Zenith Z-89

Zenith Z-89
	Zenith Z-89 in Paris 2008
Also known as	Heathkit H89
Manufacturer	Zenith Data Systems (ZDS)
Type	Personal computer
Release date	1979
Introductory price	Kit version with 1 floppy drive: US$1800 in 1979 (circa equivalent to $7,600 in 2023)
Discontinued	1985
Operating system	ROM monitor, HDOS, CP/M, UCSD Pascal (P-System Pascal), or MP/M
CPU	2x 2.048 MHz Zilog Z80 (one for the terminal)
Memory	RAM: 16 KB – 48 KB on main board, optional 16 KB memory card (max addressable: CP/M - 64 KB, HDOS - 56 KB)
Display	12" monochrome CRT, 80 x 25 character text
Sound	Beeper
Connectivity	3 serial, 1 Centronics parallel (optional), external diskette drive connector
Related	Heathkit H88

The Z-89 is a personal computer introduced in 1979 by Heathkit, but produced primarily by Zenith Data Systems (ZDS) in the early 1980s. It combined an updated version of the Heathkit H8 microcomputer and H19 terminal in a new case that also provided room for a built-in floppy disk on the right side of the display. Based on the Zilog Z80 microprocessor it is capable of running CP/M as well as Heathkit's own HDOS.