Kres Engineering

Location: Anaheim, CA

H/Z89 Hardware

MH89 + 3 Bus Expander for H89/Z90, six-slot motherboard replaces right-side accessory areay and doubles expansion space. $125

PSGx2 - Multiple Chip Programmable Sound Generator Board for H89. $100

Software Products

Micro-Piano program (HDOS) lets you play polyphonic music from terminal keyboard. $24.95

Unit Conversion Master (CP/M) convert anything-to-anything calculator with over 550 units of measurement in 20 categories. $19.95

Micro-Piano program (HDOS) half-capabilty version, lets you play polyphonic music from terminal keyboard. $16.95


Contact: Diane Barron

Current Status: Assuming closed


Last Modified: Saturday, 17-Nov-2018 20:29:26 PST

Contact Details

Mark Garlanger

Email: mark [at] garlanger [dot] com

If you email me, PLEASE check your spam filter for any responses.




This site is dedicated to preserving the history of the original Heathkit computers. They were initially release in 1977 and included the 8-bit H-8 and 16-bit H-11 systems. The H89 was released in 1979.