Compatibility: DPMI 0.9+
Expects: AX    0b01H
BX    watchpoint handle (as obtained via INT 31H 0b00H)
                                                                  
Returns: CF    NC (clear) if successful; else AX = DPMI Error Code
                                                                  
Info: Clears a debug watchpoint previously specified via INT 31H 0b00H
and releases the watchpoint handle.

You may use INT 31H 0b03H to clear the watchpoint without
releasing the handle.

See Also: DPMI API
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INT 31H 0b01H: Clear Debug Watchpoint