The Jupiter ACE was a British home computer of the 1980s, marketed by a company named Jupiter Cantab and named after the early British computer, the ACE. The company was formed by Richard Altwasser and Steven Vickers, who had been on the design team for the Sinclair ZX Spectrum. The Jupiter ACE somewhat resembled a ZX81 in a white case, with black rubber keys like the Spectrum. It displayed output on a television, and programs could be saved and loaded on cassette tape, as was standard at that time. The machine was based on a Zilog Z80 processor clocked at 3.25 MHz, and came with 3 KB RAM, expandable to [LINK: http://www.jupiter-ace.co.uk/doc_memorymap.html] 51 KB. While it had only one video mode, text only, which displayed 24 rows of 32 columns of characters in black and white, it was possible to display graphics, by redefining the 8×8 pixel bitmap of any of the 128 characters. Like the ZX

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