Cleveland Codonics


Imaginator I-100

Cleveland Codonics offered an add-on graphics card for the H/Z19 and H/Z89 systems call the Imaginator I-100.

  • High resolution of 504 x 247 pixels (monochrome).
  • Onboard microcomputer eliminates graphic processing load on host.
  • Two modes of operation - ASCII and binary.
  • They offered an option EPROM that allowed it to emulate a Tektronix 4010/4014.

A fully assembled and tested board sold for $445. In kit form it was $395. The Tektronix 4010/4014 emulation option was an additional $75. Mounting hardware needed for the H/Z-89 was an additional $20.

They also sold the related source code for $125. 

Personal Collection

I recently bought a H89 on ebay which contained the a Cleveland Codonics Imaginator board. The system was in poor condition and needs major cleaning and repair. I plan to have pictures and more details shortly.


Here is a scanned ad for the Imaginator I-100.


I don't have the actual manuals, but recently received scans of 3 documents and will post them if I receive permission from Codonics.

  • Installation Manual
  • User's Guide Manual
  • Addendum

Company Status

Still in business, now known simply as Codonics. The Imaginator was the company's first product and is on display in their office.

Last Modified: Saturday, 24-Sep-2016 19:37:46 PDT

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.