C64 ROM: Routine at FFA5

this routine reads a byte of data from the serial bus using full handshaking. the data is returned in the accumulator. before using this routine the TALK routine, FFB4, must have been called first to command the device on the serial bus to send data on the bus. if the input device needs a secondary command it must be sent by using the TKSA routine, FF96, before calling this routine.

errors are returned in the status word which can be read by calling the READST routine, FFB7.

this routine reads a byte of data from the serial bus using full handshaking. the data is returned in the accumulator. before using this routine the TALK routine, FFB4, must have been called first to command the device on the serial bus to send data on the bus. if the input device needs a secondary command it must be sent by using the TKSA routine, FF96, before calling this routine. errors are returned in the status word which can be read by calling the READST routine, FFB7.
FFA5	4C 13 EE	JMP $EE13	input byte from serial bus