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Sinclair ZX81
Pictures | Tech Specs

The ZX81, could be bought as a build-yourself kit for £49.95, or for £69.95 assembled, and proved very popular, with Sinclair producing up to 40,000 a month.
With only 1K of RAM, a very low resolution black & white display and no sound, it is far removed from computers of today.


Pictures
The ZX81 itself, and in kit form


A few example screen shots, unfortunately taken with an emulator as I don't have a power supply or any software for it yet...


Tech specs
Processor: 3.25MHz Zilog Z80A
Memory: 1K RAM with 901 bytes available (upgradable to 64K)
Video: 32 columns by 24 rows of text, 64 x 44 in graphics mode (various hi-res graphics ad-ons were available)
Colours: Monochrome
Sound: None
Storage: External cassette recorder



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