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118 lines
2.1 KiB
118 lines
2.1 KiB
title OS2_STUB - OS/2 Simulation routines for DOS 3
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; These routines simulate family API routines for DOS 3
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;
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; Routines which are never called under DOS 3 just return
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; popping the parameters.
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;
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; 87/04/24 SKS DOSGETMACHINEMODE stores a Byte, not a Word!
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;
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memL=1 ; simulate large model for returns
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?PLM=1 ; pascal calling conventions
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?WIN=0 ; no Windows
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.xlist
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include cmac_mrt.inc ; old, customized masm510 cmacros
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.list
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include msdos.inc
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sBegin code
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assumes cs,code
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; __DOSDEVCONFIG - return 8087/80287 indicator
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cProc __DOSDEVCONFIG,<PUBLIC>,<ES,BX>
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parmDP devinfo
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parmW devitem
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parmW reserved
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cbegin
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les bx,devinfo
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mov word ptr es:[bx],1 ; assume have 287
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xor ax,ax ; return no error
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cend
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; __DOSGETMACHINEMODE - return real mode indicator
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cProc __DOSGETMACHINEMODE,<PUBLIC>,<ES,BX>
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parmDP mode
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cbegin
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les bx,mode
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xor ax,ax ; ax = return code and mode
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mov es:[bx],al ; set machine mode to real
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cend
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; __DOSSETVEC - never called under DOS 3.x
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cProc __DOSSETVEC,<PUBLIC>,<>
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parmDP oldaddr
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parmDP newaddr
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parmW vecnum
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cbegin
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cend
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; __DOSCREATECSALIAS
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cProc __DOSCREATECSALIAS,<PUBLIC>,<ES,BX>
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parmW dataseg
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parmDP csalias
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cbegin
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mov ax,dataseg
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les bx,csalias
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mov es:[bx],ax ; use dataseg value
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cend
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; __DOSFREESEG - never called from DOS 3.x
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cProc __DOSFREESEG,<PUBLIC>,<>
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parmW dataseg
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cbegin
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cend
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; __DOSWRITE - stripped-down version called from emulator for no87 message
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; - note that there is no error detection in this version
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; - since the emulator doesn't check for write errors anyway
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cProc __DOSWRITE,<PUBLIC>,<ds> ; <di> commented out
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parmW handle ; unsigned
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parmD p_buffer ; char far *
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parmW bytestowrite ; unsigned
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parmD p_byteswritten ; unsigned far *
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; returns unsgined
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cbegin
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mov cx,bytestowrite
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mov bx,handle
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lds dx,p_buffer
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callos write
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; jc wrtret ; if write error, error code already in AX
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; ; if no error, set bytes written
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; les di,p_byteswritten
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; mov word ptr es:[di],ax
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xor ax,ax ; if no error, clear return code
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;wrtret:
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cend
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sEnd code
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end
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