The Commodore cross cable


You need the following parts to build this cable:

  • Two solderable user port plugs
  • A shielded 10-wire or unshielded 11-wire cable of, preferably at most, 2 meters

Solder both ends of the cable onto the user port plugs. You should have the following connections:

User port plug User port plug
 C, PB0  C, PB0
 D, PB1  D, PB1
 E, PB2  E, PB2
 F, PB3  F, PB3
 H, PB4  H, PB4
 J, PB5  J, PB5
 K, PB6  K, PB6
 L, PB7  L, PB7
 8, PC2  B, FLAG2
 B, FLAG2  8, PC2

Note that pins 8 (PC2) and B (FLAG2) are swapped at either end.

Circuit diagram:

[Commodore cross cable]

You can find the description of all parts used on the diagrams at the legend page.

Source: The Joe Forster-STA homepage