The TRS‑80 Voice Synthesizer

The TRS‑80 Voice Synthesizer (catalog number 26-1180) was a speech synthesizer unit sold by Radio Shack. Introduced in 1979 for a price of $399.00, the unit was only compatible with the TRS‑80 Model I; Radio Shack never sold a TRS‑80 Model III version.

The TRS‑80 Voice Synthesizer plugged directly into the Model I expansion port and worked with both Level I and Level II BASIC systems. Like most voice synthesizers at the time, it worked by outputting words already broken into phonemes, or very small units of sound. It was described this way by the product introduction (under the headline of “Your TRS‑80 Speaks!”):

The FASTLOAD Cassette Interface

The FASTLOAD cassette interface used a novel (and patented) method of speeding up loading cassette programs on a TRS‑80 Model I. By using a specially modified cassette recorder permanently in fast-forward mode (the equivalent of the fast-forward button always being pressed), FASTLOAD increased cassette loading speeds up to sixteen times to as high as 8000 baud. FASTLOAD was introduced in 1981 by Personal Micro Computers, Inc. (also known as PMC) for a price of $188.00. The modified CTR-41 cassette recorder, required to use FASTLOAD, cost $95.00. Personal Micro Computers also sold FASTLOAD as an option for their PMC‑80 and PMC-81 Model I compatible computers.

The FASTLOAD cassette interface connected to the Model I I/O connector and used a built-in ROM to add a new cassette loading routine (mapped to the LOAD command), keyboard debounce routine, automatic key repeat, and a key click feature. Upon startup, a single SYSTEM command was required to enable the FASTLOAD interface routines.

The PMC MicroMate

The PMC MicroMate was a CP/M workstation introduced in April 1983 for the price of $1195.00, although that price was later reduced. It was sold by Personal Micro Computers, Inc, also known as PMC, already well known for the Model I compatible PMC‑80 and PMC-81 computers. Although the computer lines were not really equivalent, the MicroMate replaced both the PMC‑80 and PMC-81. The MicroMate was manufactured by PMC but also resold by TRIOS Micro Systems until late 1984 and was sometimes relabeled by them.

Super Utility Plus Special Edition

In late 1982, PowerSOFT began advertising the “Super Utility Plus Special Edition.” The package, sometimes referred to as “Super Utility Plus S/E,” was a premium limited-edition version of Super Utility. Only 500 packages were produced and each cost $500.00, including shipping. PowerSOFT took reservations for several months and began shipping on January 20, 1983.

Each Special Edition was numbered (1 to 500) and each was personally signed by Kim Watt. In addition to the Super Utility manual, it also came with two books:

The Assembly Line

“The Assembly Line” was a column about assembly language programming which first appeared in the April 1980 issue of 80 Microcomputing. It was written by William Barden, well known for his books about assembly language such as the Z80 Microcomputer Handbook, TRS‑80 Assembly Language Programming, and Programming Techniques for Level II BASIC. The first “Assembly Line” column began with these words:

This is the first of what I hope will be many columns devoted to TRS‑80 assembly language programming. Judging from articles I’ve read and comments I’ve heard at users’ groups, many of you are interested in assembly language. I’ll provide tutorial material on the more difficult aspects of assembly-language routines that you can use with BASIC programs or other assembly-language code.

Super Utility

I suspect that almost everyone who used a TRS‑80 disk system remembers Super Utility. First released by Kim Watt in 1980 through his company Breeze Computing, Super Utility was regarded by many to be an indispensible tool. It was described in advertisements as “The King of Utilities” and readers of 80 Micro must have agreed; they voted it 1st Place in the utility category for both the 1982 and 1983 Readers’ Choice Awards. According to one source, a copy of Super Utility was a required purchase for all United States government offices with a TRS‑80.

In all, there were versions of Super Utility for the TRS‑80 Model I, III, and 4, the Lobo MAX‑80, and the IBM PC. I think William D. Allen said it well in a 1983 review in 80 Micro:

This program is like a fire engine. You don’t need it every day, but when you do nothing else will do the job.

Cosmic Patrol

Cosmic Patrol was a TRS‑80 game written by Jake Commander, probably better known for his “Commander 80” column in 80 Micro. It was published by Wayne Green’s software company, Instant Software, costing $14.95 for a tape version and $19.95 for a disk version.

Cosmic Patrol appears to have been based on Cosmic Conflict!, a 1978 game written for the Magnavox Odyssey² home video game system. The goal is simple: destroy 15 vessels in the Quelon fleet before running out of E-units. Each game begins with 999 E-units. Each shot fired, whether it hits anything or not, costs ten E units.

The LNW80

The LNW80, sometimes referred to as the LNW80 Model 1, was the first in a line of TRS‑80 compatible computers sold by LNW Research Corporation (later known as LNW Computers). It was probably the most successful TRS‑80 compatible sold in the United States. LNW Research had already created the LNW System Expansion, a replacement for the Radio Shack Expansion Interface, so the LNW80 was in many ways a natural next step.

When the LNW80 was introduced in 1980 it was originally sold as a $89.95 “semi-kit,” with instructions and bare printed circuit board. The semi-kit price was so low because all of the electronic parts required for the kit had to be purchased separately. Careful shopping could help reduce costs, but the complete inventory of parts cost hundreds of dollars.

Despite the name, the LNW80 “semi-kit” was not a project for beginners; according to Dennis Báthory-Kitsz in his “80 Applications” column in 80 Micro there were 1,800 individual solder connections. For customers who wanted a complete computer, the LNW80 could also be purchased fully assembled, along with the LNW System Expansion, for $1450.00.


Asylum was the third game in the “Continuum series” of 3-D graphics adventures sold by Med Systems Software. It was preceded by Deathmaze 5000 and Labyrinth and followed by Asylum II. In early 1983, Med Systems Software changed its name to ScreenPlay (which was itself a division of Intelligent Statements, Inc) but continue to sell Asylum.

Med Systems Software sold Asylum for the TRS‑80 in both cassette and disk versions. The cassette version came in both 16K and 32K version. The 16K version contains the same puzzles, but the descriptive messages are shorter and the parser recognizes fewer words.

In addition to the TRS‑80 version, Asylum was also available for the Apple II for both tape and disk. However, the versions released in 1984 and 1985 for the Commodore 64, Atari 400/800, and IBM PC were not adaptations of the TRS‑80 version of Asylum. Those versions were actually adaptations of the TRS‑80 version of Asylum II.


The CHROMAtrs was a TRS‑80 Model I and III add-on that could display color text and graphics on a separate monitor or television. The CHROMAtrs had advanced graphics and sound features, but using those features required low-level programming that was beyond the abilities of many people. That all changed with the introduction of CHROMA BASIC.

CHROMA BASIC was written by Robert French, who was 14 years old at the time. It added over 68 commands to BASIC to manipulate the graphics, sound, and joystick features of the CHROMAtrs. Although originally priced at $30.00, CHROMA BASIC was soon bundled with the CHROMAtrs package and prominently featured in the advertisements.