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315 lines
5.9 KiB
315 lines
5.9 KiB
subttl emulator.inc - Emulator macros.
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;***
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;emulator.inc - Emulator history.
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;
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; Copyright (c) 1989-89, Microsoft Corporation
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;
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;Purpose:
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; Defines macros for emulator.
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;
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;Revision History
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;
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; See emulator.hst
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;
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;*******************************************************************************
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;*******************************************************************************
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;
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; EMver - defines version tag put in code segment.
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;
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;*******************************************************************************
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EMver macro
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db 'MSEM87',major_ver,minor_ver
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endm
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;*******************************************************************************
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;
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; Define pub and glb macros to make labels public for debugging.
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;
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;*******************************************************************************
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ifdef DEBUG
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lab macro name
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public name
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name:
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endm
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pub macro name
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public name
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name:
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endm
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glb macro name
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irp nm,<name>
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public nm
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endm
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endm
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elseifdef WINDOWS ; If windows, make these public for the map file.
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lab macro name
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public name
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name:
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endm
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pub macro name
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public name
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name:
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endm
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glb macro name
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irp nm,<name>
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public nm
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endm
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endm
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else ;DEFAULT
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lab macro name
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name:
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endm
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pub macro name
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name:
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endm
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glb macro name
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endm
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endif ;DEFAULT
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;*******************************************************************************
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;
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; Macros and register aliases to keep the 386/8086 versions close.
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;
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;*******************************************************************************
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ifdef i386
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eWORD macro nam ; 386 macros
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nam label dword
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endm
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nedw macro nam,contents
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nam dd contents
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endm
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nedd macro nam,contents
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nam df contents
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endm
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edw macro contents
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dd contents
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endm
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edd macro contents
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df contents
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endm
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else ; not i386
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eWORD macro nam ; 286 macros
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nam label word
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endm
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nedw macro nam,contents
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nam dw contents
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endm
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nedd macro nam,contents
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nam dd contents
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endm
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edw macro contents
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dw contents
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endm
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edd macro contents
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dd contents
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endm
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eax equ ax
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ecx equ cx
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edx equ dx
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ebx equ bx
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esp equ sp
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ebp equ bp
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esi equ si
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edi equ di
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iretd equ iret
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endif ;not i386
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;*******************************************************************************
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;
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; Processor opcode byte definitions.
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;
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;*******************************************************************************
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fINT equ 0cdh
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fFWAIT equ 9bh
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fESCAPE equ 0d8h
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iNOP equ 90h ; byte nop
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fES equ 26h ; segment prefix opcodes
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fCS equ 2eh
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fSS equ 36h
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fDS equ 3eh
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bIRET equ 0cfh ; "iret"
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bRETF equ 0cah ; first byte of "retf 2". Followed by word operand.
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wNOP equ 0c08bh ; word nop. "mov ax, ax"
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bEscMask equ 0f8h ; masks all bits but escape
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bMOD equ 0c0h ; MOD bits are the two highest bits
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bRM equ 7h ; R/M bits are the three lowest bits.
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;*******************************************************************************
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;
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; Define os2extrn and os2call for dual mode emulators
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;
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;*******************************************************************************
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ifdef DOS3and5
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os2call macro name
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call __&name
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endm
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os2extrn macro name
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extrn __&name : far
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endm
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endif ;DOS3and5
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ifdef DOS5only
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os2call macro name
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call name
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endm
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os2extrn macro name
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extrn name : far
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endm
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endif ;DOS5only
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;*******************************************************************************
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;
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; Define ProfBegin ProfEnd macros for when profiling emulator.
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;
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;*******************************************************************************
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ProfBegin macro name
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ifdef PROFILE
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nop
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public EM_&name&_BEGIN
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EM_&name&_BEGIN label far
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endif
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endm
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ProfEnd macro name
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ifdef PROFILE
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public EM_&name&_END
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EM_&name&_END label far
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nop
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endif
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endm
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;*******************************************************************************
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;
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; Define IntDOS macro for handling "int 21h" and "call DOS3CALL".
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;
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;*******************************************************************************
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IntDOS macro
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ifdef WINDOWSP
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call DOS3CALL
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else
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int 21h
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endif
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endm
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;*******************************************************************************
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;
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; Define constants for DOS int 21h
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;
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;*******************************************************************************
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DOS_getvector equ 35H
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INT_GetEquipList equ 11h ; PC BIOS equipment list call.
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GEL_80x87 equ 2h ; Mask for Coprocessor sense switch.
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;*******************************************************************************
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;
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; Define structures for __WinInfo(), __WinSave(), and __WinRestore().
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;
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;*******************************************************************************
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WinInfoStruct struc
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WI_Version dw ? ; High byte is major version.
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WI_SizeSaveArea dw ? ; Size of save area.
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WI_WinDataSeg dw ?
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WI_WinCodeSeg dw ?
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WI_Have80x87 dw ?
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WI_Unused dw ? ; Coprocessor type will go here.
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WinInfoStruct ends
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Size80x87Area equ 94
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WinSaveArea struc
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WSA_Save80x87 db Size80x87Area dup(?) ; Where 80x87 info will go.
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WSA_SaveEm db ? ; Where emulator data will go.
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WinSaveArea ends
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;*******************************************************************************
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;
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; Define constants for checking "extrn __WINFLAGS:asb"
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;
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;*******************************************************************************
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WF_PMODE equ 1
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WF_CPU286 equ 2
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WF_CPU386 equ 4
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WF_WIN286 equ 10h
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WF_WIN386 equ 20h
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WF_80x87 equ 400h
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