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include vmm.inc VMMcall Is_Debug_Chr jz no_character ; zero flag set if no character available mov byte ptr [Char], al ; character from debugging device |
The Is_Debug_Chr service checks for a character from the debugging device.
This service has no parameters.
If the zero flag is clear, the AL register contains the character from the debugging device. The zero flag is set if no character is available.
This service has no effect in the retail version of Windows. It is intended to be used with the debugging version.
EAX, Flags