159 lines
3.6 KiB
NASM
159 lines
3.6 KiB
NASM
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include isvbop.inc
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.286
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.model medium,pascal
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_DATA segment word public 'DATA'
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Old2fHandler dd ?
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Old73Handler dd ?
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VddHandle dw -1
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DllName db "VWIPXSPX.DLL",0
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InitFunc db "VwInitialize",0
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DispFunc db "VwDispatcher",0
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_DATA ends
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INIT_TEXT segment byte public 'CODE'
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assume cs:INIT_TEXT
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GrabInterrupts proc far
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pusha
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push ds
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push es
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push _DATA
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pop ds
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assume ds:_DATA
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push ds
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pop es
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mov si,offset DllName ; ds:si = library name
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mov di,offset InitFunc ; es:di = init function name
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mov bx,offset DispFunc ; ds:bx = dispatcher function name
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RegisterModule ; returns carry if problem
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jc @f
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mov VddHandle,ax
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mov ax,352fh
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int 21h
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mov word ptr Old2fHandler,bx
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mov word ptr Old2fHandler+2,es
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ifdef NEC_98
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mov ax,3513h
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else ; NEC_98
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mov ax,3573h
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endif ; NEC_98
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int 21h
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mov word ptr Old73Handler,bx
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mov word ptr Old73Handler+2,es
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push seg PmIpx2fHandler
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pop ds
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assume ds:nothing
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mov dx,offset PmIpx2fHandler
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mov ax,252fh
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int 21h
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mov dx,offset PmIpx73Handler
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ifdef NEC_98
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mov ax,2513h
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else ; NEC_98
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mov ax,2573h
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endif ; NEC_98
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int 21h
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@@: pop es
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pop ds
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popa
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ret
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GrabInterrupts endp
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INIT_TEXT ends
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_TEXT segment byte public 'CODE'
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assume cs:_TEXT
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public PmIpx2fHandler
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PmIpx2fHandler proc
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cmp ax,1684h
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jne @f
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cmp bx,200h
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jne @f
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push cs
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pop es
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mov di,offset PmIpxEntryPoint
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iret
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@@: push bp
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mov bp,sp
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push ax
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push ds
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mov ax,_DATA
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mov ds,ax
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assume ds:_DATA
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push word ptr Old2fHandler+2
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push word ptr Old2fHandler
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mov ds,[bp-4]
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mov ax,[bp-2]
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mov bp,[bp]
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retf 6
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PmIpx2fHandler endp
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public PmIpx73Handler
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PmIpx73Handler proc
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push ds
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push es
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pusha
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mov bx,_DATA
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mov ds,bx
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assume ds:_DATA
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mov ax,VddHandle
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mov bx,-2
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DispatchCall ; get ECB
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jc @f
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call dword ptr es:[si][4] ; branch to the ESR
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mov al,20h
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ifdef NEC_98
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out 08h,al ; clear slave pic
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out 00h,al ; " master "
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else ; NEC_98
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out 0a0h,al ; clear slave pic
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out 20h,al ; " master "
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endif ; NEC_98
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popa
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pop es
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pop ds
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assume ds:nothing
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iret
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@@: popa
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pop es
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push bp
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mov bp,sp
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push _DATA
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pop ds
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assume ds:_DATA
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push word ptr Old73Handler+2
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push word ptr Old73Handler
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mov ds,[bp+2]
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assume ds:nothing
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mov bp,[bp]
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retf 4
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PmIpx73Handler endp
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public PmIpxEntryPoint
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PmIpxEntryPoint proc
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push bp
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push ds
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push _DATA
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pop ds
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assume ds:_DATA
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mov bp,ax
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mov ax,VddHandle
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pop ds
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assume ds:nothing
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DispatchCall
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pop bp
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ret
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PmIpxEntryPoint endp
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_TEXT ends
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end
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