Tandy 102

[Vin82]

The Tandy 102, released in 1986, was a pioneering portable computer notable for its slim, lightweight design, full-size keyboard, and 8×40 character LCD screen. Its claim to fame was its exceptional portability, long battery life (20+ hours on 4 AA batteries), and built-in software suite—including a text editor, BASIC, and a modem—which made it especially popular among journalists and field professionals for on-the-go writing and transmitting stories over phone lines. As a refined successor to the Model 100, the Tandy 102 played a key role in the evolution of notebook computers and remains celebrated in computing history for its reliability and influence on mobile computing, achieving significant popularity in its era.

Manufacturer: Kyocera manufactured the Tandy 102 for Tandy Corporation (Radio Shack)
Type: Laptop
Model: 102
Release Date: 1986
Cost at release: USD $499 (CAD ~$1,700 adjusted for inflation)
MIPS: 0.35 (350 KIPS)

Hardware Specifications

CPU: Intel 80C85, 2.4 MHz
RAM: 24 KB (expandable to 32 KB)
ROM: 32 KB (contains built-in software)
Display: 8 lines × 40 characters LCD (240 × 64 pixel resolution)
Keyboard: Full-size, 56 keys
Storage: Built-in RAM, external cassette interface for data storage
Ports: RS-232 serial, parallel printer, cassette, system bus, phone/modem jack
Power: 4 × AA batteries (20+ hours typical use)
Weight: Approximately 1.4 kg (3.1 lbs)
Dimensions: 30.2 cm × 21.5 cm × 4.6 cm (11.9″ × 8.5″ × 1.8″)

Operating System & Programming Languages

Operating System: custom, menu-driven operating system stored in ROM. This system provided direct access to built-in applications such as a text editor (TEXT), telecommunications program (TELCOM), address book (ADDRSS), scheduler (SCHEDL), and a BASIC interpreter. The operating system was lightweight and designed for instant-on usability, with no conventional disk-based OS required.
Supported Languages:
- Microsoft BASIC: The primary and built-in programming language was Microsoft BASIC, accessible directly from the main menu. This interpreter allowed users to write, edit, and execute BASIC programs for a variety of tasks, including automation, data processing, and simple games.
- Assembly Language (Machine Code): Advanced users could write programs in assembly language for the Intel 80C85 processor. These machine code programs could be loaded and executed from RAM or ROM, though this required specialized knowledge and tools.
- Third-Party Languages/Extensions: While BASIC and assembly were the main options, some third-party ROMs and add-ons enabled support for additional languages or utilities, but these were uncommon and not officially supported by Tandy.

Notables

The Tandy 102’s CPU (Intel 80C85) was also used in NASA’s Mars Pathfinder Sojourner rover.
Its ROM software suite, including Microsoft BASIC, had contributions from Bill Gates himself.
The Tandy 102 could run for 20+ hours on just four AA batteries, making it exceptionally portable for its time.
It was a favorite among journalists, who used its built-in modem to file stories remotely from the field as early as the mid-1980s.
The Tandy 102 was thinner and lighter than its predecessor, the Model 100, and fixed the infamous “date-bug” calendar issue
Often called the “Model T” by enthusiasts—a nod to both its Model 100 lineage and its reputation as a workhorse of portable computing.
The original TRS-80 line, from which the Tandy 102 descends, was sometimes nicknamed the “Trash 80” by rival computer fans
Regarded as one of the first true notebook computers, the Tandy 102 helped define the portable computer market and is considered a proto-laptop

Donated by: Arlen Michaels

Vintage Computing Collection