The start and after a good cleaning:
Boards fitted from left to right:
| Cassette Interface | hand wired as original Acorn design | |
| 6502 CPU Board | original Acorn board | |
| 40x25 VDU (Teletext) Interface Board | original Acorn board | |
| UHF Modulator | hand wired | |
| 8K RAM + 8K ROM Board | original Acorn board | |
| 12K ROM board | hand wired, my design for 6 x 2716 EPROMs | |
| I/O Card | hand wired, my design - 8255 | |
| PIA Board | hand wired, my design - 2 x 6821 | |
| PROM Programmer | similar to the Acorn PROM Programmer Board | |
| Serial Interface | hand wired, my design using 2 x 6850 | |
| Extension Board | Veroboard | |
| Dual 10-bit ADC | hand wired, my design using 2 x AD570 | |
| Quad 10-bit DAC | hand wired, my design using 4 x AD561 | |
| PROM Programmer | hand wired, my design | |
| CU INDIO | Control Universal 6522 card |
and in front:
| 8K RAM + 8K ROM Board | original Acorn board | |
| Keyboard, Display & Cassette Interface Board | original Acorn board | |
| 32K Dynamic RAM Board | original Acorn board |
The 6502 Microcomputer Board was a 2nd board bought around 1980 (from Watford Electronics for a fiver, wish I'd bought more !), unfortunately I've misplaced the original 6502 CPU Board that was part of my System 1, I'm hoping it turns up sometime.
All fitted in an original Acorn System 2 Vero Card Frame with 14-slot Backplane
The keyboard was built from an ex-data entry keyboard, it uses an AY-5-2376 rather than the AY-3-4592 used in the Acorn ASCII Keyboard, perhaps I couldn't get hold of a 4592 at the time ? The trouble with the 2376 is that it needs -12V. I plan to build a new keyboard using the 'proper' 4592 and a spare BBC keyboard.
