Int 14/AH=12h

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Digiboard DigiCHANNEL PC/X* - GET TRANSMIT BUFFER FREE SPACE

AH = 12h
DX = port number (00h-03h) (04h-43h for XAPCM232.SYS)

Return:
AX = number of bytes free

See Also: AH=0Ah"Digiboard" - AH=14h"Digiboard"

Category: Serial I/O - Int 14h - D

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