mirror of https://github.com/snes9xgit/snes9x.git
93 lines
2.2 KiB
NASM
93 lines
2.2 KiB
NASM
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; Snes9x - Portable Super Nintendo Entertainment System (TM) emulator.
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;
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; Super FX assembler emulator code
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; (c) Copyright 1998, 1999 zsKnight and _Demo_.
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;
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; Permission to use, copy, modify and distribute Snes9x in both binary and
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; source form, for non-commercial purposes, is hereby granted without fee,
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; providing that this license information and copyright notice appear with
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; all copies and any derived work.
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;
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; This software is provided 'as-is', without any express or implied
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; warranty. In no event shall the authors be held liable for any damages
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; arising from the use of this software.
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;
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; Snes9x is freeware for PERSONAL USE only. Commercial users should
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; seek permission of the copyright holders first. Commercial use includes
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; charging money for Snes9x or software derived from Snes9x.
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;
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; The copyright holders request that bug fixes and improvements to the code
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; should be forwarded to them so everyone can benefit from the modifications
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; in future versions.
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;
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; Super NES and Super Nintendo Entertainment System are trademarks of
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; Nintendo Co., Limited and its subsidiary companies.
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;
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; ZSNES SuperFX emulation code and wrappers
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; (C) Copyright 1997-8 zsKnight and _Demo_
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; Used with the kind permission of the copyright holders.
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;
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%include "macros.mac"
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EXTSYM InitC4, C4RegFunction, C4ReadReg, C4WriteReg
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EXTSYM romdata
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[BITS 32]
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SECTION .data
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NEWSYM C4Ram, dd 0
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NEWSYM C4RamR, dd 0
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NEWSYM C4RamW, dd 0
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NEWSYM pressed, dd 0 ; used by C4Edit (unused function)
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NEWSYM vidbuffer,dd 0 ; used by C4Edit
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NEWSYM oamram, times 544 db 0 ; Sprite PPU data used by C4 routines
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;
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; Snes9x wrapper functions for the zsnes C4 code
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; (C) Copyright 2000 Gary Henderson
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SECTION .data
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EXTSYM ROM,RegRAM
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SECTION .text
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NEWSYM S9xInitC4
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pushad
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mov eax,dword[ROM]
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mov dword[romdata],eax
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call InitC4
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; mov eax,dword[RegRAM]
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; add eax,06000h
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; mov dword[C4Ram],eax
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popad
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ret
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NEWSYM S9xSetC4
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NEWSYM S9xSetC4RAM
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mov ecx, dword[esp+8]
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mov eax, dword[esp+4]
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and ecx, 0ffffh
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push ebx
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push esi
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push edi
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push ebp
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sub ecx, 6000h
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call C4RegFunction
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pop ebp
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pop edi
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pop esi
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pop ebx
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ret
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NEWSYM S9xGetC4
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NEWSYM S9xGetC4RAM
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mov ecx, dword[esp+4]
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xor eax, eax
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and ecx, 0ffffh
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sub ecx, 06000h
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jmp C4ReadReg
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