62 lines
1.3 KiB
NASM
62 lines
1.3 KiB
NASM
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;
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;
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; Copyright (C) Microsoft Corporation, 1986
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;
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; This Module contains Proprietary Information of Microsoft
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; Corporation and should be treated as Confidential.
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;
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subttl emxenix.asm - XENIX function jump tables and Initialization
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page
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public __eminit, __emulate, __87exception
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org 10h
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__eminit: ; UNDONE - not used any more
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org 15h
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__emulate:
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jmp protemulation ; protect mode emulation
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org 1Ah
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__87exception:
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pop eax ; eax = error code
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int 0FFh
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page
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;------------------------------------------------------------------------------
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;
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; install emulator (initial all data elements
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;
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; This routine is executed once for the 1st emulated instruction
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;
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;------------------------------------------------------------------------------
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pub installemulator
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mov [Einstall],1 ; mark emulator as initialized
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mov eax,offset BEGstk ; pointer to beginning of stack
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mov [BASstk],eax ; set base of stack
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mov [CURstk],eax ; set current stack element
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mov eax,offset ENDstk-Reg87Len
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mov [LIMstk],eax ; set end of stack
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mov ax,InitControlWord
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mov [UserControlWord],ax ; initialize control words
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mov [ControlWord],ax
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xor eax,eax
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mov [UserStatusWord],ax ; initialize status words
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mov [StatusWord],ax
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jmp protemcont ; continue emulating 1st instruction
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