The software support for the PC-Link is implemented in the ROM of the IDE64 controller.
While upgrading IDE64 firmware you have to select IDE64 firmware with Serial PC-Link or Parallel PC-Link.
Serial PC-Link
Parallel PC-Link
DUART_PORT-C64 COM_PORT-PC -------------- ----------- Pin (9 Pin) (25 Pin) [2 RxD] --- [3 2 TxD] [3 TxD] --- [2 3 RxD] [7 RTS] --- [8 5 CTS] [8 CTS] --- [7 4 RTS] [5 GND] --- [5 7 GND]
This is a description of the serial C64/PC cable
To use serial RS-232 link you need DUART serial card and serial (null modem with handshaking) cable and execute small server program on the PC.
USER_PORT-C64 LPT_PORT-PC ------------- ----------- Pin Pin A,1 --- 18..25 GND C --- 15 ERROR D --- 13 SELECT E --- 12 PAPER F --- 10 ACK IN H --- 2 D0 J --- 3 D1 K --- 4 D2 L --- 5 D3 M --- 11 BUSY N,12 --- 18..25 GND
This is a description of the parallel C64/PC cable
You only need to solder this cable and execute small
server program on the PC.
Warning: Incorrectly created cable can damage your PC and/or C64 computer. Never plug the cable while the computers are turned on. Use at your own risk.