TRS-80 Model 4

The TRS-80 Model 4 is the last Z80-based home computer family by Radio Shack, sold from April 1983 through late 1991.

This article is about the TRS-80 Model 4s, successors to the Model III). For an overview of all computers using the TRS-80 and Tandy names, see List of TRS-80 and Tandy-branded computers.
TRS-80 Model 4
ManufacturerTandy Corporation
TypeHome and small business computer
Release dateApril 26, 1983 (1983-04-26)
Introductory price$1999 (64K, 2 floppy drives, RS-232C), $1699 (64K, 1 floppy drive, no RS-232C)
DiscontinuedLate 1991 (Late 1991)
Operating systemTRSDOS 6.2, LS-DOS 6.3, TRSDOS 1.3, LDOS 5.3, CP/M 2.2 or 3.0
CPUZilog Z80A @ 4 MHz, 6+ MHz with Z80B / Z80H, or HD64180 / Z180
Memory64 KB or 128 KB, 1 MB plus with third-party upgrades
DisplayModel 4 mode: 24 rows, 80 or 40 columns, Model III mode: 16 rows, 64 or 32 columns, block graphics
Graphicsoptional 640 by 240 pixels for $249 extra
Soundbeeper
Backward
compatibility		TRS-80 Model III
PredecessorTRS-80 Model III
Successornone
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