RAM for RiscPC and A7000 systems

Suitable for fitting in almost all RiscPC and A7000 (and derivative) machines.

Although Fast Page (FP) was originally specified for early models most machines will work perfectly with EDO. In fact, experience shows that the modern EDO SIMMs are actually more reliable than FP. You should always fit EDO to A7000FE machines like the A7000+, RiscStation and Mico.

If you have a RiscPC 600 then see the notes RiscPC 600 RAM below

There is always the potential for timing problems with RiscPCs, especially those fitted with a Strong ARM processor. It is never possible to guarantee that RAM will work in any particular machine, in particular when fitted with a 586 PC card. We therefore offer a refund (less carriage) if RAM is not satisfactory.

Items marked '++' may not fit in the socket of most Series 1 RPC 600 machines. They will fit in all series 2 or 3 motherboards and the A7000+.*
Some RiscPC 600s have sockets which will accept these but there is no way to tell by serial numbers etc.
* A small number of A7000+ machines seem to have a slightly higer socket which requires some trimming with a Stanley knife to get the low clearance SIMM to fit.
All prices include UK carriage. Please add £1.50 outside UK

Purchase 64 MB EDO SIMM for Series 2 or 3 RiscPC or A7000+.
Note these are NOT high clearance.
Price £16 including UK carriage, plus £1.50 carriage outside UK.

Purchase 64 MB EDO SIMM for any RiscPC.
Note these are high clearance.
Price £20 including UK carriage, plus £1.50 carriage outside UK.

Purchase 128 MB EDO SIMM for any RiscPC or A7000+.
Price £41 including UK carriage, plus £1.50 carriage outside UK.

Purchase two 64 MB EDO SIMMs for Series 2 or 3 RiscPC or A7000+, total 128MB. Note that the A7000+ can only accept one SIMM.
This is usually a better more compatible (and cheaper) option than a single 128MB.
Note these are NOT high clearance.
Price £30 including UK carriage, please add £2 carriage outside UK.

Purchase two 64 MB EDO SIMMs for any RiscPC. Total 128MB.
This is usually a better more compatible (and cheaper) option than a single 128MB.
Note these are High Clearance
Price £39 including UK carriage, please add £2 carriage outside UK.

RiscPC VRAM

• 1 Mb VRAM £22
• 2 Mb VRAM £49
• 1 to 2 Mb exchange £36

Prices include UK carriage. Please add £1.50 outside UK.

Purchase 1 MB VRAM for RiscPC.
Price £22 including UK carriage, plus £1.50 carriage outside UK.

Purchase 2 MB VRAM for RiscPC..
Price £49 including UK carriage, plus £1.50 carriage outside UK.

All VRAM is suitable for fitting to any RiscPC. Note that some early Acorn VRAM, especially 1Mb units, is not suitable for use in Strong ARM machines.

Risc PC 600 RAM

The early RiscPC 600 machines were fitted with SIMM sockets which were higher than on more recent machines so many modern double sided SIMMs won't fit. In particular this applies to 32 Mb FP and you will need to fit High Clearance (HC). If in doubt check the model number in the centre rear of the motherboard. If this is 0197.000 you need HC, if it's 0197.100 or 1208.000 you don't.

All RiscPC 600 motherboards with an 0197 number were fitted with capacitor C32. This was intended to improve stability with large amounts of RAM, but when larger SIMMs appeared (they didn't exists when the RiscPC was launched) it was found to have exactly the opposite effect. If you intend to fit 64 Mb SIMMs you should therefore remove this capacitor. It's a small surface mount device, and is located as shown below.

It's easily removed using a normal soldering iron but if you have any doubts about your ability to do this then don't touch it. If you mess it up you could damage the motherboard. If you don't have a friend you can trust then most TV repair shops would do it for a few pounds

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