There are series of cables that connect PC or Amiga to Commodore 64 as IEC simulation.
XA1541 - 4 transistors
XA1541 on BS170 works without resistors. (However, not wilh all computers - some new ones make problems.)
Links to other pages
- Description how to build XA1541 cable.
- IECATA : IDE/CF as Commodore IEC
- IDE harddisk or CompactFlash can be used as a Commodore IEC device.