General Category > Amstrad CPC hardware

CPC Mainboard Versions

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nocash:
Hi, I've tried to compile a list of all CPC mainboards here, http://cpcwiki.eu/index.php/Mainboard_Versions. There seem to be many-many of versions & sub-versions.

Some pictures are still missing (marked by the red circle with invisible white question mark), and probably further boards exists, which aren't listed at all. I hope some people will add more board numbers & photos!

Oh, and maybe one or two listed versions didn't exist at all (for example, the "CPC6128 version 1.5", does that exist?) (and maybe the drawings in the service manuals were unreleased prototypes?).

robcfg:
I've been trying to spot differences between the picture of my 664 board and the one in amstrad.cpc.free.fr and they're almost identical but for a couple of details.


As you say it reads MC0005B instead of MC0005A and you can find a resistor attached a bit up from a small IC near the A of Amstrad.

nocash:
Found another pic of the MC0005B while moving pics from the cpcwiki coppermine gallery. It's better resolution than the free.fr one, and has the extra resistor, too. Btw. good finding! I didn't notice that there was an extra resistor.

Hmmmm, only two 664 boards... is that all? Was the 664 discontinued when the 6128 came out? Or should there be also newer 664 boards existing?

Or, possibly 664s with newer 6128 boards inside (without PAL and with only 64K RAM installed), the 6128 board does have that option, but no idea if it that variant was ever produced?

nocash:
Does somebody know why there were GX4000 boards without TV modulator?
Maybe Amstrad supported only PAL modulators, but no SECAM ones... so french versions never included modulators?
Or were there special super GX4000 versions with monitor instead modulator?

arnoldemu:

--- Quote from: nocash on 03:36, 10 April 10 ---Does somebody know why there were GX4000 boards without TV modulator?
Maybe Amstrad supported only PAL modulators, but no SECAM ones... so french versions never included modulators?
Or were there special super GX4000 versions with monitor instead modulator?

--- End quote ---
I am sure this is documented? Maybe it's in the GX4000 user manual? The French version doesn't have modulator. The English version has modulator.

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