mirror of
https://github.com/mauiaaron/apple2.git
synced 2025-01-14 03:30:53 +00:00
32b4cd48c4
* fixes a bug where op_BRK doesn't work when Mockingboard installed
* this is still hackish and hardcoded ... ultimately we need an interface to add/remove virtual peripherals
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/*
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* Apple // emulator for Linux: Glue file prologue for Intel 386
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*
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* Copyright 1994 Alexander Jean-Claude Bottema
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* Copyright 1995 Stephen Lee
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* Copyright 1997, 1998 Aaron Culliney
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* Copyright 1998, 1999, 2000 Michael Deutschmann
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*
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* This software package is subject to the GNU General Public License
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* version 2 or later (your choice) as published by the Free Software
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* Foundation.
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*
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* THERE ARE NO WARRANTIES WHATSOEVER.
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*
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*/
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#define __ASSEMBLY__
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#include "apple2.h"
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#include "misc.h"
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#define GLUE_FIXED_READ(func,address) \
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E(func) movb SN(address)(%edi),%al; \
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ret;
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#define GLUE_FIXED_WRITE(func,address) \
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E(func) movb %al,SN(address)(%edi); \
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ret;
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#define GLUE_BANK_MAYBEREAD(func,pointer) \
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E(func) testl $SS_CXROM, SN(softswitches); \
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jnz 1f; \
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call *SN(pointer); \
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ret; \
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1: addl SN(pointer),%edi; \
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movb (%edi),%al; \
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subl SN(pointer),%edi; \
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ret;
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#define GLUE_BANK_READ(func,pointer) \
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E(func) addl SN(pointer),%edi; \
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movb (%edi),%al; \
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subl SN(pointer),%edi; \
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ret;
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#define GLUE_BANK_WRITE(func,pointer) \
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E(func) addl SN(pointer),%edi; \
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movb %al,(%edi); \
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subl SN(pointer),%edi; \
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ret;
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#define GLUE_BANK_MAYBEWRITE(func,pointer) \
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E(func) addl SN(pointer),%edi; \
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cmpl $0,SN(pointer); \
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jz 1f; \
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movb %al,(%edi); \
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1: ret;
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// TODO FIXME : implement CDECL prologue/epilogues...
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#define GLUE_C_WRITE(func) \
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E(func) pushl %eax; \
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pushl %ecx; \
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pushl %edx; \
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andl $0xff,%eax; \
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pushl %eax; \
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pushl %edi; \
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call SN(c_##func); \
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popl %edx; /* dummy */ \
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popl %edx; /* dummy */ \
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popl %edx; \
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popl %ecx; \
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popl %eax; \
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ret; \
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// TODO FIXME : implement CDECL prologue/epilogues...
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#define GLUE_C_READ(func) \
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E(func) /*pushl %eax;*/ \
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pushl %ecx; \
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pushl %edx; \
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pushl %edi; \
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call SN(c_##func); \
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/*movb %al,12(%esp);*/ \
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popl %edx; /* dummy */ \
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popl %edx; \
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popl %ecx; \
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/*popl %eax;*/ \
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ret;
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