mirror of https://github.com/snes9xgit/snes9x.git
102 lines
2.4 KiB
Plaintext
102 lines
2.4 KiB
Plaintext
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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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;*******************************************************
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; InitReg Initializes Registers
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;*******************************************************
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%macro setreg 2
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mov edi,%1
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add edi,[regptr]
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mov eax,%2
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mov [edi],eax
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%endmacro
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;*******************************************************
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; Registers Note : Remember to restore AH, ECX, & DX
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;*******************************************************
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%macro checkmultchange 0
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; execute multiplication
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cmp byte[multchange],0
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je .nomult
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push edx
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push eax
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xor bh,bh
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mov bl,[mode7B+1]
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mov ax,[mode7A]
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test bl,80h
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jz .noneg
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mov bh,0FFh
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.noneg
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imul bx
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mov [compmult],ax
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mov [compmult+2],dl
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pop eax
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pop edx
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mov byte[multchange],0
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.nomult
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%endmacro
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%macro mouse4016doxA 2
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cmp byte[JoyAPos],%1
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jne .nx7
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mov bx,[mousexpos]
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shr bx,%2
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and bx,1
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mov al,bl
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.nx7
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%endmacro
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%macro mouse4016doyA 2
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cmp byte[JoyAPos],%1
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jne .ny7
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mov bx,[mouseypos]
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shr bx,%2
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and bx,1
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mov al,bl
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.ny7
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%endmacro
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%macro mouse4017dox 2
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cmp byte[JoyBPos],%1
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jne .nx7
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mov bx,[mousexpos]
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shr bx,%2
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and bx,1
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mov al,bl
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.nx7
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%endmacro
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%macro mouse4017doy 2
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cmp byte[JoyBPos],%1
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jne .ny7
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mov bx,[mouseypos]
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shr bx,%2
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and bx,1
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mov al,bl
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.ny7
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%endmacro
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