70 lines
1.5 KiB
NASM
70 lines
1.5 KiB
NASM
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.286p
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include cmacros.inc
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?WIN=1 ; Use Windows prolog/epilog
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?PLM=1 ; Use PASCAL calling convention
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externW __ahincr
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sBegin CODE ;INIT_TEXT
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assumes cs,CODE ;INIT_TEXT
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assumes ds,DATA
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cProc HugeOffset,<NEAR, PUBLIC>
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parmD pSrc
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parmD cb
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cBegin
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mov ax, SEG_cb
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mov dx, ax
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mov ax, OFF_pSrc
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add ax, OFF_cb ;add src offset and bytecount
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adc dx, 0 ;dx = # segments to increment
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mov cx, ax ;save new offset
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mov ax, dx ;#segs into ax
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lea bx, __ahincr
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mul bx ;__ahincr ;mul by windows magic #
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mov dx, ax ;restore to dx for output
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mov ax, cx ;restore for output
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add dx, SEG_pSrc
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cEnd
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ifdef DEBUG
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cProc StkTrace,<NEAR, PUBLIC>
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parmW cFrames
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parmD lpBuf
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cBegin
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push es
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mov cx, cFrames
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mov bx, bp
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les di, lpBuf
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cld
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x:
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mov bx, ss:[bx]
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and bx, 0FFFEh
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mov ax, ss:[bx+2]
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stosw
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loopnz x
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pop es
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cEnd
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endif
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?WIN=0 ; turn off windows prolog/epilog stuff
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;
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; SwitchDS
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;
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; Routine to switch the DS to word argument
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; Called from C but without C DS glue.
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;
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cProc SwitchDS,<NEAR, PUBLIC>
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parmW newDS
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cBegin
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mov ax,ds ; old DS is return value
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mov ds,newDS
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cEnd
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sEnd CODE ;INIT_TEXT
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end
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