TRS-80 Color Computer

TRS-80 Color Computer
Bilby · CC BY 3.0 · source
Name	TRS-80 Color Computer
Aka	CoCo
Manufacturer	Tandy Corporation
Type	Home computer
Release	1980
Discontinued	1991
Cpu	Motorola 6809E
Memory	4–64 KB RAM
Os	Color BASIC, OS-9
Display	Motorola MC6847 VDG
Sound	Internal speaker
Media	Cassette tape, floppy disk
Predecessor	TRS-80 Model I
Successor	Tandy 1000

TRS-80 Color Computer was a line of Motorola 6809E–based home computers sold by Tandy Corporation through its RadioShack retail chain beginning in 1980. Positioned alongside machines such as the Commodore 64, Apple II, and Atari 8-bit family, it targeted hobbyists, educators, and small businesses seeking affordable graphics and BASIC programming. The platform influenced hobbyist communities associated with BYTE (magazine), Compute!, and retailers such as RadioShack while coexisting with contemporaries like the TI-99/4A and Sinclair ZX Spectrum.

History

Introduced by Tandy Corporation following earlier products like the TRS-80 Model I and TRS-80 Model III, the system's development drew on the microprocessor work of Motorola and the marketing strategies of Charles Tandy. Announced at trade shows frequented by attendees from Consumer Electronics Show and covered by publications including Popular Electronics and Electronic Games, it arrived amid competition from IBM PC derivatives and machines from Apple Inc. and Commodore International. Early adoption was driven by educational purchases influenced by districts that had already leased Apple II units and by hobbyists active in user groups such as the Homebrew Computer Club and regional computer club chapters. Over successive revisions, Tandy collaborated with partners including Microware to provide advanced multitasking environments inspired by systems like UNIX System V and systems programming trends led by researchers at Bell Labs. The product lifecycle paralleled shifts in retail strategy at RadioShack and corporate changes culminating in the broader PC-compatible era dominated by Microsoft and IBM-compatible vendors.

Hardware

The architecture centered on the Motorola 6809E CPU, a design contemporary with processors from Intel Corporation and Zilog such as the Intel 8088 and Zilog Z80. Its video capabilities relied on the Motorola MC6847 Video Display Generator, producing color graphics competitive with offerings from Texas Instruments and Motorola-based arcade hardware used by companies like Atari, Inc. and Sega. Memory configurations ranged from 4 KB to 64 KB RAM, paralleling modules sold by firms such as Microsystems International and Western Digital. Storage used compact cassette interfaces similar to peripherals from Commodore and Atari, while later floppy disk systems used controllers analogous to those by Tandon Corporation and drives marketed by Seagate Technology. Input devices included keyboards influenced by designs from IBM and peripherals compatible with standards supported by IEEE-affiliated manufacturers. Expansion buses allowed third-party add-ons from companies like Percom Data Corporation and Radio Shack vendors.

Operating Systems and Software

Firmware shipped with Microsoft-derived BASIC interpreters branded as Color BASIC, reflecting partnerships akin to those between Microsoft and OEMs such as Apple Computer and IBM PC. Third-party operating systems like OS-9 were offered by Microware, borrowing concepts from UNIX and enabling multitasking on the 6809 architecture. Software libraries included titles ported from publishers such as Sierra On-Line, Broderbund, Electronic Arts, and hobbyist listings in magazines like Compute! and Creative Computing. Educational packages competed with curricula used on Apple II systems in schools and productivity titles rivaled office suites available for IBM PC compatibles. Development tools and assemblers came from companies including LNW Research and small publishers featured in Antic (magazine)-style coverage.

Peripherals and Expansion

A range of peripherals mirrored the ecosystem growth seen with the Commodore 64 and Atari lines: floppy disk drives, printers from Epson and Canon, modem kits interoperable with bulletin board systems popularized by CBBS and FidoNet, and speech synthesizers similar to products from Texas Instruments and Votrax. Expansion chassis and memory boards were produced by third parties such as Intertec and hobby vendors featured in BYTE (magazine). Graphics upgrade cartridges and sound modules paralleled add-ons for systems like the Sinclair ZX Spectrum and Nintendo Entertainment System accessories, while networking and multi-user expansions echoed academic projects at institutions like Massachusetts Institute of Technology and Stanford University in earlier microcomputer research.

Reception and Legacy

The platform received contemporary reviews alongside comparisons to the Apple II Plus, Commodore PET, and Atari 400/800 in periodicals such as PC Magazine, InfoWorld, and Creative Computing. It cultivated a dedicated user community that contributed to software archives and newsletters similar to the ecosystems around Amiga and Atari ST systems. Influential hobbyist developers and small publishers who started on this and peer platforms later joined companies like Microsoft, Sierra On-Line, and Electronic Arts, reflecting industry mobility seen in histories of Silicon Valley startups. The machine's preservation is supported by museums and archives akin to the Computer History Museum and efforts by retrocomputing groups across regions including United States and Europe. Its role in democratizing access to programming tools aligns with the broader microcomputer revolution alongside milestones such as the Altair 8800 and the proliferation of personal computing driven by firms like IBM and Apple Inc..

Category:Home computers Category:RadioShack products