Well that didn't run as long as I thought, you are correct it is a zx81 with a Croma81 and ZXpand+

March 13, 2026 - 10:54 UTC

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Wow that’s quite an upgrade for a ZX81 (To be fair many 8bits). That’s not the tower of power but an extraordinary expansion explosion💥.
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Is that the Filesixty keyboard? I had one on mine.
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Mine is for the Camputers Lynx. Do you have the source code for the zx81 one? Could be useful!
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No but I guess you could load it into an emulator like 81 and get it that way
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It was just a feeling. It was either that or some obscure Japanese 8bit that had invader character graphics in its character set.
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I got the Croma81 for Christmas and set it up last Sunday and I am amazed by it
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Amazing. Are these available to buy still? And is that an improved keyboard?
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And I'd love for some of the cleverer people to colourise a few more games 😁
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@annierat1.bsky.social got my one before Christmas, Annette said to email him because we're not sure if the website is updated, and the keyboard is an old stick on overlay

www.fruitcake.plus.com/Sinclair/ZX81/Chroma/ChromaInterface_Availability.htm
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