| PCB | Printed Circuit Card | 200,003 issue 2 of later |
| IC3-10 | 2114 RAM | and 18 pin socket |
| IC1, 2, 11-16 | 18 pin sockets supplied for extension RAM | |
| IC17 | BASIC ROM and 24 pin socket | |
| IC18 | 24 pin socket supplied for extension ROM | |
| IC19 | 74LS42 and 16 pin socket | |
| IC20 | 74LS00 and 14 pin socket | |
| IC21 | 81LS95 or 97 and 20 pin socket | |
| IC22 | INS8208 and 20 pin socket | |
| IC23 | 81LS95 or 97 and 20 pin socket | |
| IC24 | 74L42 and 16 pin socket | |
| IC25 | 74LS00 and 14 pin socket | |
| R1 | 1K resistor | |
| C1-7 | 7 off 47 or 100 nF capacitors | |
| C8 | 15uF electrolytic capacitor |
NB IC24 is a 74L42 from National Semiconductor only