TRS-80 Computers
The TRS-80 Micro Computer System (TRS-80; later known as the Model I to distinguish it from successors) is a desktop microcomputer launched in 1977 and sold by Tandy Corporation through their Radio Shack stores. The name is an abbreviation of Tandy/Radio Shack, Z-80 microprocessor. It was one of the earliest mass-produced and mass-marketed retail personal computers.

Notable features of the TRS-80 included its full-stroke QWERTY keyboard, its new Zilog Z80 processor (rather than the more common Intel 8080), 4K RAM standard memory (many 8-bit computers then shipped with only 1K RAM), small size and desk footprint, its floating-point BASIC programming language, an included 64 column video monitor, and a starting price of US$600 (equivalent to US$2400 in 2017).

An extensive line of upgrades and hardware peripherals for the TRS-80 was developed and marketed by Tandy/Radio Shack. The basic system could be expanded with up to 48K of RAM (in 16K increments), and up to four floppy disk drives and/or hard disk drives. Tandy/Radio Shack provided full service after-sales support including upgrade, repair, and training services in their thousands of stores worldwide.

By 1979, the TRS-80 had the largest selection of software in the microcomputer market. Until 1982, the TRS-80 was the best-selling PC line, outselling the Apple II series by a factor of 5 according to one analysis.

In mid-1980, the broadly compatible TRS-80 Model III was released. The Model I was discontinued shortly after, primarily due to stricter FCC regulations on the radio-frequency interference it caused in surrounding electronics. In April 1983 the Model III was in turn succeeded by the compatible Model 4.

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 Model 2000, TRS-80 Model 100, TRS-80 Color Computer and TRS-80 Pocket Computer.
* Information provided by Wikipedia

ManufacturerAtari, Inc. (1979–1984)
Atari Corporation (1984–1992)
TypeHome computer
Release dateNovember 1979
Introductory priceUS$550 (Atari 400, 1979)
US$1,000 (Atari 800, 1979)
DiscontinuedJanuary 1992; 26 years ago
Units sold4 million
Operating systemAtari 8-bit OS
CPUMOS Technology 6502B
@ 1.79 MHz (NTSC version)
@ 1.77 MHz (PAL version)
Graphics384 pixels per TV line
256 colors
8× sprites
raster interrupts
Sound4× oscillators with noise mixing
or 2× AM digital
Connectivity2× (or 4×) Joystick
1× Atari SIO
1× (or 0×) PBI
1× (or 0×) Composite Monitor
1× (or 2×) ROM cartridge
3/2/2024 - We have gone from 24 days behind on orders to about seven days as of today except for the few we are waiting on parts like the 5-pin DIN connectors. We expect to be pretty close to being caught up this weekend hopefully, if not, early next week. This of course depends on future orders but we are very close. Thank you for your patience!

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