SigmaSoft and Systems

Location: Dallas, TX

Previous Location: Kingston, OK

H/Z89 Hardware

Interactive Graphics Controller/Pseudo Disk for H8-19, H88, and H/Z89-90, provides up to 640 x 500 pixel resolution, and advanced high-level graphics language interface, a RAM-based disk drive emulator, two graphics input device ports and two Centronics parallel printer prots. $495

SigmaSound Board (Less Joystick $95.00

Joystick Controllers (Set of Two) $25.00

SD.DVD Device Driver $10

Arcade Games Package (Requires Joysticks)

Universal Parallel Interface Board for H8, H88, H/Z89-90, provides eight high-speed parallel ports, two fo which are Centronics compatible for driving most printer types. $95

Contact: Clay D. Montgomery

Current Status: Assumed closed


Last Modified: Sunday, 05-Apr-2020 21:27:58 PDT

Contact Details

Mark Garlanger

Email: heathkit [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.