IN:
BC = timeout in 1/100 second ticks
IX = handle of file (or device)
OUT, if call successful:
Fc = 0, if byte read OK
A = byte read
BC = remaining time in 1/100 seconds
OUT, if call failed:
Fc = 1
A = error code:
RC_EOF ($09), end of file reached
RC_HAND ($08), bad handle supplied in IX
RC_RP ($13), device is read-protected
RC_TIME ($02), if timeout.
RC_ESC ($01), escape, if device :COM.0, :PRT.0, or :INP.0
RC_SUSP ($69), if device is :COM.0, :PRT.0 or :INP.0
RC_DRAW ($66), if device is :INP.0
RC_QUIT ($67), if device is :INP.0
Registers changed after return:
....DEHL/IXIY same
AFBC..../.... different |