Sinclair ZX81

Description taken from the ´History of homecomputers´

Computer: Sinclair ZX81
Released in: march 1981
Sold about: over one million
CPU/Frequency: Z 80A/ca. 3,5 MHz
ROM: 8 KByte
RAM (extendable to) 1 (64) KByte
Screen: TV
Text display: 32*15
Graphics display: 64 *44
extendable to 256*192 with colours
Colours: s/w
extendable with colour HRGs
Sound: none (without soundbox)
There are soundboxes up to 3 channels mono
Operation system: own (nearly compatible with ZX80)
Size (in mm) 167*175*40
Weight: 350g

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