| # | Part Name | Description |
|---|
| 1 | Z8420AB1 | Z80 PIO parallel input/output controller, 4MHz |
| 2 | Z8420AC1 | Z80 PIO parallel input/output controller, 4MHz |
| 3 | Z8420AD1 | Z80 PIO parallel input/output controller, 4MHz |
| 4 | Z8420AD2 | Z80 PIO parallel input/output controller, 4MHz |
| 5 | Z8420AD6 | Z80 PIO parallel input/output controller, 4MHz |
| 6 | Z8420AF1 | Z80 PIO parallel input/output controller, 4MHz |
| 7 | Z8420B1 | Z80 PIO parallel input/output controller, 2.5MHz |
| 8 | Z8420BB1 | Z80 PIO parallel input/output controller, 6MHz |
| 9 | Z8420BC1 | Z80 PIO parallel input/output controller, 6MHz |
| 10 | Z8420BD1 | Z80 PIO parallel input/output controller, 6MHz |
| 11 | Z8420BD2 | Z80 PIO parallel input/output controller, 6MHz |
| 12 | Z8420BD6 | Z80 PIO parallel input/output controller, 6MHz |
| 13 | Z8420BF1 | Z80 PIO parallel input/output controller, 6MHz |
| 14 | Z8420C1 | Z80 PIO parallel input/output controller, 2.5MHz |
| 15 | Z8420D1 | Z80 PIO parallel input/output controller, 2.5MHz |
| 16 | Z8420D2 | Z80 PIO parallel input/output controller, 2.5MHz |
| 17 | Z8420D6 | Z80 PIO parallel input/output controller, 2.5MHz |
| 18 | Z8420F1 | Z80 PIO parallel input/output controller, 2.5MHz |
