45 lines
1.3 KiB
C
45 lines
1.3 KiB
C
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extern ULONG DevHlp;
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/*
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* Look at \WATCOM\H\OS2\DEVHLP.INC for the list of
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* definitions for device driver helper functions
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*/
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USHORT DevSetTimer // Register a timer handler
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(
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NPVOID Handler // Handler function entry-point
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); // Returns: 0 = success, other = error code
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#pragma aux DevSetTimer = \
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"mov dl,1Dh" \
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"call dword ptr DevHlp" \
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"setc dl" \
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"xor dh,dh" \
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"neg dx" \
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"and ax,dx" \
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modify [dx] \
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parm [ax] \
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value [ax];
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USHORT DevPhysToVirt // Convert a physical address to a 16:16 address
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(
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ULONG PhysAddr, // Physical address to convert
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USHORT Length, // Length of virtual segment
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PVOID VirtAddr // Storage for virtual address
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); // Returns: 0 = success, other = error code
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#pragma aux DevPhysToVirt = \
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"xchg ax,bx" \
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"mov dx,0115h" \
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"call dword ptr DevHlp" \
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"setc dl" \
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"xor dh,dh" \
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"neg dx" \
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"mov fs:[si][0],di" \
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"mov fs:[si][2],es" \
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"and ax,dx" \
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modify [dx es di] \
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parm [bx ax] [cx] [fs si] \
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value [ax];
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