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Last modified 2021-01-04

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Cromemco Z-1

A picture of Cromemco Z-1


Type:8-bit hobbyist and development computer
CPU:Zilog Z80/4 @ 2 or 4 MHz
Operating system:Optional: CP/M, BASIC and more
Memory:ROM: 8 KB
RAM: 8 KB SRAM (Expandable to ? KB)
Graphics:LED indicators. Anything else is optional
Input:Binary switching
Optional keyboard
Power supply: Mains (Linear)
+8 VDC, 28 A
+16 VDC, 4.5 A
-16 VDC, 4.5 A
Current drain/power consumption:Depending on options
Dimensions (W*H*D):495*178*432 mm (19.5*7*17")
Weight:? Kg (? lb), without options
Manufactured:USA, 1976-1977 (Discontinued)
Other: 22*S-100 expansion slots.
Built-in 2708 PROM programmer for some versions.
The Z-1 was built into an IMSAI 8080 chassie
New price 1976 in the US: $2495 (Ready-built, basic system)
Unlike IMSAI 8080, the Z-1 was not available in kit form.
Related documents:
Notable "ham" software:
8K PROM card with programmer
4K SRAM card
16K DRAM card
Digital/analog I/O board
Digital interface card. 110-9600 baud.
Color graphics interface. Connects to TV