Alternative library and kernel for add-in development on fx-9860G and fx-CG50 under Linux.
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Crucial, missing things.
! core: the four basic memory functions
! core: build an exception handler and a TLB miss handler
! core: gint_switch() (driver contexts on stack; arbitrary code?)
! bopti: fxcg50 version
! syscalls: fxcg50 BFile calls
! gray: the gray engine on fx9860g
Tests to run.
* core: run the alignment/size automated tests for memory functions
* bopti: more sizes, gray
* topti: all charsets, colors
Complementary elements on existing code.
* dma: dma_memcpy() and dma_memset(), possibly requiring alignment
* core: use topti in the error message for missing mappings
* core: find the #ifdef FX9860G|FXCG50 that have a cross-platform def
* topti: support Unicode fonts
* hardware: fill in the HWMEM_FITTLB flag
* keyboard: think of extended functions
* cpg: spread spectrum on fxcg50
* bopti: blending modes for monochrome bitmaps (use topti assembler)
* display: use more of topti's assembler in drect()
* core: use cmp/str for memchr()
* timer: try putting addresses in <gint/mpu/tmu.h>
* r61524: brightness control and clean the file
Keep in mind.
* prizm: don't hardcode stack address in fxcg50.ld
* prizm: detect P1 static RAM (stack) in TLB
* core: prove and use qdiv10() instead of __sdivsi3
* setjmp: more registers may need to be saved
* core: free heap when a task-switch results in leaving the app
* core: save and restore interrupt masks
* timer: make sure ETMU interrupts are disabled in ctx_restore()
* core: document the SH7305 PFC in <gint/mpu/pfc.h>
Future directions.
* A complete file system abstraction
* Integrate overclock management
* Audio playback using Martin Poupe's method
* Serial communication [SCIF] [SCIFA]
* USB communication [USB]
* Driver for the watchdog timer [WDT] [SH7705]