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Last modified 2026-02-01

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Heathkit H89

A picture of Heathkit H89

SPECIFICATIONS

GENERAL
Type:8-bit computer
CPU:Zilog Z80 @ 2 MHz
Operating system(s):MTR-88 monitor and HDOS (Heath DOS)
Memory:ROM: ? KB
RAM: 16-48 KB
Power supply:Mains
Current drain / power consumption:? W
Dimensions (W*H*D):? mm (?")
Weight:? Kg (? lb)




I/O
Keyboard:Integrated
Graphics: Integrated 12 inch monochrome CRT with 80*24 text only
Audio:No
Storage: Integrated 102 KB floppy drive
Optional tape recoder
External I/O ports:
RS-232C:   Optional
Other:




MISCELLANEOUS
Manufactured:USA, 1979-19xx (Discontinued)
Additional info:
Related documents:
Modifications and fixes:
Notable "ham" software:
Reviews:
Some options / Accessories:
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