The spotlight section provides a more detailed description, pictures, and information about a specific item in my collection. I'll try to update this regularly, but I'm not quite sure what the frequency will be. I will be covering a wide range of items, including hardware, software, manuals,  and magazines. 

11/18/2013 An H89 All-in-One computer with the TMSI H-1000 replacementt CPU board, and a bunch of push buttons


An H-89 with it's CPU board replaced by TMSI's H-1000 board showed up on ebay. They wanted $500 or best offer. After letting stay on ebay for more than a month, I offered $200, and it was accepted.

Details and pictures of the H89 with H-1000.

Past Spotlights

10/20/2012 - Heavily Modified H89 All-In-One Computer System

A very interesting H89 showed up on ebay, with two unique disk controllers, a unique memory board, a modified power supply, and the Kres backplate. The system did not power-up, but even though I already have several H89s, due to the unique boards, I ended up buying it for $200, including shipping.

Full details of the repair and restoration of this H89.

Future Plans

  • H89 with DG Super-89 and a Cleveland Codonics Graphics card.
  • H89 with MMS 128k RAM board running CP/M Plus.
  • H89 with MMS soft-sectored controller + a bunch of extra unique items.
  • H19 with Northwest Digital Graphics card.

Last Modified: Saturday, 24-Sep-2016 22:29:58 PDT

Contact Details

Mark Garlanger

Email: mark [at] garlanger [dot] com



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.