123 lines
3.7 KiB
Plaintext
123 lines
3.7 KiB
Plaintext
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Graph35+EII 0S30.00.2200 - Globals list
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SuperH __fast call note:
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-> arguments must be passed using r0, r1 and r2 registers
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-> r3 must be saved before involving the function
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-> used by the syscall 0xfe0 __fast_strcpy() and some Bfile internal function
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Usefull function (not syscall):
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0x8004d218 - uint32_t atomic_start() (return old SR register and set up the SR.BL bit)
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0x8004d276 - redirect to atomic_start()
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0x801e0f94 - wrapper of syscall 0xf98 (__fast_strcpy()) (probably to use the __fast superh procedure).
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0x801e1f80 - ascii_to_bfile() - copy ASCII string into Bfile string (uint16_t)
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0x80267c78 - USB interrupt handler
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0x88007cb4 - USB pointer table of functions (47 functions)
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0x8026954c - int USB_check_interrupts(void) (check any interrupt)
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Casio's globals:
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#---
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# Fugue / Bfile
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#---
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0x8801071c - Fugue / Bfile mount table for all device (only one slot for the ROM) (52 bytes)
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struct fs_control {
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void *free_buffer; (0x880135f8)
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uint32_t structure_id_0; (alway 0x00000002?)
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uint32_t structure_id_1; (alway 0x00000001?)
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char device_name[5]; ("fls0")
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uint8_t unknown[16]; (used for file handle?)
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char separator[2]; ("\")
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uint8_t unknown[14]; (used for file handle?)
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uint32_t handle_mark; (not sure, 0x01000000 (used by the handle to distingish ROM / SD))
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}
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0x880107d8 - Used like internal buffer to store path (Fugue?)
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0x8800c2ac - Mutex for ???? (Fugue?)
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0x8022d448 - ???? (Fugue?)
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0x801e0d8c - Pointer table (17 functions) (used by Bfile during initialization state)
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0x8022229c - Some path used to generate internal Fugue FS tree (?)
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#---
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# SD Card
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#---
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0xfd802ab4 - SD Card device validity (0=no, otherwise yes)
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0xfd802a30 - SD Card device validity (0=no, otherwise yes)
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#---
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# USB software driver:
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#---
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0x88004b78 - ????? (used at <e92a>)
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0x88009578 - ????? (used at <266470> and <269fb0>)
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0x88007b70 - used by the software driver to set arg (USB driver state ?) like: 1800000[1/2/3/4/5/6/7]
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-> used to indicate USB driver state ?
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-> used to configure one register of the USB hardware module ?
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0x8800b840 - function pointer for the USB interrupt handler (0x80267c78)
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0x8800b844 - argument pointer for the USB interrupt handler (0x88007d50)
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0x8800b848 - ????? (used at <266470>, check if == 1)
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0x8800b86c - used by the USB timer handler to check initialization validity (?)
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0x8800b868 - ?????
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0x8800c2d4 - Indicate if any communication is used (serial or USB)
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0x8800c2d6 - Content the currently selected comminication mode (0=serial, 1=USB)
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0x8800c2d8 - unknown (set to 1 by the syscall 0x29b)
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struct comm_info_s
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{
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uint16_t used; // 0=no, other yes
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uint16_t type; // 0=SERIAL, 1=USB
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uint16_t unknown; // syscall 0x29b set to 1
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};
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0x8800c388 - USB hardware initialisation state ?
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0x8800c38c - ?????
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0x88013354 - USB structure entry: (undocumented yet)
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-> set to 0x00000000 by the syscall USB_close()
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0x8026a690 - Some string used by the USB drivers ("KSL")
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#---
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# Applications
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#---
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0x8024367c - LINK Fkey remap data (6 entries)
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USB notes:
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-> Casio's use undocumented register 0xa4d800c2
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-> Casio's use the timer 4 to generate USB interrupt (see USB_Close())
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-> Casio's use hardware USB module interrupt
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-> Casio's use DMA channel 4
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-> Casio's vendor ID: "Casio Computer Co., Ltd" (0x07cf)
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-> Casio's product ID: "fx-CP400" (0x6102)
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-> use BULK transfert.
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Based on the `CPU7305.dll`: register list:
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0x00000000 XTAL_USB (USB frequency)
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0xa4150014 USBCLKCR (USB Clock control)
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USB 2 control
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App note:
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Fkey remap structure:
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struct fkey_remap {
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struct {
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uint16_t ID; // ICON id, used by the syscall 0x4b0
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uint16_t validity; // always 0x0002
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} icon;
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struct {
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uint16_t validity; // always 0x0000
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uint16_t returned; // returned value when when fkey is pressed
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} fkey;
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};
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