Is_Debug_Chr

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
 

Checks for a character from the debugging device. Uses EAX, Flags.

• Returns with the zero flag clear if a character is available, set otherwise. If a character is available, it is returned in the AL register.

This service has no effect in the retail version of Windows. It is intended to be used with the debugging version.

See Also

In_Debug_Chr