Commodore card edges Commodore 26-Contact (13 top + 13 bottom) Parallel Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Numbering alternates between top and bottom, with contact 1 at bottom. Contacts 1 and 2 are on same end of card-edge. There is a 0.05" gap between contacts 21/22 and 23/24. Card edge protrudes 0.55" from main circuit board. Parallel Printer Port 2 26 Parallel Printer Port 1 25 Commodore 24-Contact (12 top + 12 bottom) IEEE-488 Port Card-Edge. Contacts are 0.09" x 0.35" on a 0.156" pitch. Contacts are numbered 1 to 12 on top and A to N on bottom (excludes G and I). Contacts 1 and A are on same end of card-edge. There is a 0.066" gap between contacts 2/B and 3/C and 9/K and10/L. Card edge protrudes 0.55" from main circuit board. Commodore IEEE-488 Commodore IEEE-488 1 12 A N Commodore 64 44-Contact (22 top + 22 bottom) Expansion Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Contacts are numbered 1 to 22 on top and A to Z on bottom (excludes G, I, O, and Q). Contacts 1 and A are on same end of card-edge. Card edge protrudes 0.55" from main circuit board. 1 22 Commodore 64 Expansion Port Commodore 64 Expansion Port A Z Commodore 26-Contact (13 top + 13 bottom) Parallel Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Numbering alternates between top and bottom, with contact 1 at bottom. Contacts 1 and 2 are on same end of card-edge. There is a 0.05" gap between contacts 21/22 and 23/24. Card edge protrudes 0.55" from main circuit board. >Name GND GND GND GND GND GND GND GND GND Commodore Parallel Printer Port GND GND GND GND Strobe PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 Busy N/C N/C N/C Commodore 24-Contact (12 top + 12 bottom) IEEE-488 Port Card-Edge. Contacts are 0.09" x 0.35" on a 0.156" pitch. Contacts are numbered 1 to 12 on top and A to N on bottom (excludes G and I). Contacts 1 and A are on same end of card-edge. There is a 0.066" gap between contacts 2/B and 3/C and 9/K and10/L. Card edge protrudes 0.55" from main circuit board. Commodore IEEE-488 Port >Name DIO1 DIO2 DIO3 DIO4 EOI DAV NRFD NDAC IFC SRQ ATN SHIELD DIO5 DIO6 DIO7 DIO8 REN GND GND GND GND GND GND GND Commodore 64 44-Contact (22 top + 22 bottom) Expansion Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Contacts are numbered 1 to 22 on top and A to Z on bottom (excludes G, I, O, and Q). Contacts 1 and A are on same end of card-edge. Card edge protrudes 0.55" from main circuit board. GND VCC VCC !IRQ R/!W Dot Clock I/O1 !Game I/O2 !EXROM !ROML BA !DMA D7 D6 D5 D4 D3 D2 D1 D0 GND GND !ROMH !RESET !NMI Phase2 A15 A14 A13 A12 A11 A10 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 GND Commodore 64 Expansion Port >Name Commodore 26-Contact (13 top + 13 bottom) Parallel Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Numbering alternates between top and bottom, with contact 1 at bottom. Contacts 1 and 2 are on same end of card-edge. There is a 0.05" gap between contacts 21/22 and 23/24. Card edge protrudes 0.55" from main circuit board. Commodore 24-Contact (12 top + 12 bottom) IEEE-488 Port Card-Edge. Contacts are 0.09" x 0.35" on a 0.156" pitch. Contacts are numbered 1 to 12 on top and A to N on bottom (excludes G and I). Contacts 1 and A are on same end of card-edge. There is a 0.066" gap between contacts 2/B and 3/C and 9/K and10/L. Card edge protrudes 0.55" from main circuit board. Commodore 64 44-Contact (22 top + 22 bottom) Expansion Port Card-Edge. Contacts are 0.05" x 0.35" on a 0.1" pitch. Contacts are numbered 1 to 22 on top and A to Z on bottom (excludes G, I, O, and Q). Contacts 1 and A are on same end of card-edge. Card edge protrudes 0.55" from main circuit board.