I have a lot of components left over from my various projects which I offer here:
| Item | Picture | Available | Price |
| Programmed PROMs and EPROMs | |||
| Pair of Tesla MH74S571 PROMs
programmed with
Acorn System 1 Monitor Low nibble IC6 Yellow dot High nibble IC5 Blue dot |
 |
1 | £15.00 |
|
System 1 Trainer EPROM New Mitsubishi M5L2732K programmed with the System 1 Monitor and Applications |
 |
1 | £10.00 |
| Pair of Tesla MH74S571 PROMs
programmed with
SCIOS Version 1
(with 9th digit modification) Low nibble IC2 White dot |
 |
1 | £15.00 |
| Pair of Tesla MH74S571 PROMs
programmed with
SCIOS Version 2
(i.e. with cassette routines) Low nibble IC2 Green dot High nibble IC3 Blue dot |
 |
1 | £15.00 |
| Pair of Tesla MH74S571 PROMs
programmed with
SCIOS Version 3 (This
is a new version with the 'Fast Loader' as described in a thread on
vintage-radio.net ). Low nibble IC2 Orange dot High nibble IC3 Purple dot |
 |
1 | £15.00 |
| Tesla MH74S571 PROM
programmed with Softy 1/2 Character Font IC9 Purple dot |
 |
1 | £10.00 |
| New Intel 2708 EPROM
programmed with Softy 1 Firmware (IC17) |
 |
1 | £15.00 |
| Used and programmed National Semiconductor 74S287 PROM, still useful for testing programmers | 5 | £1.00 | |
| Used and programmed National Semiconductor 74S571 PROM, still useful for testing programmers | 5 | £1.00 | |
| Interface | |||
| New INS8154D National Semiconductor part in gold capped ceramic package |
 |
0 | £40.00 |
| (Probably) Used INS8154N National Semiconductor part in plastic package |
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0 | £25.00 |
| TMS2793 Floppy Disk Controller, suitable for the FileStore project |
 |
1 | £12.00 |
| AY-3-4592 Keyboard
Controller used on the Acorn System Keyboards Only avaliable to those purchasing a System Keyboard PCB. |
 |
Last 2 ever ? | £25 |
| Miscellanous | |||
| 1.008 MHz Crystal in the larger HC33u can (the smaller HC49u crystals don't work in a System 1) - 1MHz crystals in the HC33u can are almost impossible to find but I have managed to source these that are close enough in frequency ! |
 |
4 | £4.00 |