TRS-80 Model I

TRS-80 Model I was a pioneering home computer developed by Tandy Corporation and released in 1977, competing with other popular models like the Apple II and Commodore PET. The TRS-80 Model I was designed to be an affordable and user-friendly computer for the masses, with a price point of around $599, making it accessible to consumers like those who purchased the Sinclair ZX80 and Texas Instruments TI-99/4. This computer was widely popular among hobbyists and enthusiasts, including Steve Wozniak and Bill Gates, who were inspired by the Altair 8800 and Kenbak Computer. The TRS-80 Model I played a significant role in the development of the home computer market, influencing companies like Microsoft, IBM, and Apple Inc..

● Introduction

The TRS-80 Model I was introduced at a time when the home computer market was still in its infancy, with other notable models like the Atari 400 and Commodore VIC-20 also vying for attention. The computer was designed by Don French and Leonard Milner, who worked closely with Tandy Corporation to bring the product to market, drawing inspiration from earlier computers like the Datapoint 2200 and Wang 2200. The TRS-80 Model I was launched at the 1977 National Computer Conference in Dallas, Texas, where it generated significant interest among attendees, including Ed Roberts and Lee Felsenstein. The computer's success can be attributed to its affordability, ease of use, and the availability of a wide range of software applications, including games like Zork and Akalabeth, which were also popular on the Apple II and Atari 8-bit family.

● Hardware

The TRS-80 Model I was based on the Zilog Z80 microprocessor, which was also used in other popular computers like the CP/M and ZX Spectrum. The computer had 4 KB of RAM, which could be expanded to 16 KB or 48 KB, and 4 KB of ROM, which contained the Basic interpreter, similar to the Microsoft BASIC used in the Altair 8800. The TRS-80 Model I had a Cassette tape interface for storing and loading programs, as well as a RS-232 serial interface for connecting to other devices, such as the Teletype Model 33 and Modem. The computer's hardware was designed to be expandable, with a range of peripherals available, including the Tandy Expansion Interface and Tandy Color Computer, which were also compatible with the CoCo 2 and CoCo 3.

● Software

The TRS-80 Model I had a wide range of software applications available, including games, productivity tools, and programming languages, such as BASIC, Pascal, and Assembly language, which were also used on the Apple II and Commodore 64. The computer's BASIC interpreter was designed to be user-friendly, with a range of built-in commands and functions, similar to the Microsoft BASIC used in the Altair 8800 and IBM PC. The TRS-80 Model I was also compatible with a range of third-party software, including games like Defender of the Crown and Ultima IV, which were also popular on the Apple II and Commodore 64. The computer's software library was extensive, with many titles available from companies like Microsoft, Electronic Arts, and Activision, which also developed games for the Atari 2600 and Intellivision.

● History

The TRS-80 Model I was released in 1977 and was an instant success, with over 10,000 units sold in the first year, making it one of the best-selling computers of the time, along with the Apple II and Commodore PET. The computer was widely popular among hobbyists and enthusiasts, who appreciated its affordability and ease of use, including Steve Wozniak and Bill Gates, who were inspired by the Altair 8800 and Kenbak Computer. The TRS-80 Model I played a significant role in the development of the home computer market, influencing companies like IBM, Apple Inc., and Commodore International, which also developed the Commodore 64 and Amiga. The computer's success can be attributed to its innovative design, which was influenced by earlier computers like the Datapoint 2200 and Wang 2200, and its wide range of software applications, which were also available on the Apple II and Atari 8-bit family.

● Impact

The TRS-80 Model I had a significant impact on the development of the home computer market, influencing the design of later computers like the IBM PC and Apple Macintosh, which were also inspired by the Xerox Alto and Xerox Star. The computer's affordability and ease of use made it accessible to a wide range of users, including hobbyists, students, and professionals, who also used the Apple II and Commodore 64. The TRS-80 Model I also played a role in the development of the software industry, with many companies like Microsoft, Electronic Arts, and Activision creating software applications for the computer, which were also available on the Atari 2600 and Intellivision. The computer's legacy can be seen in the many modern computers and devices that have followed in its footsteps, including the Raspberry Pi and Arduino, which were also inspired by the Altair 8800 and Kenbak Computer.

Category:Home computers