There are a total of 7 cards in one machine. The Video Deflection card was missing from the second unit.
| Resto Unit | Spares Unit | Description | |
| Power Supply | Early Variant | Late Variant | Provides 5, 12, -12, -5, +26V. Note that the 5V regulator is mounted offboard on a heatsink at the bottom of the unit. |
| Video & Deflection | Missing | This provides all the analogue stuff for the video display. It’s quite unique. It’s also very rough with a lot of mods. | |
| Microcomputer | Z80 processor, 8051 UART, 2716 ROMs and 16k RAM that can be switched in place of the ROM. The monitor will come up with just this card and the two video cards. | ||
| RAM | 80k DRAM. | ||
| Video Control II | All the digital stuff to produce the video signals. No memory – it DMAs from main RAM. | ||
| Input/Output | Missing Z80APIO | Has Z80APIO | Provides parallel and serial ports. The parallel port chip is missing from one card. |
| Floppy Disk Controller | Bespoke floppy disk controller card. Writes a unique format. |
Microcomputer
RAM
Floppy Disk Controller
Input/Output
Video Control II
Video & Deflection
Power Supply
