TRS-80 Microcomputer System Model II
TRS-80 was a brand associated with several desktop microcomputer lines sold by Tandy Corporation through their Radio Shack stores. The original "TRS-80 Micro Computer System" launched in 1977 (later known as the Model I) was one of the earliest mass-produced personal computers. The first units, ordered unseen, were delivered in November 1977, and rolled out to the stores the third week of December. The line won popularity with hobbyists, home users, and small-businesses. Tandy Corporation's leading position in what Byte Magazine called the "1977 Trinity" (Apple, Commodore and Tandy) had much to do with Tandy's retailing the computer through more than 3,000 of its Radio Shack storefronts. Notable features of the original TRS-80 included its full-stroke QWERTY keyboard, small size, its floating point BASIC programming language, an included monitor, and a starting price of $600 (equivalent to $2,230 in 2011). The pre-release price was $500 and a $50 deposit was required, with a money back guarantee at time of delivery. One major drawback of the original system was the massive RF interference it caused in surrounding electronics. Stricter FCC regulations on interference led to the Model I's replacement by the Model III.
By 1979, the TRS-80 had the largest available selection of software in the microcomputer market.
As well as the original Model I (and its compatible descendants), the TRS-80 name was later used as a generic brand on other technically-unrelated computer lines sold by Tandy, such as the TRS-80 Model II, TRS-80 Color Computer and TRS-80 Pocket Computer.
The Model II was introduced in May of 1979 and first shipped in October of 1979. The Model II, which included an 8" drive, sold for $3,450 and was a business computer.
CPU: Z-80A 8-Bit Processor (4.00 MHz)
Our unit has twin 8" disk drives was verykindly donated by Pat Dudman
Manufacturer: Radio Shack
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This exhibit has a reference ID of CH30931. Please quote this reference ID in any communication with the Centre for Computing History.