C64 ROM: Routine at FFB7

Used by the routines at ABBF, AF28, E168 and E195.

this routine returns the current status of the I/O device in the accumulator. The routine is usually called after new communication to an I/O device. The routine will give information about device status, or errors that have occurred during the I/O operation.

Used by the routines at ABBF, AF28, E168 and E195. this routine returns the current status of the I/O device in the accumulator. The routine is usually called after new communication to an I/O device. The routine will give information about device status, or errors that have occurred during the I/O operation.
FFB7	4C 07 FE	JMP $FE07	read I/O status word