Compatibility: DPMI 0.9+
Expects: AX    0b00H
BX:CX linear address of watchpoint
DL    size of watchpoint (1, 2, or 4 bytes)
DH    type of watchpoint: 00H = execute
01H = write
02H = read/write
Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
Info: Sets a debug watchpoint at the specified linear address.  When
the specified action occurs, an INT 03H is invoked.

See Also: DPMI API
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INT 31H 0b00H: Set Debug Watchpoint