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The Model 4P (September 1983, Radio Shack catalog number 26-1080) is a self-contained luggable unit. It has all the features of the desktop Model 4 except for the ability to add two outboard floppy disk drives and the interface for cassette tape storage (audio sent to the cassette port in Model III mode goes to the internal speaker).
The same graphics board (catalog number 26-4104) could be fitted to the later Models 12 and 16. It came with a modified BASIC providing rudimentary screen drawing capabilities like line, box and circle drawing, shading and filling, a viewport capability and array transfer between graphics RAM and CPU RAM. [7]
A Disk/Video Interface expansion box was released in 1984, with one single-sided double-density 180 KB 5-1/4 inch disk drive and a CRT video adapter. This allows the Model 100 to display 40 or 80 column video on an external television set or video monitor.
Tandy/Radio Shack TRS-80 Model I. In the mid-1970s, Tandy Corporation's Radio Shack division was a successful American chain of more than 3,000 electronics stores. Among the Tandy employees who purchased a MITS Altair kit computer was buyer Don French, who began designing his own computer and showed it to the vice president of manufacturing John V. Roach, Tandy's former electronic data ...
TRS-80 was a brand associated with several desktop microcomputer lines sold by Tandy Corporation through their Radio Shack stores. It was first used on the original TRS-80 (later known as the Model I), one of the earliest mass-produced personal computers. [1]
The Rainbow was a monthly magazine dedicated to the TRS-80 Color Computer, a home computer made by Tandy Corporation (now RadioShack).It was started by Lawrence C. Falk [1] (commonly known as Lonnie Falk) and was published from July 1981 to May 1993 [2] by Falk's company, Falsoft, which was based in Prospect, Kentucky.
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The RadioShack TRS-80 Color Computer, later marketed as the Tandy Color Computer, is a series of home computers developed and sold by Tandy Corporation.Despite sharing a name with the earlier TRS-80, the Color Computer is a completely different system and a radical departure in design based on the Motorola 6809E processor rather than the Zilog Z80 of earlier models.