Tandy TRS-80 Pocket Computer PC-4

The Tandy PC-4 was a low-cost Casio-designed pocket computer offering ten labelled program areas and a compact implementation of BASIC. An optional memory module and matching cassette and printer accessories expanded its usefulness.

At $69.95 it moved Tandy’s pocket range closer to scientific-calculator pricing while retaining stored BASIC programs and string handling.

Notable Features

• The handheld uses Custom CMOS VLSI processor.
• Program and working memory was 1.9KB; optional 1KB module increases program capacity.
• Information is shown on 12-character alphanumeric LCD.

Historical Significance

• At $69.95 it moved Tandy’s pocket range closer to scientific-calculator pricing while retaining stored BASIC programs and string handling.
• The machine was manufactured for Radio Shack by a Japanese calculator or electronics company and given Tandy/TRS-80 branding.

Collector’s Notes

• LCD condition and battery leakage are the most important checks on surviving pocket computers.
• The matching printer, cassette interface, cables, manuals and memory modules make a more complete system.

Specifications

Technical Information
Name	Tandy TRS-80 Pocket Computer PC-4
Manufacturer	Tandy
Launched	Saturday, January 1, 1983
Launch Price	$69.95
Country	United States
CPU	Custom CMOS VLSI processor
Units Sold
Operating System	Pocket Computer BASIC
I/O	Proprietary printer and cassette expansion connection
Keyboard	53-key triple-mode alphabetic and numeric keyboard
Storage	Internal program memory; optional cassette and thermal-printer interfaces
Sound	Programmable beeper or key feedback where supported
Graphics	Character-oriented LCD with no general bitmap graphics
Display	12-character alphanumeric LCD
ROM	10KB ROM containing BASIC
RAM	1.9KB; optional 1KB module increases program capacity
CPU Speed	Clock speed not published