97 lines
3.8 KiB
C
97 lines
3.8 KiB
C
#ifndef _shared_dict_snes_h
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#define _shared_dict_snes_h
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//define dictionary's reference number in the shared_dictionaries.h file
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//then include this dictionary file in shared_dictionaries.h
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//The dictionary number is literally used as usb transfer request field
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//the opcodes and operands in this dictionary are fed directly into usb setup packet's wValue wIndex fields
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//=============================================================================================
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//=============================================================================================
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// SNES DICTIONARY
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//
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// opcodes contained in this dictionary must be implemented in firmware/source/snes.c
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//
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//=============================================================================================
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//=============================================================================================
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// OPCODES with no operand and no return value besides SUCCESS/ERROR_CODE
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//=============================================================================================
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// OPCODES WITH OPERAND and no return value besides SUCCESS/ERROR_CODE
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//=============================================================================================
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// Detect this opcode/operand setup with opcode between the following defines:
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#define SNES_OPCODE_24BOP_MIN 0x00
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#define SNES_OPCODE_24BOP_MAX 0x7F
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//
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//=============================================================================================
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//=============================================================================================
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//SNES has 24bit address bus which is max operands we can send
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//So have to get a little creative for writing to 24bit address
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//prob easiest to just keep last latched value of A23-16
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//write to SNES in program mode (/RESET low)
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//only can send A15-A0
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//A23-16 are last latched values
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//SNES /ROMSEL always goes low
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//program writes don't allow access to SRAM
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//program access aligns ROM linearly and is independent of Hi/Lo switch
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#define SNES_A15_A0_PRGM_WR 0x00
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//write to SNES in play mode (/RESET high)
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//only can send A15-A0
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//A23-16 are last latched values
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//SNES /ROMSEL always goes low
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//play writes allow access to SRAM
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//program access aligns ROM based on position of Hi/Lo switch
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#define SNES_A15_A0_PLAY_WR 0x01
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//write to SNES in play mode (/RESET high)
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//only can send A15-A0
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//A23-16 are last latched values
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//SNES /ROMSEL not affected
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//play writes allow access to SRAM
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//program access aligns ROM based on position of Hi/Lo switch
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#define SNES_A15_A0_NO_ROMSEL_PLAY_WR 0x02
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//=============================================================================================
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// OPCODES WITH OPERAND 8bit RETURN VALUE plus SUCCESS/ERROR_CODE
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//=============================================================================================
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// Detect this opcode/operand setup with opcode between the following defines:
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#define SNES_OPCODE_24BOP_8BRV_MIN 0x80
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#define SNES_OPCODE_24BOP_8BRV_MAX 0xFF
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//
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//=============================================================================================
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//=============================================================================================
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//can supply entire 24bit address
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//write to SNES in program mode (/RESET low)
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//SNES /ROMSEL always goes low
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//program reads don't allow access to SRAM
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//program access aligns ROM linearly and is independent of Hi/Lo switch
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#define SNES_PRGM_RD 0x80
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//write to SNES in play mode (/RESET high)
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//SNES /ROMSEL always goes low
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//play reads allow access to SRAM
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//program access aligns ROM based on position of Hi/Lo switch
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#define SNES_PLAY_RD 0x81
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//write to SNES in play mode (/RESET high)
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//SNES /ROMSEL not active
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//play reads allow access to SRAM
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//program access aligns ROM based on position of Hi/Lo switch
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#define SNES_NO_ROMSEL_PLAY_RD 0x82
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#endif
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