Sinclair ZX80

Developer: Science of Cambridge (renamed to Sinclair Computers Ltd in November 1979)
Type: Home Computer
Operating system: Sinclair BASIC
CPU: Z80 @ 3.25 MHz (most machines used the NEC μPD780C-1 equivalent)
Memory: 4K ROM, 1K RAM (externally expandable to 16K)
Display: 24 lines x 32 character text display Monochrome only
Sound: None, I/O Z80 bus, 250 baud cassette interface, RF television out
Storage: External cassette recorder
Successor: ZX81
Highlights:
Very slow program execution - no video chips, the CPU performs all of the computer functions
The keyboard is a membrane-type, a flat plastic surface which is difficult to use and wears-out rather quickly.
There was an upgrade kit to the ZX81 as can be seen in the last photo.

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Sinclair ZX80

Developer: Science of Cambridge (renamed to Sinclair Computers Ltd in November 1979)
Type: Home Computer
Operating system: Sinclair BASIC
CPU: Z80 @ 3.25 MHz (most machines used the NEC μPD780C-1 equivalent)
Memory: 4K ROM, 1K RAM (externally expandable to 16K)
Display: 24 lines x 32 character text display Monochrome only
Sound: None, I/O Z80 bus, 250 baud cassette interface, RF television out
Storage: External cassette recorder
Successor: ZX81
Highlights:
Very slow program execution - no video chips, the CPU performs all of the computer functions
The keyboard is a membrane-type, a flat plastic surface which is difficult to use and wears-out rather quickly.
There was an upgrade kit to the ZX81 as can be seen in the last photo.




 Gallery

 Comments (1)

Marc

Interesting that your upgrade membrane has the UK printing (Rubout, New Line) while my ZX80-USA has the US printing. Who would've thought they made two different membranes!

Reply

João Diogo Ramos

? they used a TS1000 membrane on your case, isn't it?