_f);
-		print(2, "Processor   %d MHz", dg->Iphi_f);
-		newline();
-	}
-}
-
-/*
-	main()
-	Let's do this!
-*/
-int main(void)
-{
-	volatile gint_diagnostics_t *dg = gint_diagnostics();
-	unsigned int key;
-
-	if(dg->magic != GINT_DIAGNOSTICS_MAGIC
-		|| dg->stage > 9
-		|| dg->mpu > 4
-	) nothing_found();
-
-	int total_height = -1;
-	int y = 0;
-
-	while(1)
-	{
-		Bdisp_AllClr_VRAM();
-		print_row = 1 - y;
-
-		show_diagnostics();
-		if(total_height < 0) total_height = print_row - 1;
-
-		// Drawing a scrollbar.
-		if(total_height > 8)
-		{
-			int base = (64 * y) / total_height;
-			int height = (64 * 8) / total_height;
-			Bdisp_DrawLineVRAM(127, base, 127, base + height);
-		}
-		Bdisp_PutDisp_DD();
-
-		do GetKey(&key);
-		while(key != KEY_CTRL_UP && key != KEY_CTRL_DOWN);
-
-		if(key == KEY_CTRL_UP && y > 0) y--;
-		else if(key == KEY_CTRL_DOWN && y + 8 < total_height) y++;
-	}
-
-	return 1;
-}
diff --git a/debug/icon.bmp b/debug/icon.bmp
deleted file mode 100644
index 6240f61..0000000
Binary files a/debug/icon.bmp and /dev/null differ
diff --git a/debug/include/dispbios.h b/debug/include/dispbios.h
deleted file mode 100644
index 7b2bdc6..0000000
--- a/debug/include/dispbios.h
+++ /dev/null
@@ -1,97 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : dispbios.h                                      */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __DISPBIOS_H__
-#define __DISPBIOS_H__
-
-
-// Defines
-
-#define IM_VRAM_WIDTH               128
-#define IM_VRAM_HEIGHT              64
-
-#define IM_VRAM_SIZE                1024
-
-#define IM_CHARACTERS_MAX_LINE      21
-#define IM_BYTES_MAX_LINE           (IM_CHARACTERS_MAX_LINE*2)
-
-#define SAVEDISP_PAGE1              1
-#define SAVEDISP_PAGE2              5
-#define SAVEDISP_PAGE3              6
-
-#define MINI_OVER                   0x10
-#define MINI_OR                     0x11
-#define MINI_REV                    0x12
-#define MINI_REVOR                  0x13
-
-#define IM_BIOS_DD_WIDTH            IM_VRAM_WIDTH
-#define IM_BIOS_DD_HEIGHT           IM_VRAM_HEIGHT
-
-#define WRITEKIND                   unsigned char
-#define IMB_WRITEKIND_OVER          0x01
-#define IMB_WRITEKIND_OR            0x02
-#define IMB_WRITEKIND_AND           0x03
-#define IMB_WRITEKIND_XOR           0x04
-
-#define WRITEMODIFY                 unsigned char
-#define IMB_WRITEMODIFY_NORMAL      0x01
-#define IMB_WRITEMODIFY_REVERCE     0x02
-#define IMB_WRITEMODIFY_MESH        0x03
-
-#define AREAKIND                    unsigned char
-#define IMB_AREAKIND_OVER           0x01
-#define IMB_AREAKIND_MESH           0x02
-#define IMB_AREAKIND_CLR            0x03
-#define IMB_AREAKIND_REVERSE        0x04
-
-#define EFFECTWIN                   unsigned char
-#define IMB_EFFECTWIN_OK            0x01
-#define IMB_EFFECTWIN_NG            0x02
-
-
-// Structs
-
-typedef struct tag_DISPBOX{
-    int     left;
-    int     top;
-    int     right;
-    int     bottom;
-} DISPBOX;
-
-typedef struct tag_GRAPHDATA{
-    int             width;
-    int             height;
-    unsigned char   *pBitmap;
-} GRAPHDATA;
-
-typedef struct tag_RECTANGLE{
-    DISPBOX         LineArea;
-    AREAKIND        AreaKind;
-    EFFECTWIN       EffectWin;
-} RECTANGLE;
-
-typedef struct tag_DISPGRAPH{
-    int             x;
-    int             y;
-    GRAPHDATA       GraphData;
-    WRITEMODIFY     WriteModify;
-    WRITEKIND       WriteKind;
-} DISPGRAPH;
-
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/include/endian.h b/debug/include/endian.h
deleted file mode 100644
index 0a4be82..0000000
--- a/debug/include/endian.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : endian.h                                        */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __ENDIAN_H__
-#define __ENDIAN_H__
-
-
-// Macros
-
-#define UtlSwapWord(w)      (unsigned short)((((w) & 0x00ff) << 8) | (((w) & 0xff00) >> 8))
-#define UtlSwapDword(l)     (unsigned long)((((l) & 0x000000ff) << 24) | (((l) & 0x0000ff00) << 8) | (((l) & 0xff000000) >> 24) | (((l) & 0x00ff0000) >> 8))
-#define UtlSwapInteger(i)   UtlSwapDword(i)
-#define UtlSwapPointer(p)   (void*)((((unsigned long)(p) & 0x000000ff) << 24) | (((unsigned long)(p) & 0x0000ff00) << 8) | (((unsigned long)(p) & 0xff000000) >> 24) | (((unsigned long)(p) & 0x00ff0000) >> 8))
-
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/include/filebios.h b/debug/include/filebios.h
deleted file mode 100644
index 276d9ce..0000000
--- a/debug/include/filebios.h
+++ /dev/null
@@ -1,116 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : filebios.h                                      */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __FILEBIOS_H__
-#define __FILEBIOS_H__
-
-
-// Defines
-
-#define FONTCHARACTER               unsigned short
-
-#define _OPENMODE_READ              0x01
-#define _OPENMODE_READ_SHARE        0x80
-#define _OPENMODE_WRITE             0x02
-#define _OPENMODE_READWRITE         0x03
-#define _OPENMODE_READWRITE_SHARE   0x83
-
-#define _CREATEMODE_BINARY          1
-#define _CREATEMODE_DIRECTORY       5
-
-enum DEVICE_TYPE{
-    DEVICE_MAIN_MEMORY,
-    DEVICE_STORAGE,
-    DEVICE_SD_CARD,                 // only fx-9860G SD model
-};
-
-
-// File system standard error code
-#define IML_FILEERR_NOERROR             0
-#define IML_FILEERR_ENTRYNOTFOUND       -1
-#define IML_FILEERR_ILLEGALPARAM        -2
-#define IML_FILEERR_ILLEGALPATH         -3
-#define IML_FILEERR_DEVICEFULL          -4
-#define IML_FILEERR_ILLEGALDEVICE       -5
-#define IML_FILEERR_ILLEGALFILESYS      -6
-#define IML_FILEERR_ILLEGALSYSTEM       -7
-#define IML_FILEERR_ACCESSDENYED        -8
-#define IML_FILEERR_ALREADYLOCKED       -9
-#define IML_FILEERR_ILLEGALTASKID       -10
-#define IML_FILEERR_PERMISSIONERROR     -11
-#define IML_FILEERR_ENTRYFULL           -12
-#define IML_FILEERR_ALREADYEXISTENTRY   -13
-#define IML_FILEERR_READONLYFILE        -14
-#define IML_FILEERR_ILLEGALFILTER       -15
-#define IML_FILEERR_ENUMRATEEND         -16
-#define IML_FILEERR_DEVICECHANGED       -17
-//#define IML_FILEERR_NOTRECORDFILE     -18     // Not used
-#define IML_FILEERR_ILLEGALSEEKPOS      -19
-#define IML_FILEERR_ILLEGALBLOCKFILE    -20
-//#define IML_FILEERR_DEVICENOTEXIST    -21     // Not used
-//#define IML_FILEERR_ENDOFFILE         -22     // Not used
-#define IML_FILEERR_NOTMOUNTDEVICE      -23
-#define IML_FILEERR_NOTUNMOUNTDEVICE    -24
-#define IML_FILEERR_CANNOTLOCKSYSTEM    -25
-#define IML_FILEERR_RECORDNOTFOUND      -26
-//#define IML_FILEERR_NOTDUALRECORDFILE -27     // Not used
-#define IML_FILEERR_NOTALARMSUPPORT     -28
-#define IML_FILEERR_CANNOTADDALARM      -29
-#define IML_FILEERR_FILEFINDUSED        -30
-#define IML_FILEERR_DEVICEERROR         -31
-#define IML_FILEERR_SYSTEMNOTLOCKED     -32
-#define IML_FILEERR_DEVICENOTFOUND      -33
-#define IML_FILEERR_FILETYPEMISMATCH    -34
-#define IML_FILEERR_NOTEMPTY            -35
-#define IML_FILEERR_BROKENSYSTEMDATA    -36
-#define IML_FILEERR_MEDIANOTREADY       -37
-#define IML_FILEERR_TOOMANYALARMITEM    -38
-#define IML_FILEERR_SAMEALARMEXIST      -39
-#define IML_FILEERR_ACCESSSWAPAREA      -40
-#define IML_FILEERR_MULTIMEDIACARD      -41
-#define IML_FILEERR_COPYPROTECTION      -42
-#define IML_FILEERR_ILLEGALFILEDATA     -43
-
-// FILE_INFO.type
-#define DT_DIRECTORY            0x0000      // Directory
-#define DT_FILE                 0x0001      // File
-#define DT_ADDIN_APP            0x0002      // Add-In application
-#define DT_EACT                 0x0003      // eActivity
-#define DT_LANGUAGE             0x0004      // Language
-#define DT_BITMAP               0x0005      // Bitmap
-#define DT_MAINMEM              0x0006      // Main Memory data
-#define DT_TEMP                 0x0007      // Temporary data
-#define DT_DOT                  0x0008      // .  (Current directory)
-#define DT_DOTDOT               0x0009      // .. (Parent directory)
-#define DT_VOLUME               0x000A      // Volume label
-
-
-// Structs
-
-typedef struct tag_FILE_INFO
-{
-    unsigned short  id;
-    unsigned short  type;
-    unsigned long   fsize;                  // File size
-    unsigned long   dsize;                  // Data size
-    unsigned int    property;               // The file has not been completed, except when property is 0.
-    unsigned long   address;
-} FILE_INFO;
-
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/include/fxlib.h b/debug/include/fxlib.h
deleted file mode 100644
index dc4534a..0000000
--- a/debug/include/fxlib.h
+++ /dev/null
@@ -1,100 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : fxlib.h                                         */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __FXLIB_H__
-#define __FXLIB_H__
-
-#include "dispbios.h"
-#include "filebios.h"
-#include "keybios.h"
-
-
-// Prototypes
-
-void Bdisp_AllClr_DD(void);
-void Bdisp_AllClr_VRAM(void);
-void Bdisp_AllClr_DDVRAM(void);
-void Bdisp_AreaClr_DD(const DISPBOX *pArea);
-void Bdisp_AreaClr_VRAM(const DISPBOX *pArea);
-void Bdisp_AreaClr_DDVRAM(const DISPBOX *pArea);
-void Bdisp_AreaReverseVRAM(int x1, int y1, int x2, int y2);
-void Bdisp_GetDisp_DD(unsigned char *pData);
-void Bdisp_GetDisp_VRAM(unsigned char *pData);
-void Bdisp_PutDisp_DD(void);
-void Bdisp_PutDispArea_DD(const DISPBOX *PutDispArea);
-void Bdisp_SetPoint_DD(int x, int y, unsigned char point);
-void Bdisp_SetPoint_VRAM(int x, int y, unsigned char point);
-void Bdisp_SetPoint_DDVRAM(int x, int y, unsigned char point);
-int  Bdisp_GetPoint_VRAM(int x, int y);
-void Bdisp_WriteGraph_DD(const DISPGRAPH *WriteGraph);
-void Bdisp_WriteGraph_VRAM(const DISPGRAPH *WriteGraph);
-void Bdisp_WriteGraph_DDVRAM(const DISPGRAPH *WriteGraph);
-void Bdisp_ReadArea_DD(const DISPBOX *ReadArea, unsigned char *ReadData);
-void Bdisp_ReadArea_VRAM(const DISPBOX *ReadArea, unsigned char *ReadData);
-void Bdisp_DrawLineVRAM(int x1, int y1, int x2, int y2);
-void Bdisp_ClearLineVRAM(int x1, int y1, int x2, int y2);
-
-void locate(int x, int y);
-void Print(const unsigned char *str);
-void PrintRev(const unsigned char *str);
-void PrintC(const unsigned char *c);
-void PrintRevC(const unsigned char *str);
-void PrintLine(const unsigned char *str, int max);
-void PrintRLine(const unsigned char *str, int max);
-void PrintXY(int x, int y, const unsigned char *str, int type);
-int PrintMini(int x, int y, const unsigned char *str, int type);
-void SaveDisp(unsigned char num);
-void RestoreDisp(unsigned char num);
-void PopUpWin(int n);
-
-int Bfile_OpenFile(const FONTCHARACTER *filename, int mode);
-int Bfile_OpenMainMemory(const unsigned char *name);
-int Bfile_ReadFile(int HANDLE, void *buf, int size, int readpos);
-int Bfile_WriteFile(int HANDLE, const void *buf, int size);
-int Bfile_SeekFile(int HANDLE, int pos);
-int Bfile_CloseFile(int HANDLE);
-int Bfile_GetMediaFree(enum DEVICE_TYPE devicetype, int *freebytes);
-int Bfile_GetFileSize(int HANDLE);
-int Bfile_CreateFile(const FONTCHARACTER *filename, int size);
-int Bfile_CreateDirectory(const FONTCHARACTER *pathname);
-int Bfile_CreateMainMemory(const unsigned char *name);
-int Bfile_RenameMainMemory(const unsigned char *oldname, const unsigned char *newname);
-int Bfile_DeleteFile(const FONTCHARACTER *filename);
-int Bfile_DeleteDirectory(const FONTCHARACTER *pathname);
-int Bfile_DeleteMainMemory(const unsigned char *name);
-int Bfile_FindFirst(const FONTCHARACTER *pathname, int *FindHandle, FONTCHARACTER *foundfile, FILE_INFO *fileinfo);
-int Bfile_FindNext(int FindHandle, FONTCHARACTER *foundfile, FILE_INFO *fileinfo);
-int Bfile_FindClose(int FindHandle);
-
-void Bkey_Set_RepeatTime(long FirstCount, long NextCount);
-void Bkey_Get_RepeatTime(long *FirstCount, long *NextCount);
-void Bkey_Set_RepeatTime_Default(void);
-int GetKeyWait(int sel, int time, int menu, unsigned int *keycode);
-int IsKeyDown(int keycode);
-int IsKeyUp(int keycode);
-int GetKey(unsigned int *keycode);
-
-int SetTimer(int ID, int elapse, void (*hander)(void));
-int KillTimer(int ID);
-void Sleep(int millisecond);
-
-void SetQuitHandler(void (*callback)(void));
-int INIT_ADDIN_APPLICATION(int isAppli, unsigned short OptionNum);
-
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/include/keybios.h b/debug/include/keybios.h
deleted file mode 100644
index 848fa5f..0000000
--- a/debug/include/keybios.h
+++ /dev/null
@@ -1,158 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : keybios.h                                       */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __KEYBIOS_H__
-#define __KEYBIOS_H__
-
-
-// Defines
-
-// Character codes
-#define KEY_CHAR_0          0x30
-#define KEY_CHAR_1          0x31
-#define KEY_CHAR_2          0x32
-#define KEY_CHAR_3          0x33
-#define KEY_CHAR_4          0x34
-#define KEY_CHAR_5          0x35
-#define KEY_CHAR_6          0x36
-#define KEY_CHAR_7          0x37
-#define KEY_CHAR_8          0x38
-#define KEY_CHAR_9          0x39
-#define KEY_CHAR_DP         0x2e
-#define KEY_CHAR_EXP        0x0f
-#define KEY_CHAR_PMINUS     0x87
-#define KEY_CHAR_PLUS       0x89
-#define KEY_CHAR_MINUS      0x99
-#define KEY_CHAR_MULT       0xa9
-#define KEY_CHAR_DIV        0xb9
-#define KEY_CHAR_FRAC       0xbb
-#define KEY_CHAR_LPAR       0x28
-#define KEY_CHAR_RPAR       0x29
-#define KEY_CHAR_COMMA      0x2c
-#define KEY_CHAR_STORE      0x0e
-#define KEY_CHAR_LOG        0x95
-#define KEY_CHAR_LN         0x85
-#define KEY_CHAR_SIN        0x81
-#define KEY_CHAR_COS        0x82
-#define KEY_CHAR_TAN        0x83
-#define KEY_CHAR_SQUARE     0x8b
-#define KEY_CHAR_POW        0xa8
-#define KEY_CHAR_IMGNRY     0x7f50
-#define KEY_CHAR_LIST       0x7f51
-#define KEY_CHAR_MAT        0x7f40
-#define KEY_CHAR_EQUAL      0x3d
-#define KEY_CHAR_PI         0xd0
-#define KEY_CHAR_ANS        0xc0
-#define KEY_CHAR_LBRCKT     0x5b
-#define KEY_CHAR_RBRCKT     0x5d
-#define KEY_CHAR_LBRACE     0x7b
-#define KEY_CHAR_RBRACE     0x7d
-#define KEY_CHAR_CR         0x0d
-#define KEY_CHAR_CUBEROOT   0x96
-#define KEY_CHAR_RECIP      0x9b
-#define KEY_CHAR_ANGLE      0x7f54
-#define KEY_CHAR_EXPN10     0xb5
-#define KEY_CHAR_EXPN       0xa5
-#define KEY_CHAR_ASIN       0x91
-#define KEY_CHAR_ACOS       0x92
-#define KEY_CHAR_ATAN       0x93
-#define KEY_CHAR_ROOT       0x86
-#define KEY_CHAR_POWROOT    0xb8
-#define KEY_CHAR_SPACE      0x20
-#define KEY_CHAR_DQUATE     0x22
-#define KEY_CHAR_VALR       0xcd
-#define KEY_CHAR_THETA      0xce
-#define KEY_CHAR_A          0x41
-#define KEY_CHAR_B          0x42
-#define KEY_CHAR_C          0x43
-#define KEY_CHAR_D          0x44
-#define KEY_CHAR_E          0x45
-#define KEY_CHAR_F          0x46
-#define KEY_CHAR_G          0x47
-#define KEY_CHAR_H          0x48
-#define KEY_CHAR_I          0x49
-#define KEY_CHAR_J          0x4a
-#define KEY_CHAR_K          0x4b
-#define KEY_CHAR_L          0x4c
-#define KEY_CHAR_M          0x4d
-#define KEY_CHAR_N          0x4e
-#define KEY_CHAR_O          0x4f
-#define KEY_CHAR_P          0x50
-#define KEY_CHAR_Q          0x51
-#define KEY_CHAR_R          0x52
-#define KEY_CHAR_S          0x53
-#define KEY_CHAR_T          0x54
-#define KEY_CHAR_U          0x55
-#define KEY_CHAR_V          0x56
-#define KEY_CHAR_W          0x57
-#define KEY_CHAR_X          0x58
-#define KEY_CHAR_Y          0x59
-#define KEY_CHAR_Z          0x5a
-
-
-// Control codes
-#define KEY_CTRL_NOP        0
-#define KEY_CTRL_EXE        30004
-#define KEY_CTRL_DEL        30025
-#define KEY_CTRL_AC         30015
-#define KEY_CTRL_FD         30046
-#define KEY_CTRL_XTT        30001
-#define KEY_CTRL_EXIT       30002
-#define KEY_CTRL_SHIFT      30006
-#define KEY_CTRL_ALPHA      30007
-#define KEY_CTRL_OPTN       30008
-#define KEY_CTRL_VARS       30016
-#define KEY_CTRL_UP         30018
-#define KEY_CTRL_DOWN       30023
-#define KEY_CTRL_LEFT       30020
-#define KEY_CTRL_RIGHT      30021
-#define KEY_CTRL_F1         30009
-#define KEY_CTRL_F2         30010
-#define KEY_CTRL_F3         30011
-#define KEY_CTRL_F4         30012
-#define KEY_CTRL_F5         30013
-#define KEY_CTRL_F6         30014
-#define KEY_CTRL_CATALOG    30100
-#define KEY_CTRL_CAPTURE    30055
-#define KEY_CTRL_CLIP       30050
-#define KEY_CTRL_PASTE      30036
-#define KEY_CTRL_INS        30033
-#define KEY_CTRL_MIXEDFRAC  30054
-#define KEY_CTRL_FRACCNVRT  30026
-#define KEY_CTRL_QUIT       30029
-#define KEY_CTRL_PRGM       30028
-#define KEY_CTRL_SETUP      30037
-#define KEY_CTRL_PAGEUP     30052
-#define KEY_CTRL_PAGEDOWN   30053
-#define KEY_CTRL_MENU       30003
-#define	KEY_CTRL_RESERVE1	30060
-#define	KEY_CTRL_RESERVE2	30061
-#define	KEY_CTRL_RESERVE3	30062
-
-
-// in Bkey_GetKeyWait function
-#define KEYWAIT_HALTON_TIMEROFF     0
-#define KEYWAIT_HALTOFF_TIMEROFF    1
-#define KEYWAIT_HALTON_TIMERON      2
-
-#define KEYREP_NOEVENT              0
-#define KEYREP_KEYEVENT             1
-#define KEYREP_TIMEREVENT           2
-
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/include/timer.h b/debug/include/timer.h
deleted file mode 100644
index 286f665..0000000
--- a/debug/include/timer.h
+++ /dev/null
@@ -1,31 +0,0 @@
-/*****************************************************************/
-/*                                                               */
-/*   CASIO fx-9860G SDK Library                                  */
-/*                                                               */
-/*   File name : timer.h                                         */
-/*                                                               */
-/*   Copyright (c) 2006 CASIO COMPUTER CO., LTD.                 */
-/*                                                               */
-/*****************************************************************/
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-#ifndef __TIMER_H__
-#define __TIMER_H__
-
-
-// Defines
-
-#define ID_USER_TIMER1          1
-#define ID_USER_TIMER2          2
-#define ID_USER_TIMER3          3
-#define ID_USER_TIMER4          4
-#define ID_USER_TIMER5          5
-
-#endif
-
-#ifdef __cplusplus
-}
-#endif
diff --git a/debug/libfx.a b/debug/libfx.a
deleted file mode 100644
index 5ef92aa..0000000
Binary files a/debug/libfx.a and /dev/null differ
diff --git a/debug/vsprintf.c b/debug/vsprintf.c
deleted file mode 100644
index ad18ba3..0000000
--- a/debug/vsprintf.c
+++ /dev/null
@@ -1,160 +0,0 @@
-//---
-//	vsprintf()
-//
-//	Unfortunately this function, which is part of fxlib, was broken by a
-//	terribly un-professional port (incidentally, I am responsible for
-//	this, so I can't complain). So we'll need something simple...
-//
-//      Format    Flags     Character count
-//	  %d        none       no
-//        %x        0          yes
-//        %p        none       no
-//        %c        none       no
-//        %s        none       no
-//---
-
-#include <stdarg.h>
-#include <stdint.h>
-
-void vsprintf_int(char **buffer_ptr, int n)
-{
-	char *buffer = *buffer_ptr;
-	if(!n)
-	{
-		*buffer++ = '0';
-		*buffer_ptr = buffer;
-		return;
-	}
-	if(n < 0)
-	{
-		*buffer++ = '-';
-		n = -n;
-	}
-
-	int digits = 0, x = n, copy;
-	while(x) digits++, x /= 10;
-	copy = digits;
-
-	while(digits)
-	{
-		buffer[--digits] = n % 10 + '0';
-		n /= 10;
-	}
-
-	*buffer_ptr = buffer + copy;
-}
-
-void vsprintf_hexa(char **buffer_ptr, uint32_t val, int digits, int zero)
-{
-	char *buffer = *buffer_ptr;
-	if(!val)
-	{
-		while(digits-- > 1) *buffer++ = (zero) ? '0' : ' ';
-		*buffer++ = '0';
-		*buffer_ptr = buffer;
-		return;
-	}
-
-	if(digits <= 0)
-	{
-		uint32_t x = val;
-		while(x) digits++, x >>= 4;
-	}
-	int copy = digits;
-
-	while(val && digits)
-	{
-		buffer[--digits] = (val & 15) + '0' + 39 * ((val & 15) > 9);
-		val >>= 4;
-	}
-	while(digits)
-	{
-		buffer[--digits] = (zero) ? '0': ' ';
-	}
-
-	*buffer_ptr = buffer + copy;
-}
-
-void vsprintf_ptr(char **buffer_ptr, void *ptr)
-{
-	vsprintf_hexa(buffer_ptr, (uint32_t)ptr, 8, 1);
-}
-
-void vsprintf_char(char **buffer_ptr, int c)
-{
-	char *buffer = *buffer_ptr;
-	*buffer++ = c;
-	*buffer_ptr = buffer;
-}
-
-void vsprintf_str(char **buffer_ptr, const char *str)
-{
-	char *buffer = *buffer_ptr;
-	while(*str) *buffer++ = *str++;
-	*buffer_ptr = buffer;
-}
-
-int vsprintf(char *buffer, const char *format, va_list args)
-{
-	char *save = buffer;
-	int zero, count;
-
-	while(*format)
-	{
-		if(*format != '%')
-		{
-			*buffer++ = *format++;
-			continue;
-		}
-		if(!*++format) break;
-
-		zero = 0;
-		count = 0;
-
-		if(*format == '0') zero = 1, format++;
-		while(*format >= '0' && *format <= '9')
-		{
-			count *= 10;
-			count += (*format++ - '0');
-		}
-		if(!*format) break;
-
-		switch(*format)
-		{
-		case 'd':
-			vsprintf_int(&buffer, va_arg(args, int));
-			break;
-		case 'x':
-			vsprintf_hexa(&buffer, va_arg(args, uint32_t), count,
-				zero);
-			break;
-		case 'p':
-			vsprintf_ptr(&buffer, va_arg(args, void *));
-			break;
-		case 'c':
-			vsprintf_char(&buffer, va_arg(args, int));
-			break;
-		case 's':
-			vsprintf_str(&buffer, va_arg(args, const char *));
-			break;
-		default:
-			*buffer++ = *format;
-			break;
-		}
-
-		format++;
-	}
-
-	*buffer = 0;
-	return buffer - save;
-}
-
-int sprintf(char *buffer, const char *format, ...)
-{
-	va_list args;
-	va_start(args, format);
-	int x = vsprintf(buffer, format, args);
-	va_end(args);
-
-	return x;
-}
diff --git a/demo/gintdemo.c b/demo/gintdemo.c
index cfc653d..4655bf6 100644
--- a/demo/gintdemo.c
+++ b/demo/gintdemo.c
@@ -277,8 +277,7 @@ void tlb_debug(void)
 }
 */
 
-#include <modules/rtc.h>
-#include <modules/interrupts.h>
+#include <internals/timer.h>
 
 /*
 	main_menu()
@@ -435,14 +434,11 @@ void main_menu(int *category, int *app)
 				index	= 0;
 				scroll	= 0;
 				break;
-			case KEY_F5:
-				gint_switch();
-				break;
-			case KEY_F6:;
+/*			case KEY_F6:;
 				void screen(void);
 				screen();
 				break;
-
+*/
 			case KEY_UP:
 				if(list && list_len > 1)
 				{
@@ -484,11 +480,6 @@ void main_menu(int *category, int *app)
 				if(app) *app = index + 1;
 				return;
 
-/*			case KEY_MENU:
-				if(category) *category = 0;
-				if(app) *app = 0;
-				return;
-*/
 			default:
 				leave = 0;
 			}
@@ -533,7 +524,7 @@ int main(void)
 	return 0;
 }
 
-void crash(void)
+static void crash(void)
 {
 	__asm__(
 		"mov	#0, r0		\n\t"
@@ -542,7 +533,7 @@ void crash(void)
 	);
 }
 
-void screen(void)
+static void screen(void)
 {
 	enum { File = 1, Folder = 5 };
 	enum { Read = 0x01, Write = 0x02, ReadWrite = Read | Write };
diff --git a/demo/gintdemo.ld b/demo/gintdemo.ld
index 7a7d11e..5df3f76 100644
--- a/demo/gintdemo.ld
+++ b/demo/gintdemo.ld
@@ -13,36 +13,32 @@ ENTRY(_start)
 
 MEMORY
 {
+	/* System-managed mappings map this area into the add-in data */
 	rom	: o = 0x00300200, l = 512k
-	/* 0x0810000 is apparently mapped to 0x8801c0000. */
+	/* 0x0810000 is apparently mapped to 0x8801c0000 */
 	ram	: o = 0x08100000, l = 8k
+	/* RAM section from P1 area, no MMU involved */
 	realram	: o = 0x8800d000, l = 12k
 }
 
 SECTIONS
 {
-	/*
-		ROM sections : binary code and read-only data.
-	*/
+	/* ROM sections: binary code and read-only data */
 
 	.text : {
-		_btext = . ;
-
 		/* Initialization code. */
 		*(.pretext.entry)
 		*(.pretext)
 
-		_bctors = . ;
+		_bctors = ABSOLUTE(.);
 		*(.ctors)
-		_ectors = . ;
-		_bdtors = . ;
+		_ectors = ABSOLUTE(.);
+		_bdtors = ABSOLUTE(.);
 		*(.dtors)
-		_edtors = . ;
+		_edtors = ABSOLUTE(.);
 
 		*(.text)
 		*(.text.*)
-
-		_etext = . ;
 	} > rom
 
 	.rodata : {
@@ -55,26 +51,23 @@ SECTIONS
 		_romdata = ALIGN(4) ;
 	} > rom
 
-
-
-	/*
-		RAM sections : bss section and read/write data.
-		The BSS section is meant to be stripped from the ELF file (to
-		reduce the binary size) and initialized with zeros in the
-		initialization routine, therefore its location is undefined.
-	*/
+	/* RAM sections: bss section and read/write data
+	   The .bss section is to be stripped from the ELF file and wiped at
+	   startup, hence its location is undefined */
 
 	.bss : {
-		_bbss = . ;
+		_bbss = ABSOLUTE(.);
+		_sbss = ABSOLUTE(SIZEOF(.bss));
+
 		*(.bss)
-		_ebss = . ;
 	} > ram
 
 	.data : AT(_romdata) ALIGN(4) {
-		_bdata = . ;
+		_bdata = ABSOLUTE(.);
+		_sdata = ABSOLUTE(SIZEOF(.data));
+
 		*(.data)
 		*(.data.*)
-		_edata = . ;
 	} > ram
 
 	.cc : AT(_romdata + SIZEOF(.data)) ALIGN(4) {
@@ -82,33 +75,39 @@ SECTIONS
 		*(.jcr)
 
 		. = ALIGN(4);
-		_gint_data = _romdata + SIZEOF(.data) + SIZEOF(.cc) ;
 	} > ram
 
+	/* Real RAM sections: interrupt handlers and some *uninitialized* gint
+	   data */
 
-
-	/*
-		Real RAM : interrupt, exception and TLB miss handlers.
-	*/
+	_gint_data = _romdata + SIZEOF(.data) + SIZEOF(.cc) ;
 
 	.gint : AT(_gint_data) ALIGN(4) {
-		/* The vbr needs to be 0x100-aligned because of an ld issue. */
+		/* The vbr needs to be 0x100-aligned because of an ld issue */
 		. = ALIGN(0x100) ;
-		_gint_vbr = . ;
-		_bgint = . ;
 
-		/* Exception handler. */
+		_gint_vbr = . ;
+		_bgint = ABSOLUTE(.) ;
+
+		/* Exception handler */
 		. = _gint_vbr + 0x100 ;
 		*(.gint.exc)
 
-		/* TLB miss handler. */
+		/* TLB miss handler */
 		. = _gint_vbr + 0x400 ;
 		*(.gint.tlb)
 
-		/* Interrupt handler. */
+		/* Interrupt handler */
 		. = _gint_vbr + 0x600 ;
 		*(.gint.int)
 
-		_egint = . ;
+		. = ALIGN(4);
+		_egint = ABSOLUTE(.) ;
+	} > realram
+
+	.gint_bss : AT(_gint_data + SIZEOF(.gint)) ALIGN(4) {
+		_bgbss = ABSOLUTE(.) ;
+		*(.gint.bss)
+		_egbss = ABSOLUTE(.) ;
 	} > realram
 }
diff --git a/demo/resources/font_modern.bmp b/demo/resources/font_modern.bmp
index 0340f76..1286f30 100644
Binary files a/demo/resources/font_modern.bmp and b/demo/resources/font_modern.bmp differ
diff --git a/demo/resources/opt_gray.bmp b/demo/resources/opt_gray.bmp
index 87ba1c7..6d60c62 100644
Binary files a/demo/resources/opt_gray.bmp and b/demo/resources/opt_gray.bmp differ
diff --git a/demo/test_gray.c b/demo/test_gray.c
index 4a1ac03..894aa93 100644
--- a/demo/test_gray.c
+++ b/demo/test_gray.c
@@ -11,27 +11,26 @@
 static void draw(int delay1, int delay2, int selected)
 {
 	extern image_t res_opt_gray;
+	extern font_t res_font_modern;
 	uint32_t *vl = gray_lightVRAM();
 	uint32_t *vd = gray_darkVRAM();
 
 	gclear();
 	locate(1, 1, "Gray engine");
 
-	for(int i = 0; i < 36; i++)
+	for(int i = 0; i < 64; i++)
 	{
-		int o = ((i + 12) << 2) + 2;
-		unsigned light	= -((i % 24) < 12);
-		unsigned dark	= -(i < 24);
-		vl[o]		= light >> 8;
-		vl[o + 1]	= light << 8;
-		vd[o]		= dark >> 8;
-		vd[o + 1]	= dark << 8;
+		int offset = (i << 2) + 3;
+		vl[offset] = -(!(i & 16));
+		vd[offset] = -(i < 32);
 	}
 
-	locate(3, 3, "light");
-	print(4, 4, "%d", delay1);
+	text_configure(&res_font_modern, color_black);
+	gtext(13, 17, "light");
+	gtext(13, 31, "dark");
 
-	locate(3, 5, "dark");
+	text_configure(NULL, color_black);
+	print(4, 4, "%d", delay1);
 	print(4, 6, "%d", delay2);
 
 	locate(3, selected ? 6 : 4, "\x02");
diff --git a/demo/test_keyboard.c b/demo/test_keyboard.c
index 02ea379..59f0471 100644
--- a/demo/test_keyboard.c
+++ b/demo/test_keyboard.c
@@ -4,9 +4,8 @@
 #include <stdlib.h>
 #include <events.h>
 
-static int draw_keyboard(volatile uint8_t *state)
+static void draw_keyboard(volatile uint8_t *state)
 {
-	int pressed_keys = 0;
 	int i, j, k, l;
 	int x, y;
 
@@ -30,7 +29,6 @@ static int draw_keyboard(volatile uint8_t *state)
 		// Drawing a filled shape when the key is pressed.
 		if(state[i] & (0x80 >> j))
 		{
-			pressed_keys++;
 			for(k = -2; k <= 2; k++) for(l = -2; l <= 2; l++)
 				if(abs(k) + abs(l) <= 2)
 					dpixel(x + k, y + l, color_black);
@@ -51,8 +49,6 @@ static int draw_keyboard(volatile uint8_t *state)
 
 	// An horizontal line to separate parts of the keyboard.
 	dline(5, 28, 32, 28, color_black);
-
-	return pressed_keys;
 }
 
 typedef struct {
@@ -66,7 +62,7 @@ typedef struct {
 	int pressed;
 } history_t;
 
-static int pressed_keys = -1;
+static int pressed_keys = 0;
 static int releases = 0;
 
 static void history_push(history_t *h, event_t event)
@@ -120,19 +116,25 @@ static void draw_events(history_t *h)
 	};
 
 	int y = 3;
+	int y_limit = 8 - (h->pressed > h->size);
 
-	print(8, 2, "%d %d %d", pressed_keys, h->pressed, releases);
+	extern font_t res_font_modern;
+	text_configure(&res_font_modern, color_black);
+	dtext(49, 12, "Key");
+	dtext(89, 12, "Rep.");
+	// dprint(49, 7, "%d %d %d", h->pressed, pressed_keys, releases);
+	text_configure(NULL, color_black);
+	dline(45, 18, 120, 18, color_black);
 
-	for(int i = 0; i < h->size; i++)
+	for(int i = 0; i < h->size && y < y_limit; i++) if(h->data[i].key)
 	{
-		if(!h->data[i].key) continue;
-		print(8, y, "%s", key_names[key_id(h->data[i].key)]);
+		dtext(49, y * 8 - 4, key_names[key_id(h->data[i].key)]);
 		if(h->data[i].repeats > 1)
-			print(18, y, "%d", h->data[i].repeats);
+			dprint(89, y * 8 - 4, "%d", h->data[i].repeats);
 		y++;
 	}
 
-	if(h->pressed > h->size) print(8, 8, "(more)");
+	if(h->pressed > h->size) dtext(49, 52, "(more)");
 }
 
 /*
@@ -149,15 +151,37 @@ void test_keyboard_events(void)
 	};
 	event_t event;
 
+	// There may be keys pressed when this test starts. We need to detect
+	// which and create a valid history for them.
+	volatile const uint8_t *buffer = keyboard_stateBuffer();
+
+	// For the purpose of this function we don't need to calculate the
+	// other fields.
+	event_t push_event = {
+		.type		= event_key_press,
+		.key.code	= KEY_AC_ON,
+	};
+
+	// Finding all the pressed keys and pushing them in the history.
+	if(buffer[0] & 1) history_push(&history, push_event);
+	for(int row = 1; row <= 9; row++) for(int col = 0; col < 8; col++)
+	{
+		// Eliminate non-existing keys.
+		if(col > 6 || col <= (row <= 4)) continue;
+
+		if(buffer[row] & (1 << col))
+		{
+			push_event.key.code = (col << 4) | row;
+			history_push(&history, push_event);
+		}
+	}
+
 	while(1)
 	{
 		dclear();
 		locate(1, 1, "Keyboard and events");
 
-		// There may be more than zero keys pressed when this test
-		// starts. We need to detect this count automatically.
-		int x = draw_keyboard(keyboard_stateBuffer());
-		if(pressed_keys < 0) pressed_keys = x;
+		draw_keyboard(keyboard_stateBuffer());
 
 		draw_events(&history);
 		dupdate();
diff --git a/include/events.h b/include/events.h
index a30729a..b4bce55 100644
--- a/include/events.h
+++ b/include/events.h
@@ -49,14 +49,14 @@ typedef struct
 {
 	// This is the key code as defined in <keyboard.h> (a matrix code), and
 	// probably what you need.
-	uint32_t	code;
+	uint16_t	code;
 	// This is a "compact id" which can be used for array subscript. There
 	// are only a few holes in the "compact id" numbering.
-	uint32_t	id;
+	uint16_t	id;
 	// Character associated with the event key.
 	int		character;
 
-} key_event_t;
+} __attribute__((packed, aligned(4))) key_event_t;
 
 /*
 	event_t
@@ -77,7 +77,7 @@ typedef struct
 		timer_t *timer;
 	};
 
-} event_t;
+} __attribute__((packed, aligned(4))) event_t;
 
 
 
diff --git a/include/internals/gint.h b/include/internals/gint.h
index fd51e06..6e7ed83 100644
--- a/include/internals/gint.h
+++ b/include/internals/gint.h
@@ -2,6 +2,7 @@
 #define	_INTERNALS_GINT_H
 
 #include <stdint.h>
+#include <mpu.h>
 #include <gint.h>
 
 //---
@@ -45,7 +46,7 @@ void gint_setvbr(uint32_t vbr, void (*setup)(void));
 	Initializes gint. Loads the interrupt handler into the memory and sets
 	the new vbr address.
 */
-void gint_init(void);
+void gint_init(mpu_t mpu);
 
 /*
 	gint_quit()
@@ -135,101 +136,4 @@ void gint_restore_and_unlock_7305(environment_7305_t *env);
 volatile void *gint_reg_7705(gint_register_t reg);
 volatile void *gint_reg_7305(gint_register_t reg);
 
-
-
-//---
-//	Diagnostics
-//	When diagnostics are enabled, gint saves runtime information to a
-//	buffer in RAM, which by chance is held if the application crashes (I
-//	don't really know why). This allows deeper debugging.
-//---
-
-#ifdef	GINT_DIAGNOSTICS
-
-#include <mpu.h>
-
-// Determining whether the SaveDisp() buffer actually contains gint diagnostics
-// is performed by checking a magic number (1/256 chance of failure) and the
-// validity of all fields in the diagnostic information. Formally, a picture
-// taken by SaveDisp() could fool the checks but this is *very* unlikely and
-// the diagnostics should only be read just after gint crashes or stops anyway.
-#define	GINT_DIAGNOSTICS_MAGIC	0xb7
-
-typedef enum
-{
-	stage_startup		= 0,
-	stage_sections		= 1,
-	stage_mmu		= 2,
-	stage_gint		= 3,
-	stage_clock		= 4,
-	stage_ctors		= 5,
-	stage_running		= 6,
-	stage_leaving		= 7,
-	stage_dtors		= 8,
-	stage_terminated	= 9,
-
-} gint_stage_t;
-
-typedef struct
-{
-	uint32_t address;
-	uint32_t length;
-
-} gint_memsection_t;
-
-typedef struct
-{
-	// Magic number to check whether there is a diagnostic.
-	uint8_t magic		:8;
-	// Unique counter that is incremented at each execution, allowing to
-	// distinguish diagnostics output at different times if the application
-	// crashes repeatedly.
-	uint8_t counter		:8;
-	// How many work of initialization had been successfully done before
-	// the application crashed.
-	gint_stage_t stage	:8;
-	// What kind of MPU the library detected (undefined if the
-	// initialization stage does not reach stage_gint).
-	mpu_t mpu		:8;
-
-	// Frequency of the main clocks, in MHz.
-	uint8_t Bphi_f		:8;
-	uint8_t Iphi_f		:8;
-	uint8_t Pphi_f		:8;
-
-	// What kind of exceptions occurred last.
-	uint8_t excepts		:8;
-	uint8_t except_vect[12];
-	// Last values held by registers SPC, SSR, EXPEVT / INTEVT2 / INTEVT,
-	// and TEA.
-	uint32_t spc;
-	uint32_t ssr;
-	uint32_t expevt;
-	uint32_t tea;
-
-	// Gint version number, on the form 0xMMmmbbbb, where MM is the major
-	// version, mm the minor version and bbbb the build number.
-	uint32_t version;
-	// Location of the VBR at the time of execution.
-	uint32_t vbr_address;
-
-	// Memory map.
-	uint32_t romdata;
-	gint_memsection_t	section_text;
-	gint_memsection_t	section_data;
-	gint_memsection_t	section_bss;
-	gint_memsection_t	section_gint;
-
-} gint_diagnostics_t;
-
-// This is somewhere inside the buffers of SaveDisp(), 3 bytes inside the first
-// buffer to be exact (that's to be 4-aligned).
-// This buffer is 1024-byte long so the logs must fit in 1021 bytes to be safe.
-// It looks like that this RAM area is generally not cleared when the 
-// calculator reboots after a crash, even though it does not seem to work with
-// manual resets. Maybe it can provide useful information in some cases.
-#define	gint_diagnostics() ((volatile gint_diagnostics_t *)0x88004d90)
-
-#endif	// GINT_DIAGNOSTICS
-
 #endif	// _INTERNALS_GINT_H
diff --git a/include/internals/init.h b/include/internals/init.h
new file mode 100644
index 0000000..66b3b29
--- /dev/null
+++ b/include/internals/init.h
@@ -0,0 +1,37 @@
+//---
+//	gint core module: init
+//	Program initialization and display manipulation for the startup logs.
+//---
+
+#ifndef	_INTERNALS_INIT_H
+#define	_INTERNALS_INIT_H
+
+#include <display.h>
+
+struct qdiv
+{
+	uint32_t q, r;
+};
+
+/* qdiv10() -- quickly divide by 10 */
+struct qdiv qdiv10(uint32_t n);
+
+/* init_version() -- get a version string */
+const char *init_version(void);
+
+/* init_stage() -- change the current init stage */
+void init_stage(const char *name);
+
+/* init_halt() -- halt the program */
+void init_halt(void);
+
+/* print() -- print text on a 21*8 grid */
+#define print(x, y, str) dtext((x) * 6 - 5, (y) * 8 - 8, (str))
+
+/* print_dec() -- print a number in base 10 */
+void print_dec(int x, int y, int n, int digits);
+
+/* print_hex() -- print a number in base 16 */
+void print_hex(int x, int y, uint32_t n, int digits);
+
+#endif	// _INTERNALS_INIT_H
diff --git a/include/internals/keyboard.h b/include/internals/keyboard.h
index 2ed7f9e..01d24eb 100644
--- a/include/internals/keyboard.h
+++ b/include/internals/keyboard.h
@@ -39,4 +39,11 @@ int getPressedKeys(volatile uint8_t *keyboard_state, int *keys, int count);
 void keyboard_updateState_7705(volatile uint8_t *state);
 void keyboard_updateState_7305(volatile uint8_t *state);
 
+/*
+	keyboard_interrupt()
+	Answers an interrupt event by updating the keyboard state and
+	generating the associated keyboard events.
+*/
+void keyboard_interrupt(void);
+
 #endif	// _INTERNALS_KEYBOARD_H
diff --git a/include/internals/syscalls.h b/include/internals/syscalls.h
new file mode 100644
index 0000000..ae05b78
--- /dev/null
+++ b/include/internals/syscalls.h
@@ -0,0 +1,26 @@
+//---
+//	gint core module: syscalls
+//	Some of the functionality still requires interacting with the system.
+//---
+
+#ifndef	_INTERNALS_SYSCALLS_H
+#define	_INTERNALS_SYSCALLS_H
+
+#include <stddef.h>
+
+/* malloc() -- allocate data in heap */
+void *__malloc(size_t size);
+
+/* free() -- free data allocated by malloc(), calloc() or realloc() */
+void __free(void *ptr);
+
+/* realloc() -- reallocate a chunk of memory */
+void *__realloc(void *chunk, size_t new_size);
+
+/* get_os_version() -- write the OS version in format MM.mm.pppp to a string */
+void __get_os_version(char *str);
+
+/* system_menu() -- go back to menu, assuming the system has the control */
+void __system_menu(const void *vram);
+
+#endif	// _INTERNALS_SYSCALLS_H
diff --git a/include/internals/tales.h b/include/internals/tales.h
index a599d4c..455246d 100644
--- a/include/internals/tales.h
+++ b/include/internals/tales.h
@@ -10,13 +10,6 @@
 extern font_t *font;
 extern color_t operator;
 
-/*
-	tales_init()
-	Configures tales with the default font (which is part of gint).
-*/
-__attribute__((constructor))
-void tales_init(void);
-
 /*
 	getCharacterIndex()
 	Returns the index of a character in a font data area depending on the
diff --git a/include/internals/timer.h b/include/internals/timer.h
index c169a6e..8e4feec 100644
--- a/include/internals/timer.h
+++ b/include/internals/timer.h
@@ -11,11 +11,9 @@
 */
 typedef struct timer_t
 {
-	// Current delay, how much time elapsed since last interrupt occurred,
-	// and how many repeats are left.
-	int ms_delay;
-	int ms_elapsed;
-	int repeats_left;
+	// Current delay, how much time elapsed since last interrupt occurred.
+	uint32_t ms_delay;
+	uint32_t ms_elapsed;
 
 	// Is the virtual slot free? Is the virtual timer active?
 	uint8_t	used		:1;
@@ -25,12 +23,14 @@ typedef struct timer_t
 	uint8_t vsupport	:1;
 	// How many events do I have received but not executed?
 	uint8_t	events		:4;
+	// How many repeats are left.
+	uint32_t repeats_left	:24;
 
 	// Callback function (NULL for event-firing timers) and its argument.
 	void *callback;
 	void *argument;
 
-} timer_t;
+} __attribute__((packed, aligned(4))) timer_t;
 
 // Hardware timers.
 extern timer_t htimers[3];
diff --git a/include/mpu.h b/include/mpu.h
index d62919c..8b7219d 100644
--- a/include/mpu.h
+++ b/include/mpu.h
@@ -12,8 +12,8 @@
 //	care of assuming unknown MPUs are SH4, which is the more reasonable
 //	option.
 //
-//	In a general way, it is advised to always use the following
-//	alternative (which gint does):
+//	It is advised to always use the following alternative (which gint
+//	does):
 //
 //		if(isSH3())
 //		{
@@ -54,7 +54,7 @@ extern const mpu_t MPU_CURRENT;
 // Quick SH3 test. It is safer to assume that an unknown model is SH4 because
 // SH3-based models are not produced anymore.
 #define isSH3() (MPU_CURRENT == mpu_sh7337 || MPU_CURRENT == mpu_sh7355)
-#define isSH4() !isSH3()
+#define isSH4() (!isSH3())
 
 
 
diff --git a/src/core/crt0.c b/src/core/crt0.c
deleted file mode 100644
index 618af26..0000000
--- a/src/core/crt0.c
+++ /dev/null
@@ -1,253 +0,0 @@
-#include <stdlib.h>
-#include <string.h>
-#include <setjmp.h>
-#include <stdint.h>
-
-#include <internals/gint.h>
-#include <internals/mmu.h>
-#include <internals/clock.h>
-#include <clock.h>
-#include <gint.h>
-#include <internals/modules.h>
-
-int main(void);
-
-static void init(void);
-static void fini(void);
-
-// Symbols provided by the linker script.
-extern uint32_t
-	etext, btext,		// Location of .text section
-	bdata, edata,		// Location of .data section
-	bbss, ebss,		// Location of .bss section
-	bgint, egint,		// Location of interrupt handler and gint data
-	gint_vbr,		// VBR address
-	romdata;		// ROM address of .data section contents
-
-// This variable should be overwritten before being returned, so the default
-// value doesn't matter much.
-static int exit_code = EXIT_SUCCESS;
-static jmp_buf env;
-
-// Exit handlers.
-void (*atexit_handlers[ATEXIT_MAX])(void);
-int atexit_index = 0;
-
-
-
-/*
-	start()
-	Program entry point. Loads the data section into the memory and invokes
-	main(). Also prepares the execution environment by initializing all the
-	modules.
-*/
-__attribute__((section(".pretext.entry"))) int start(void)
-{
-	#ifdef	GINT_DIAGNOSTICS
-
-	// OK, so fill as much information as possible so that in case anything
-	// goes wrong we can try to analyze what's been going on.
-	volatile gint_diagnostics_t *dg = gint_diagnostics();
-
-	// All that follows is "safe" information that can be saved immediately
-	// because it will never change anyway.
-	// Basic environment description.
-	dg->magic	= GINT_DIAGNOSTICS_MAGIC;
-	dg->counter	= dg->counter + 1;
-	dg->mpu		= mpu_unknown;
-	dg->version	= (uint32_t)&GINT_VERSION;
-	dg->stage	= stage_startup;
-
-	// Exception records: what kind of exceptions / TLB faults / interrupts
-	// occurred last to get some trace in case of crash.
-	dg->excepts	= 0;
-	for(size_t i = 0; i < sizeof dg->except_vect; i++)
-		dg->except_vect[i] = 0;
-	dg->spc		= 0x00000000;
-	dg->ssr		= 0x00000000;
-	dg->expevt	= 0x00000000;
-	dg->tea		= 0x00000000;
-
-	// Memory map: provides information about alignment and the relative
-	// size and position of each section, as well as read-only / read-write
-	// types of addresses.
-	dg->section_text.address	= (uint32_t)&btext;
-	dg->section_text.length		= (uint32_t)&etext - (uint32_t)&btext;
-	dg->section_data.address	= (uint32_t)&bdata;
-	dg->section_data.length		= (uint32_t)&edata - (uint32_t)&bdata;
-	dg->section_bss.address		= (uint32_t)&bbss;
-	dg->section_bss.length		= (uint32_t)&ebss  - (uint32_t)&bbss;
-	dg->romdata			= (uint32_t)&romdata;
-
-	// Basic information about the running library.
-	dg->vbr_address			= (uint32_t)&gint_vbr;
-	dg->section_gint.address	= (uint32_t)&bgint;
-	dg->section_gint.length		= (uint32_t)&egint - (uint32_t)&bgint;
-	#endif
-
-	// Clearing the .bss section.
-	uint32_t *bss = &bbss;
-	while(bss < &ebss) *bss++ = 0;
-
-	// Copying the .data section.
-	uint32_t *data = &bdata, *src = &romdata;
-	while(data < &edata) *data++ = *src++;
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->stage	= stage_sections;
-	#endif
-
-	// Trying to get the system to fill the TLB without editing it
-	// directly, so that it does not go on rampage when finding out.
-	mmu_pseudoTLBInit();
-
-	#ifdef	GINT_DIAGNOSTICS
-	// At this point it would be wise to include a copy of the TLB, but
-	// it's already a huge array. Maybe later...
-	/* TODO Debug TLB? */
-	dg->stage	= stage_mmu;
-	#endif
-
-	// Initializing gint, which does several things:
-	//   - Detect the MPU and platform
-	//   - Initialize register addresses in a platform-independent way
-	//   - Save the current environment information in a large buffer
-	//   - Set up the interrupt handler and configure everything gint needs
-	gint_init();
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->mpu		= MPU_CURRENT;
-	dg->stage	= stage_gint;
-	#endif
-
-	// Measuring clock frequencies.
-	clock_measure();
-	clock_measure_end();
-
-	#ifdef	GINT_DIAGNOSTICS
-	clock_config_t clock = clock_config();
-	dg->Bphi_f	= clock.Bphi_f / 1000000;
-	dg->Iphi_f	= clock.Iphi_f / 1000000;
-	dg->Pphi_f	= clock.Pphi_f / 1000000;
-	dg->stage	= stage_clock;
-	#endif
-
-	// Calling global constructors.
-	init();
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->stage	= stage_ctors;
-	dg->stage	= stage_running;
-	#endif
-
-	// Saving the execution state there.
-	int x = setjmp(env);
-	// If the program has just started, executing main(). Otherwise, the
-	// exit code has already been set by abort() or similar.
-	if(!x) exit_code = main();
-
-
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->stage	= stage_leaving;
-	#endif
-
-	/* TODO Flush and close opened streams. */
-
-	// Calling exit handlers and destructors.
-	while(atexit_index > 0) (*atexit_handlers[--atexit_index])();
-	fini();
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->stage	= stage_dtors;
-	#endif
-
-	// Un-initializing gint.
-	gint_quit();
-
-	#ifdef	GINT_DIAGNOSTICS
-	dg->stage	= stage_terminated;
-	#endif
-
-	return exit_code;
-}
-
-/*
-	init()
-	Calls the constructors.
-*/
-static void init(void)
-{
-	extern void
-		(*bctors)(void),
-		(*ectors)(void);
-	void (**func)(void) = &bctors;
-
-	while(func < &ectors)
-	{
-		(*(*func))();
-		func++;
-	}
-}
-
-/*
-	fini()
-	Calls the destructors.
-*/
-static void fini(void)
-{
-	extern void
-		(*bdtors)(void),
-		(*edtors)(void);
-	void (**func)(void) = &bdtors;
-
-	while(func < &edtors)
-	{
-		(*(*func))();
-		func++;
-	}
-}
-
-
-
-/*
-	abort()
-	Immediately ends the program without invoking the exit handlers.
-*/
-void abort(void)
-{
-	exit_code = EXIT_FAILURE;
-
-	// Avoiding any exit handler call.
-	atexit_index = 0;
-
-	longjmp(env, 1);
-}
-
-/*
-	exit()
-	Ends the program and returns the given exit code status. Calls exit
-	handlers before returning.
-	Usually exit() would ask the operating system to stop the process but
-	the fx-9860G executes only one program at a time and calls it as a
-	function. Reaching the program end point is therefore an efficient way
-	of achieving this goal while minimizing interaction with the operating
-	system.
-*/
-void exit(int status)
-{
-	exit_code = status;
-	longjmp(env, 1);
-}
-
-/*
-	atexit()
-	Registers a function to be called at normal program termination.
-*/
-int atexit(void (*function)(void))
-{
-	if(atexit_index >= ATEXIT_MAX) return 1;
-
-	atexit_handlers[atexit_index++] = function;
-	return 0;
-}
diff --git a/src/core/init_quit.c b/src/core/init_quit.c
index 6103f41..4d92d5c 100644
--- a/src/core/init_quit.c
+++ b/src/core/init_quit.c
@@ -21,11 +21,11 @@ static void setup(void)
 	isSH3()	? gint_lock_and_setup_7705()
 		: gint_lock_and_setup_7305();
 }
-void gint_init(void)
+void gint_init(mpu_t mpu)
 {
-	// Detecting the MPU type. I don't like const-casting but this is still
+	// Setting the MPU type. I don't like const-casting but this is still
 	// better than allowing the user to change the variable by mistake.
-	*((mpu_t *)&MPU_CURRENT) = getMPU();
+	*((mpu_t *)&MPU_CURRENT) = mpu;
 	// Loading the register addresses of the current platform.
 	mod_init();
 
@@ -89,23 +89,29 @@ void gint_quit(void)
 #include <display.h>
 #include <gray.h>
 
+/*
+	__system_menu()
+	Updates the system's vram and triggers the calculator's main menu.
+*/
+void __system_menu(void *vram);
+
+// Stores gint's configuration while the user visits the main menu.
+static environment_t switch_env;
+
 /*
 	gint_switch()
 	Temporarily returns to the system's main menu.
 */
-static environment_t switch_env;
-static void switch_(void)
+static void restore(void)
 {
 	isSH3()	? gint_restore_and_unlock_7705(&switch_env.env_7705)
 		: gint_restore_and_unlock_7305(&switch_env.env_7305);
 }
 void gint_switch(void)
 {
-	// Save the current environment in a special buffer, so that we can
-	// restore it if we ever come back to gint.
 	isSH3()	? gint_save_7705(&switch_env.env_7705)
 		: gint_save_7305(&switch_env.env_7305);
-	// Give the control back to the system.
+
 	gint_setvbr(gint.system_vbr, stop);
 
 	// When returning to the add-in from the menu, the system displays the
@@ -120,5 +126,5 @@ void gint_switch(void)
 	__system_menu(vram);
 
 	// If the user came back, restore the gint working environment.
-	gint_setvbr(gint.gint_vbr, switch_);
+	gint_setvbr(gint.gint_vbr, restore);
 }
diff --git a/src/core/mpu.c b/src/core/mpu.c
index 889e5a7..73d0a46 100644
--- a/src/core/mpu.c
+++ b/src/core/mpu.c
@@ -9,7 +9,8 @@
 #include <mpu.h>
 #include <stdint.h>
 
-const mpu_t MPU_CURRENT;
+/* Located in gint's uninitialized bss section */
+__attribute__((section(".gint.bss"))) const mpu_t MPU_CURRENT;
 
 /*
 	getMPU()
diff --git a/src/core/syscalls.s b/src/core/syscalls.s
index 960c2de..ad7f984 100644
--- a/src/core/syscalls.s
+++ b/src/core/syscalls.s
@@ -1,14 +1,25 @@
 /*
 	gint core module: syscalls
 
-	All the system calls used by the library. Somehow "the less, the
-	better".
-	We have finally gotten rid of every obscure system-related syscalls!
+	System calls (and the like) used by the library. The library should
+	rely the least possible on the system, but sometimes using the syscalls
+	is nothing of a nuisance.
+
+	For instance, using the malloc()-family syscalls is a bit annoying
+	because it "locks" many functionalities. On the other hand, getting the
+	SaveDisp() buffer addresses to store data here is not a problem since
+	such data can very easily be relocated to static RAM.
 */
 
+	/* Dynamic allocation */
 	.global	___malloc
 	.global	___free
 	.global	___realloc
+
+	/* OS version */
+	.global	___get_os_version
+
+	/* Return to menu */
 	.global	___system_menu
 
 
@@ -34,6 +45,13 @@ ___realloc:
 	nop
 1:	.long	0xe6d
 
+___get_os_version:
+	mov.l	syscall_table, r2
+	mov.l	1f, r0
+	jmp	@r2
+	nop
+1:	.long	0x02ee
+
 /*
 	__system_menu()
 	Brings one back to the system menu by putting KEY_MENU in the system's
diff --git a/src/display/display_vram.c b/src/display/display_vram.c
index 34ab168..c0c48ed 100644
--- a/src/display/display_vram.c
+++ b/src/display/display_vram.c
@@ -1,9 +1,8 @@
 #include <display.h>
 
-// Program video ram. It resides in BSS section, therefore it is cleared at
-// program initialization and stripped from the executable file.
-static uint32_t local_vram[256];
-uint32_t *vram = local_vram;
+/* Add-in monochrome vram in gint's uninitialized bss section */
+__attribute__((section(".gint.bss"))) static uint32_t vram_local[256];
+__attribute__((section(".gint.bss"))) uint32_t *vram;
 
 /*
 	display_getLocalVRAM()
@@ -16,7 +15,7 @@ uint32_t *vram = local_vram;
 */
 inline uint32_t *display_getLocalVRAM(void)
 {
-	return local_vram;
+	return vram_local;
 }
 
 /*
@@ -43,6 +42,6 @@ inline uint32_t *display_getCurrentVRAM(void)
 */
 inline void display_useVRAM(uint32_t *ptr)
 {
-	if((intptr_t)ptr & 3) return;
+	if((uintptr_t)ptr & 3) return;
 	vram = ptr;
 }
diff --git a/src/gray/gray_engine.c b/src/gray/gray_engine.c
index 8e9d207..666b725 100644
--- a/src/gray/gray_engine.c
+++ b/src/gray/gray_engine.c
@@ -10,9 +10,12 @@
 #include <screen.h>
 #include <timer.h>
 #include <mpu.h>
+#include <stdlib.h>
 
 // Additional video rams used by the gray engine.
-static uint32_t internal_vrams[3][256];
+#ifdef	GINT_STATIC_GRAY
+static uint32_t internals_vrams[3][256];
+#endif
 static uint32_t *vrams[4];
 
 // Current vram set (0 or 1), delays of the light and dark frames respectively.
@@ -31,10 +34,7 @@ static timer_t *gray_timer = NULL;
 //	Interrupt control and initialization.
 //---
 
-/*
-	gray_interrupt()
-	Answers a timer interrupt. Swaps the buffers.
-*/
+/* gray_interrupt() -- switch buffers and update the screen */
 void gray_interrupt(void)
 {
 	htimer_reload(timer_gray, delays[(~current) & 1]);
@@ -43,21 +43,33 @@ void gray_interrupt(void)
 	current ^= 1;
 }
 
-/*
-	gray_init()
-	Initializes the gray engine.
-*/
-__attribute__((constructor)) void gray_init(void)
+/* gray_init() -- setup the video ram buffers and timer delays */
+__attribute__((constructor)) static void gray_init(void)
 {
 	vrams[0] = display_getLocalVRAM();
+#ifdef	GINT_STATIC_GRAY
 	vrams[1] = internal_vrams[0];
 	vrams[2] = internal_vrams[1];
 	vrams[3] = internal_vrams[2];
-
+#else
+	vrams[1] = NULL;
+	vrams[2] = NULL;
+	vrams[3] = NULL;
+#endif
 	delays[0] = 912;
 	delays[1] = 1343;
 }
 
+/* gray_quit() -- Free the gray engine's heap-allocated video rams */
+__attribute__((destructor)) static void gray_quit(void)
+{
+#ifndef	GINT_STATIC_GRAY
+	free(vrams[1]);
+	free(vrams[2]);
+	free(vrams[3]);
+#endif
+}
+
 
 
 //---
@@ -71,6 +83,14 @@ __attribute__((constructor)) void gray_init(void)
 */
 void gray_start(void)
 {
+#ifndef	GINT_STATIC_GRAY
+	for(int i = 0; i < 4; i++)
+	{
+		if(!vrams[i]) vrams[i] = malloc(1024);
+		/* Don't continue if any of the buffer is missing */
+		if(!vrams[i]) return;
+	}
+#endif
 	if(runs) return;
 
 	gray_timer = htimer_setup(timer_gray, delays[0], timer_Po_64, 0);
diff --git a/src/init/crt0.c b/src/init/crt0.c
new file mode 100644
index 0000000..92ccc69
--- /dev/null
+++ b/src/init/crt0.c
@@ -0,0 +1,306 @@
+#include <stdlib.h>
+#include <setjmp.h>
+
+#include <internals/gint.h>
+#include <internals/mmu.h>
+#include <internals/clock.h>
+
+#include <display.h>
+#include <internals/init.h>
+#include <internals/modules.h>
+
+/* We need some more functionality to generate these */
+#ifdef	GINT_STARTUP_LOG
+  #include <gint.h>
+  #include <clock.h>
+  #include <events.h>
+  #include <internals/keyboard.h>
+  #include <modules/interrupts.h>
+
+  #ifndef GINT_NO_SYSCALLS
+    #include <internals/syscalls.h>
+  #endif
+#endif
+
+int main(void);
+
+static void init(void);
+static void fini(void);
+
+// Symbols provided by the linker script.
+extern uint32_t
+	bdata, sdata,		// Location of .data section
+	bbss,  sbss,		// Location of .bss section
+	bgint, egint,		// Location of interrupt handler and gint data
+	bgbss, egbss,		// Location of interrupt handler and gint data
+	gint_vbr,		// VBR address
+	romdata,		// ROM address of .data section contents
+	gint_data;		// ROM address of .gint section contents
+extern void
+	(*bctors)(void), (*ectors)(void),	// Constructors
+	(*bdtors)(void), (*edtors)(void);	// Destructors
+
+// This variable should be overwritten before being returned, so the default
+// value doesn't matter much.
+static int exit_code = EXIT_SUCCESS;
+static jmp_buf env;
+
+// Exit handlers.
+static void (*atexit_handlers[ATEXIT_MAX])(void);
+static int atexit_index = 0;
+
+#include <internals/display.h>
+
+/*
+	start()
+	Program entry point. Loads the data section into the memory and invokes
+	main(). Also prepares the execution environment by initializing all the
+	modules.
+*/
+__attribute__((section(".pretext.entry"))) int start(void)
+{
+	/* Configure the display output or we won't get anywhere - this is also
+	   needed for the add-in even if the startup logs are disabled */
+	display_useVRAM(display_getLocalVRAM());
+	text_configure(NULL, color_black);
+
+#ifdef GINT_STARTUP_LOG
+	/* Start outputting information on the screen so that we can quickly
+	   debug anything that would fail */
+	uint32_t rom_size  = ((uint32_t)&romdata - 0x00300000) >> 10;
+	uint32_t ram_size  = ((uint32_t)&gint_data - (uint32_t)&romdata)
+			   + ((uint32_t)&sbss);
+	uint32_t rram_size = ((uint32_t)&egbss - (uint32_t)&gint_vbr);
+
+	dclear();
+	init_stage("Startup");
+	dupdate();
+
+	print(1, 1, init_version());
+	print(1, 2, "ROM  RAM  RRAM");
+	print(4, 3, "k           c  d");
+	print_dec(1, 3, rom_size, 3);
+	print_dec(6, 3, ram_size, 4);
+	print_dec(11, 3, rram_size, 4);
+	print_dec(17, 3, &ectors - &bctors, 2);
+	print_dec(20, 3, &edtors - &bdtors, 2);
+	dupdate();
+#endif
+
+	/* Determining the processor type */
+	mpu_t mpu = getMPU();
+
+#ifdef GINT_STARTUP_LOG
+	const char *mpu_names[] = { "SH7337", "SH7355", "SH7305", "SH7724" };
+	if(mpu >= 1 && mpu <= 4) print(16, 2, mpu_names[mpu - 1]);
+	else print_dec(16, 2, mpu, 6);
+	dupdate();
+#endif
+
+	/* Make sure the MPU is of a valid type */
+	if(!mpu || mpu > 4) init_halt();
+
+#ifdef GINT_STARTUP_LOG
+	init_stage("    MMU");
+	dupdate();
+#endif
+
+	/* Try to get the TLB filled by the system by accessing all the pages
+	   while the system still answers TLB misses */
+	mmu_pseudoTLBInit();
+
+#ifdef GINT_STARTUP_LOG
+	/* Read the TLB and count how much memory has been mapped */
+	/* TODO: Debug TLB at startup */
+	print(1, 4, "MMU ROM:???k RAM:???k");
+
+	init_stage("Section");
+	dupdate();
+#endif
+
+	/* Copying the data section, then clearing the bss section. This
+	   doesn't affect the previously used variables, which are stored in
+	   another section for this purpose */
+	volatile uint32_t *data = &bdata;
+	volatile uint32_t *data_end = (void *)&bdata + (int)&sdata;
+	volatile uint32_t *src = &romdata;
+	while(data < data_end) *data++ = *src++;
+	volatile uint32_t *bss = &bbss;
+	volatile uint32_t *bss_end = (void *)&bbss + (int)&sbss;
+	while(bss < bss_end) *bss++ = 0;
+
+#ifdef GINT_STARTUP_LOG
+	init_stage("Handler");
+	dupdate();
+#endif
+
+	/* Initialize gint and debug all the interrupt priorities */
+	gint_init(mpu);
+
+#ifdef GINT_STARTUP_LOG
+	if(isSH3())
+	{
+		print(1, 5, "ABCD");
+		print_hex( 6, 5, INTC._7705.iprs.IPRA->word, 4);
+		print_hex(10, 5, INTC._7705.iprs.IPRB->word, 4);
+		print_hex(14, 5, INTC._7705.iprs.IPRC->word, 4);
+		print_hex(18, 5, INTC._7705.iprs.IPRD->word, 4);
+		print(1, 6, "EFGH");
+		print_hex( 6, 6, INTC._7705.iprs.IPRE->word, 4);
+		print_hex(10, 6, INTC._7705.iprs.IPRF->word, 4);
+		print_hex(14, 6, INTC._7705.iprs.IPRG->word, 4);
+		print_hex(18, 6, INTC._7705.iprs.IPRH->word, 4);
+	}
+	else
+	{
+		print(1, 5, "ACFG");
+		print_hex( 6, 5, INTC._7305.iprs->IPRA.word, 4);
+		print_hex(10, 5, INTC._7305.iprs->IPRC.word, 4);
+		print_hex(14, 5, INTC._7305.iprs->IPRF.word, 4);
+		print_hex(18, 5, INTC._7305.iprs->IPRG.word, 4);
+		print(1, 6, "HJKL");
+		print_hex( 6, 6, INTC._7305.iprs->IPRH.word, 4);
+		print_hex(10, 6, INTC._7305.iprs->IPRJ.word, 4);
+		print_hex(14, 6, INTC._7305.iprs->IPRK.word, 4);
+		print_hex(18, 6, INTC._7305.iprs->IPRL.word, 4);
+	}
+#endif
+
+	/* Checking that at least the required interrupts are enabled */
+	if(isSH3()
+		? (!INTC._7705.iprs.IPRA->word)
+		: (!INTC._7305.iprs->IPRA.word || !INTC._7305.iprs->IPRK.word)
+	) init_halt();
+
+#ifdef GINT_STARTUP_LOG
+	init_stage(" Clocks");
+	dupdate();
+#endif
+
+	/* Measuring the clock speed */
+	clock_measure();
+	clock_measure_end();
+
+#ifdef GINT_STARTUP_LOG
+	clock_config_t clock = clock_config();
+	print(1, 7, "Clock I   B   P");
+	print_dec( 8, 7, clock.Iphi_f / 1000000, 2);
+	print_dec(12, 7, clock.Bphi_f / 1000000, 2);
+	print_dec(16, 7, clock.Pphi_f / 1000000, 2);
+
+	init_stage("Boot OK");
+	dupdate();
+
+	/* Displaying some interrupt controller config */
+	if(isSH3())
+	{
+		print(1, 8, "INTC:0");
+		print_hex(7, 8, INTC._7705.ICR1->word, 4);
+	}
+	else
+	{
+		print(1, 8, "INTC:");
+		print_hex(6, 8, INTC._7305.ICR0->word, 4);
+		print_hex(10, 8, (INTC._7305.USERIMASK->lword >> 4) & 0xf, 1);
+	}
+
+	#ifndef GINT_NO_SYSCALLS
+	/* Print the OS version */
+	char version[11];
+	__get_os_version(version);
+	version[2] = version[3];
+	version[3] = version[4];
+	version[4] = version[6];
+	version[5] = version[7];
+	version[6] = version[8];
+	version[7] = version[9];
+	version[8] = 0;
+	print(12, 8, "OS");
+	print(14, 8, version);
+	#endif
+
+	dupdate();
+#endif
+
+	/* Call the global constructors */
+	init();
+
+#ifdef GINT_STARTUP_LOG
+	/* Keep this visible for a second or so */
+	keyboard_interrupt();
+	if(pollevent().type != event_none) getkey();
+#endif
+
+	/* Otherwise, call main() and get the show on the road! */
+	int x = setjmp(env);
+	if(!x) exit_code = main();
+
+	while(atexit_index > 0) (*atexit_handlers[--atexit_index])();
+	fini();
+
+	gint_quit();
+
+	return exit_code;
+}
+
+/* init() -- call the constructors */
+static void init(void)
+{
+	extern void
+		(*bctors)(void),
+		(*ectors)(void);
+	void (**func)(void) = &bctors;
+
+	while(func < &ectors) (*(*func++))();
+}
+
+/* fini() -- call the destructors */
+static void fini(void)
+{
+	extern void
+		(*bdtors)(void),
+		(*edtors)(void);
+	void (**func)(void) = &bdtors;
+
+	while(func < &edtors) (*(*func++))();
+}
+
+
+
+/*
+	abort()
+	Immediately ends the program without invoking the exit handlers.
+*/
+void abort(void)
+{
+	exit_code = EXIT_FAILURE;
+	// Avoiding any exit handler call.
+	atexit_index = 0;
+	longjmp(env, 1);
+}
+
+/*
+	exit()
+	Ends the program and returns the given exit code status. Calls exit
+	handlers before returning.
+	Usually exit() would ask the operating system to stop the process but
+	the fx-9860G executes only one program at a time and calls it as a
+	function. Reaching the program end point thus efficiently exits.
+*/
+void exit(int status)
+{
+	exit_code = status;
+	longjmp(env, 1);
+}
+
+/*
+	atexit()
+	Registers a function to be called at normal program termination.
+*/
+int atexit(void (*function)(void))
+{
+	if(atexit_index >= ATEXIT_MAX) return 1;
+
+	atexit_handlers[atexit_index++] = function;
+	return 0;
+}
diff --git a/src/init/util.c b/src/init/util.c
new file mode 100644
index 0000000..e930875
--- /dev/null
+++ b/src/init/util.c
@@ -0,0 +1,90 @@
+#include <internals/init.h>
+#include <string.h>
+#include <clock.h>
+#include <gint.h>
+
+/* qdiv10() -- quickly divide by 10 */
+struct qdiv qdiv10(uint32_t n)
+{
+	uint32_t magic10 = 0x1999999a;
+	struct qdiv result;
+
+	__asm__(
+		"dmuls.l %1, %2		\n\t"
+		"sts     mach, %0	"
+		: "=r"(result.q)
+		: "r"(n), "r"(magic10)
+		: "macl", "mach"
+	);
+
+	result.r = n - 10 * result.q;
+	return result;
+}
+
+/* init_version() -- get a version string */
+const char *init_version(void)
+{
+	static char data[14];
+	uint32_t s = (uint32_t)&GINT_VERSION;
+
+	/* Force the string constant to reside in ROM because we haven't
+	   initialized the data section yet */
+	memcpy(data, "gint #0.0-000", 14);
+
+	/* Quickly get the three digits of the build number */
+	struct qdiv x = qdiv10(s & 0xffff);
+	struct qdiv y = qdiv10(x.q);
+
+	data[5]   = (s & 0xff000000) >> 24;
+	data[6]  += ((s & 0x00f00000) >> 20);
+	data[8]  += ((s & 0x000f0000) >> 16);
+	data[10] += y.q;
+	data[11] += y.r;
+	data[12] += x.r;
+
+	return data;
+}
+
+/* init_stage() -- change the current init stage */
+void init_stage(const char *name)
+{
+	drect(85, 0, 127, 7, color_white);
+	print(15, 1, name);
+}
+
+/* init_halt() -- halt the program */
+void init_halt(void)
+{
+	while(1) sleep();
+}
+
+/* print_dec() -- print a number in base 10 */
+void print_dec(int x, int y, int n, int digits)
+{
+	char str[20];
+	str[digits] = 0;
+
+	while(--digits >= 0)
+	{
+		struct qdiv d = qdiv10(n);
+		str[digits] = '0' + d.r;
+		n = d.q;
+	}
+
+	print(x, y, str);
+}
+
+/* print_hex() -- print a number in base 16 */
+void print_hex(int x, int y, uint32_t n, int digits)
+{
+	char str[20];
+	str[digits] = 0;
+
+	while(--digits >= 0)
+	{
+		str[digits] = (n & 0xf) + '0' + 39 * ((n & 0xf) > 9);
+		n >>= 4;
+	}
+
+	print(x, y, str);
+}
diff --git a/src/keyboard/getkey.c b/src/keyboard/getkey.c
index 1fc3eb1..f75d086 100644
--- a/src/keyboard/getkey.c
+++ b/src/keyboard/getkey.c
@@ -16,7 +16,9 @@ int getkey(void)
 		getkey_shift_modifier		|
 		getkey_alpha_modifier		|
 		getkey_manage_backlight		|
+#ifndef GINT_NO_SYSCALLS
 		getkey_task_switch		|
+#endif
 		getkey_repeat_arrow_keys,
 
 		0
@@ -105,12 +107,14 @@ int getkey_opt(getkey_option_t options, int delay_ms)
 		break;
 
 	case event_key_release:
+#ifndef GINT_NO_SYSCALLS
 		if((options & getkey_task_switch) && event.key.code == KEY_MENU
 			&& !modifier)
 		{
 			gint_switch();
 			continue;
 		}
+#endif
 
 		if((int)event.key.code != last_key) break;
 		last_key	= KEY_NONE;
diff --git a/src/keyboard/keyboard_core.c b/src/keyboard/keyboard_core.c
index 6e956f4..530b5fc 100644
--- a/src/keyboard/keyboard_core.c
+++ b/src/keyboard/keyboard_core.c
@@ -34,45 +34,6 @@ timer_t *vtimer = NULL;
 //	Interrupt management.
 //---
 
-static inline void push_press(int keycode)
-{
-	uint32_t id = key_id(keycode);
-
-	event_t event = {
-		.type		= event_key_press,
-		.key.code	= keycode,
-		.key.id		= id,
-		.key.character	= key_char(keycode),
-	};
-	event_push(event);
-}
-
-static inline void push_repeat(int keycode)
-{
-	uint32_t id = key_id(keycode);
-
-	event_t event = {
-		.type		= event_key_repeat,
-		.key.code	= keycode,
-		.key.id		= id,
-		.key.character	= key_char(keycode),
-	};
-	event_push(event);
-}
-
-static inline void push_release(int keycode)
-{
-	uint32_t id = key_id(keycode);
-
-	event_t event = {
-		.type		= event_key_release,
-		.key.code	= keycode,
-		.key.id		= id,
-		.key.character	= key_char(keycode),
-	};
-	event_push(event);
-}
-
 /*
 	keyboard_interrupt()
 	Callback function for keyboard update; called by the timer manager when
diff --git a/src/keyboard/multigetkey.c b/src/keyboard/multigetkey.c
deleted file mode 100644
index 74f9b6c..0000000
--- a/src/keyboard/multigetkey.c
+++ /dev/null
@@ -1,54 +0,0 @@
-#include <keyboard.h>
-#include <internals/keyboard.h>
-#include <events.h>
-
-/*
-	multigetkey()
-	Listens the keyboard for simultaneous key hits. Uses the same options
-	as getkey_opt().
-	multigetkey() fills the 'keys' array with 'count' key codes, adding
-	KEY_NOKEY if less than 'count' keys are pressed.
-	Be aware that rectangle and column effects can make multigetkey() read
-	unpressed keys as pressed (see documentation for more information).
-	Setting count = 3 is generally safe.
-	The function returns after 'max_cycles' if no key is pressed.
-*/
-static void multigetkey_wait(int *cycles)
-{
-	while(!interrupt_flag) sleep();
-	interrupt_flag = 0;
-
-	if(*cycles > 0) (*cycles)--;
-}
-void multigetkey(int *keys, int count, int cycles)
-{
-	event_t event;
-	int number = 0;
-
-	if(count <= 0) return;
-	if(cycles <= 0) cycles = -1;
-
-	while(cycles != 0)
-	{
-		number = getPressedKeys(keyboard_state, keys, count);
-
-		// We want to update the last key data when multigetkey()
-		// returns a single key, because getkey() could be called a
-		// short time after we return, and send a new event for this
-		// key.
-		if(number == 1)
-		{
-			last_key = keys[0];
-			last_repeats = 0;
-			last_time = 0;
-		}
-
-		if(number) break;
-		multigetkey_wait(&cycles);
-	}
-
-	do event = pollevent();
-	while(event.type != event_none);
-
-	return;
-}
diff --git a/src/stdlib/free.c b/src/stdlib/free.c
index b51d876..b967fda 100644
--- a/src/stdlib/free.c
+++ b/src/stdlib/free.c
@@ -3,7 +3,7 @@
 #pragma GCC diagnostic ignored "-Wunused-parameter"
 
 #ifndef	GINT_NO_SYSCALLS
-void __free(void *ptr);
+#include <internals/syscalls.h>
 #endif
 
 /*
@@ -12,6 +12,9 @@ void __free(void *ptr);
 */
 void free(void *ptr)
 {
+	// Just to be sure.
+	if(!ptr) return;
+
 	#ifndef	GINT_NO_SYSCALLS
 	__free(ptr);
 	#endif
diff --git a/src/stdlib/malloc.c b/src/stdlib/malloc.c
index 92366bc..3b7724a 100644
--- a/src/stdlib/malloc.c
+++ b/src/stdlib/malloc.c
@@ -7,8 +7,8 @@
 */
 
 #ifndef	GINT_NO_SYSCALLS
+#include <internals/syscalls.h>
 
-void *__malloc(size_t size);
 void *malloc(size_t size)
 {
 	return __malloc(size);
diff --git a/src/stdlib/realloc.c b/src/stdlib/realloc.c
index b98530e..7c30537 100644
--- a/src/stdlib/realloc.c
+++ b/src/stdlib/realloc.c
@@ -6,8 +6,8 @@
 */
 
 #ifndef	GINT_NO_SYSCALLS
+#include <internals/syscalls.h>
 
-void *__realloc(void *ptr, size_t size);
 void *realloc(void *ptr, size_t size)
 {
 	return __realloc(ptr, size);
diff --git a/src/tales/tales_internals.c b/src/tales/tales_internals.c
index 889fd7a..3607d0d 100644
--- a/src/tales/tales_internals.c
+++ b/src/tales/tales_internals.c
@@ -4,17 +4,10 @@
 #include <ctype.h>
 #include <gray.h>
 
-font_t *font = NULL;
-color_t operator;
-
-/*
-	tales_init()
-	Configures tales with the default font (which is part of gint).
-*/
-void tales_init(void)
-{
-	text_configure(NULL, color_black);
-}
+/* Put these in gint's uninitialized bss section so that text rendering can be
+   used before the library is fully initialized */
+__attribute__((section(".gint.bss"))) font_t *font = NULL;
+__attribute__((section(".gint.bss"))) color_t operator;
 
 /*
 	getCharacterIndex()
diff --git a/version b/version
index 18bb01c..96648ab 100644
--- a/version
+++ b/version
@@ -1 +1 @@
-beta-0.9-410
+beta-0.9-566