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(this version incorporates my latest fix to ensure reliable 3.5" drive opertion)
Low nibble IC6 Yellow dot
High nibble IC5 Blue dot
Low nibble IC2 White dot
Low nibble IC2 Green dot
High nibble IC3 Blue dot
IC9 Purple dot
IC9 Purple dot
I have a number of spare PCB's left over from my replica builds which I offer here together with a few other difficult to find parts:
| Item | Picture | Available | Price |
| Keyboards | |||
| Replica ASCII Keyboard PCB (Atom version) |
|
0 | £25 |
| ASCII Keyboard PCB (Electron version) |
|
1 | £25 |
| Backplanes | |||
| Backplane 8-Slot Buffered PCB (with B-side tracked) |
|
5 | £12 |
| Backplane 10-Slot Unbuffered PCB (with B-side tracked) |
|
1 | £12 |
| Backplane 12-Slot Buffered PCB (with B-side tracked) |
|
2 | £20 |
| Backplane Extender Board PCB |
|
0 | £15 |
| Backplane Extender Board - Kit including the five 64-way connectors required some of which are hard to find, you just need to add a length of 64-way ribbon cable |
|
1 | £40 |
| Memory Boards | |||
| Replica 8K RAM + 8K ROM Board PCB |
|
5 | £10 |
| Replica 32K Dynamic RAM Board PCB |
|
2 | £10 |
| Replica CUMEM Universal Memory Carrier Board PCB |
|
5 | £10 |
| Dual Port RAM Board PCB |
|
3 | £5 |
| 2732-2532 EPROM Adapter PCB |
|
5 | £2 |
| Video Boards | |||
| Replica 40x25 VDU (Teletext) Interface Board PCB |
|
1 | £10 |
| Replica 80x25 VDU Interface Board PCB |
|
5 | £10 |
| 80x25 VDU Interface (Enhanced) Board PCB |
|
5 | £10 |
| Processor & Interface Boards | |||
| Replica 6502A CPU Board PCB |
|
0 | £10 |
| Replica Versatile Interface Board (VIB) PCB |
|
5 | £12 |
| Replica Econet Node Board PCB |
|
3 | £10 |
|
Replica Floppy Disk Controller
Board PCB (this version incorporates my latest fix to ensure reliable 3.5" drive opertion) |
|
4 | £10 |
| Programmers | |||
| Replica PROM Programmer Board PCB |
|
1 | £12 |
| PROM Programmer Power Supply PCB |
|
1 | £4 |
| PROM Programmer Front Panel PCB |
|
3 | £3 |
| TESLA PROM Programmer PCB | photo to follow | not yet available | |
| Acorn System 1 | |||
| Pair of National
Semiconductor DM74S571J PROMs
programmed with
Acorn System 1 Monitor. Low nibble IC6 Yellow dot High nibble IC5 Blue dot |
|
2 | £30 |
| Atom | |||
| Atom Riser Card PCB |
|
4 | £2 |
| Replica Atom Econet Node PCB | photo to follow | not yet available | |
| Replica Floppy Disk Controller PCB | photo to follow | not yet available | |
| MK14 | |||
| Replica MK14 PCB, black solder resist with gold flash |
|
4 | £25 |
| Pair of National
Semiconductor DM74S571J PROMs
programmed with
SCIOS Version 1
(with 9th digit modification). Low nibble IC2 White dot |
|
1 | £30 |
| Pair of National
Semiconductor DM74S571J PROMs
programmed with
SCIOS Version 2 (i.e. with cassette routines). Low nibble IC2 Green dot High nibble IC3 Blue dot |
|
2 | £30 |
| SOFTY 1 | |||
| Replica SOFTY 1 Programmer PCB, black solder resist with gold flash |
|
4 | £25 |
| 2716 Adapter |
|
3 | £2 |
| SOFTY 1 Power Supply PCB |
|
2 | £4 |
| National
Semiconductor DM74S287 PROM
programmed with SOFTY 1 Character Font IC9 Purple dot |
|
0 | £20 |
| National
Semiconductor DM74S571 PROM
programmed with SOFTY 1 Character Font IC9 Purple dot |
|
1 | £15 |
| New Intel 2708 EPROM
programmed with SOFTY 1 Firmware (IC17) |
|
1 | £20 |
| New MM2102 Static RAM (IC4) |
|
2 | £5 |
| Miscellaneous | |||
| New INS8154D National Semiconductor part in gold capped ceramic package |
|
0 | £15 |
| MC6845P Motorola part in plastic package |
|
1 | £5 |
| HD46505SP-2 Hitachi part, these were bought from China and are not HD46505SP-2 because some of the registers are missing !, they behave as a basic MC6845 |
|
5 | £1 |
| Used and programmed 74S287 PROM, still useful for testing programmers | 10 | £1 | |
| Used and programmed 74S571 PROM, still useful for testing programmers | 3 | £1 | |
All PCBs are blank/unloaded boards unless otherwise stated !
UK postage is £3.20 on any size order, please email for overseas postage.
I can order more boards if there is demand, drop me an email.
Please email me at acorn@oddys.plus.com) to confirm availability (as I also sell on eBay, where stock levels are more accurate) and I will send a PayPal invoice for payment.