|  24 pin DZM 12 DREH connector  to the C64 UserPort | |  | C64 | Printer |  | 
|---|
 | Ground | A | 33 | Ground |  | Flag 2 | B | 11 | Busy |  | PB0 | C | 2 | Data 1 |  | PB1 | D | 3 | Data 2 |  | PB2 | E | 4 | Data 3 |  | PB3 | F | 5 | Data 4 |  | PB4 | H | 6 | Data 5 |  | PB5 | J | 7 | Data 6 |  | PB6 | K | 8 | Data 7 |  | PB7 | L | 9 | Data 8 |  | PA2 | M | 1 | Strobe |  | Ground | N | 16 | Ground | 
 |  36 pin CENTRONICS male connector  to the printer |