Posts in the “Graphics” Category - page 2

The Mikrokolor Color Graphics Interface

The Mikrokolor was a color graphics interface for the TRS‑80 Model 100 that was sold by Andreasen’s Electronics Research & Development, Inc. The Mikrokolor hardware was designed by Paul Andreasen, the digital interface and graphics routines created by James Cole, and the software written by Andrew Baird. Andreasen’s Electronics Research & Development also sold versions of the Mikrokolor for the Model I, III, 4, and 12 and also the S-100 bus and the Apple II. There was also a $54.

The Micromint E-Z Color

Micromint sold several products for the TRS‑80 that were based on designs that Steve Ciarcia had presented in his Ciarcia’s Circuit Cellar column in Byte magazine. The Micromint E-Z Color was a color graphics interface for the TRS‑80 Model I and Model III that was based on his August 1982 column. In addition to the TRS‑80 version, there were also versions of the E-Z Color sold for the S-100 bus and the Apple II.


Probably the most popular of the TRS‑80 Model I and III color add-ons was the CHROMAtrs, introduced by South Shore Computer Concepts starting in 1982. It was available in several configurations:

a kit without case or power supply cost $99.00

a kit with case and power supply cost $129.00

a fully-assembled and tested unit cost $169.00

Each CHROMAtrs unit supported both the Model I or Model III and would work with either computer using the proper cable.

The Electric Crayon

Back in the late 1970’s, the Apple II and the TRS‑80 Model I were fierce competitors for computer sales. One advantage the Apple II had over the Model I was the ability to display color graphics. One of the first Model I productsto address this deficiency was the Percom Electric Crayon. Percom introduced the Electric Crayon in December 1979 for a base price of $249.00. It was featured on the cover of the January 1981 issue of 80 Microcomputing.

Mikeegraphic Graphic System

The Mikeegraphic Graphics System was a high-resolution graphics add-on for the TRS‑80 Model I and Model III. It was sold by Mikee Electronics Corporation for $340. Originally known as the Mikeeangelo when it was introduced in late 1981, the name was changed to Mikeegraphic just a few months later, presumably to avoid confusion with another product.


Many people considered the lack of high-resolution graphics to be the biggest deficiency of the TRS‑80 Model I. The maximum resolution of the Model I was 128 by 48 by using block graphics. Many games made good use of that resolution, but it was still low compared to other computers.

The 80-GRAFIX was one of several high-resolution add-ons available for the Model I. Designed by Ted Carter, it was originally sold by Programma International for $149.