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C > CROMEMCO  > Z-2     


The Z2 system was an evolution of the Z1 model. Major change was a new CPU board using a 4 Mhz. Z80 microprocessor. The system, always based on the S-100 bus, proposed 21 connectors for S-100 cards and a stronger power supply able to supply additional peripherals. The front panel didn't offer any switches or control leds. 8080 based software made with the Z-1 model could run on the Z-2 system

The Z2-D (September 1977) version included 64 KB of RAM, one or two 92 KB (then 184 KB) formatted floppy drives and controller card.
The Z2-H system appeared in July, 1980. Using the Z-2 basis but including a 11 MB hard disk, two dual sided floppy disc drives and 64 KB of RAM memory.



I was part of a team that installed about six of these computers for use in the Health Service for word processing (Wordstar) and data capture. We wrote software to capture data about children''s vaccinations which could
then be sent via an accoustic modem to a mainframe system. The basic hardware was very reliable, but let down by unreliable external eight inch disk
floppy disk drives and poor quality modem links. The ''customers''
hated the data transmission but were happy to replace typewriters with Wordstar. A few lucky ones even got a daisywheel printer!

Friday 25th February 2011
Peter Fisk (Essex, England)

I remember my excitement when we received our Z-2 during my senior year at El Capitan HS. We finally had an alternative to the school district''s HP2000F Time-Share system. My first project was to hack-together a Z80 version of Pong that I never got to work right. I was heart-broken when I heard it was stolen while I was away to Basic Training in 1979.

Tuesday 27th April 2010
GCG$3 (Bob) (Yorktown, VA)

In 1976 i was on the degsine team for this Cromemco Z2 system i had worked day and night i went without sleep for 15 days it was very very hard i had completed Cromemco Z2 system prototype but at a high price when we fired it up it blew up into a fire that destroyed my

Friday 18th February 2005
david wright (louisville, kentucky)


TYPE  Professional Computer
YEAR  June 1977
CPU  Z80
SPEED  4 Mhz.
RAM  RAM and ROM sizes depended of the cards used
ROM  1 KB Monitor
TEXT MODES  Depends on the video terminal used
I/O PORTS  RS232C and Parallel interfaces
BUILT IN MEDIA  Depends on the version
POWER SUPPLY  8 V. and 18 V. integrated power supply
PERIPHERALS  21 x S-100 slots
PRICE  Kit : $595 - Assembled : $995



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