C64 ROM: Routine at FFB1

this routine will command a device on the serial bus to receive data. The accumulator must be loaded with a device number between 4 and 31 before calling this routine. LISTEN convert this to a listen address then transmit this data as a command on the serial bus. The specified device will then go into listen mode and be ready to accept information.

this routine will command a device on the serial bus to receive data. The accumulator must be loaded with a device number between 4 and 31 before calling this routine. LISTEN convert this to a listen address then transmit this data as a command on the serial bus. The specified device will then go into listen mode and be ready to accept information.
FFB1	4C 0C ED	JMP $ED0C	command devices on the serial bus to LISTEN