|Richard Francis Altwasser|
|Education||Degree in Engineering (Trinity College, Cambridge)|
|Employer(s)||Sinclair Research (1980-1982)|
|Significant design||ZX Spectrum's graphics mode|
Altwasser graduated at Trinity College, Cambridge, with a degree in engineering in June 1978. He was hired by Sinclair Research in September 1980. His first assigned job was to write some programs to demonstrate the capabilities of the new 8 kB ROM and 16 kB RAM expansion for the ZX80. After that, he worked on the printed circuit board of the ZX81.
After the launch of the ZX81, Altwasser was promoted to the computers development team and worked on the development of the ZX Spectrum, from the early technical discussions at the end of July 1981. His main contribution was the design of the graphics mode using less than 7 kilobytes of memory. He also participated in the preliminary stages of the development of the ZX Microdrive.
Altwasser left Sinclair at the beginning of May 1982 to establish his own company, along with Steve Vickers, author of the Spectrum's ROM firmware and manual. Provisionally called Rainbow Computing Co., the company later became Jupiter Cantab Limited.
- Sinclair User, ed. (July 1982). "Secret plans laid by new company". Retrieved 2011-05-14.
- Your Computer, ed. (July 1982). "The Engineer Behind The Spectrum". Retrieved 2011-05-14.
- Popular Computing Weekly, ed. (August 1982). "Spectrum team deal their Ace". Retrieved 2011-05-14.
- Popular Computing Weekly, ed. (1983-11-03/09). "Jupiter hits the dust". Retrieved 2011-05-14.
- «Display for a computer» (Richard Altwasser's patent for the Spectrum's graphics mode)
- ZX Spectrum's chief designers reunited 30 years on
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