Z88 Developers' Notes | ||
---|---|---|
Contents | Contents of System Calls |
OS_Gbt, get byte from file (or device) with timeout
RST 20H, DEFB $3F
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 secondsOUT, 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.0Registers changed after return:
....DEHL/IXIY same AFBC..../.... differentNotes:
Bugs:
Related calls:
GN_Cl, close file
GN_Del, delete a file from memory
GN_Opf, open file/resource (wildcard search)
GN_Ren, rename file
OS_Cl, internal close (OZ usage)
OS_Del, file delete (internal OZ usage)
OS_Frm, file read miscellaneous
OS_Fwm, file write miscellaneous
OS_Gb, get byte from file (or device)
OS_Mv, move bytes between stream and memory
OS_Op, internal open (OZ usage)
OS_Pb, write byte to file, device
OS_Pbt, write byte to file, device with timeout
OS_Ren, file rename (internal OZ usage)