Sinclair ZX81

Manufacturer: Sinclair
Model: ZX80
Released: 1981
Processor Z80A, 8 Bit
Mhz: 3,25
RAM: 1 KB (expandable to 16 KB, from third-party up to 64 KB)
Operating Systems: Basic (in ROM), Maschincodes
Graphic, Resolution: Text: 32x24(22 usable), Graphic: 64x44 (quater Characters)
Colors: monocrome
Sound: -
Ports: 1 HF (TV), 1 I/O Tapedrive, 1 Expansionsport
Keyboard: 40 Keys, QWERTY
Internal Drives: -
Specials: was also avaiable as selfbuild-kit
Accessories: 16K-RAM Cartridge
Launch price: Complete: 499,- DEM; selfbuild-kit: 399,- DEM
Sold Pieces: 2 Mio.
Got own one from: Market

The ZX81 follows the ZX80