---
title: Cromemco Z-2
categories:
- Computers
types:
- Professional Computer
origins:
- U.S.A.
years:
- '1977'
cpus:
- Z80
params:
  name: Z-2
  image: /media/museum/photos/cromemco_z2_system_1.jpg
  company: /companies/cromemco
  company_name: Cromemco
  specs:
  - label: NAME
    value: Z-2
  - label: MANUFACTURER
    value: Cromemco
  - label: TYPE
    value: Professional Computer
  - label: ORIGIN
    value: U.S.A.
  - label: YEAR
    value: June 1977
  - label: CPU
    value: Z80
  - label: SPEED
    value: 4 Mhz.
  - label: RAM
    value: RAM and ROM sizes depended of the cards used
  - label: ROM
    value: 1 KB Monitor
  - label: TEXT MODES
    value: Depends on the video terminal used
  - label: I/O PORTS
    value: RS232C and Parallel interfaces
  - label: BUILT IN MEDIA
    value: Depends on the version
  - label: OS
    value: CP/M
  - label: POWER SUPPLY
    value: 8 V. and 18 V. integrated power supply
  - label: PERIPHERALS
    value: 21 x S-100 slots
  - label: PRICE
    value: 'Kit : $595 - Assembled : $995'
  tabs:
  - photos
  - adverts
  - hardware
  forum_thread: 551
  photos:
  - title: Z2D
    subtitle: ''
    text: |-
      The most popular Z2 version.\
      Expansion options include 512 KB 8" floppy drives, 11 or 22 MB hard disks ans high resolution graphics.
    image: /media/museum/photos/cromemco_z2d_system_1.jpg
  adverts:
  - title: Z-2 1977 ADVERT
    subtitle: ''
    text: 'Advert said: Cromemco microcomputers are the fastest and most powerful available. They use the Z80 microprocessor which is widely regarded as the standard of the future. So you''re in the technical fore with the Z-2'
    image: /media/museum/pubs/cromemco_z2_pub1.jpg
  - title: Z-2D ADVERT (1977)
    subtitle: ''
    text: |-
      Z-2D 1977 price list:

      \- Kit version with 1 F.D. drive: **$1495**\
      \- Assembled version: **$2095**\
      \- Additional F.D. drive: **$495**
    image: /media/museum/pubs/cromemco_z2d_pub_1.jpg
  - title: Z-2H 1980 ADVERT
    subtitle: ''
    text: ''
    image: /media/museum/pubs/cromemco_z2h_pub_1.jpg
  hardware:
  - title: SINGLE CARD COMPUTER
    subtitle: ''
    text: |-
      This all-in-one card offered:\
      \- a 4 Mhz. Z80 microprocessor\
      \- 8 Kb. ROM capacity (2716 PROM chips)\
      \- 1 Kb. on board static RAM\
      \- 76.800 bauds serial port\
      \- 24 bits bidirectional parallel I/O\
      \- 5 programmable timers

      1979 price: $450
    image: /media/museum/hardware/cromemco_singlecard_1.jpg
  oc_id: 559
  source:
    url: https://web.archive.org/web/20230528105430/http://www.old-computers.com/museum/computer.asp?c=559
    date: '2023-05-28'
---

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.