December 6, 2018 – New Magazine and Video

• This Week in TRS-80 – December 3rd
• View here.
  • Model III/4 contrast and brightness controls
  • Orchestra 90 for the Model III/4
  • Serial port for the Model I

• TRS8Bit – December 2018
• Download here.
  • TRS-Image
  • Travelling Mav – A review of TA 2018
  • Christmas Wishes
  • Mavs Workshop – Model I Power Supply
  • Obituary – Paul Allen
  • Pick 2
  • The Great Snail Race – One Liner
  • In Mav’s Workshop – Daisy Wheel Printers
  • Flower Power – BASIC Program by George Philips
  • In Mav’s Workshop – 2019 Developments
  • Software Review – TBA (The BASIC Answer)

September 7, 2018 – Updated TRS-80 Emulator

George and Peter Phillips have released trs80gp version 2.0.4.

It features:
* Model II emulation (and Model I, III and 4 as previously)
* Hires graphics support
* Floppy and Cassette emulation
* Copy/Paste
* Software Keyboard
* Automatic keyboard input
* Turbo Mode
* Source-level debugging and many other programming features

It runs on Windows 10, 8, 7 and maybe even XP and Vista. Runs well under Wine on Mac and Linux

Learn more and get it at

September 6, 2018 – New Issue of TRS8Bit

Dusty has released the June 2018 issue of the TRS8Bit newsletter on the download page of his web site.


PAGE 04 Competition Entries and Result
PAGE 07 TRS80 GP v2.0.4 now released
PAGE 08 In Mav’s Workshop (DOM Cards)
PAGE 13 Palindromes – Do Geese See God
PAGE 15 In Mav’s Workshop (Tandy Assembly)
PAGE 21 The Way We Were – Two Chess Programs / LDOS
PAGE 37 In Mavs Workshop – Extender Boards
PAGE 43 EBAY U.K. Bargains
PAGE 46 In Mav’s Workshop – Printers – Part 6

May 23, 2018 – Frank Durda IV

Paul T Schreiber has some information that should be of interest to anyone with an interest in the TRS-80. Everything that says “I” below is Paul … this is a cut and paste …”

Some of you may be familiar with former Tandy R&D engineer Frank Durda IV who recently passed away.

Frank was a SW (and also a bit of HW) genius. Really. A more loyal Tandy employee/fanatic does not exist. And he kept EVERYTHING.

Frank left, most importantly, a wife and 4month old daughter, a daughter he never saw, or got to hold, as he was hospitalized during her birth and died, without regaining consciousness, soon after.

His wife Corrine now has the task to sort through Frank’s “collection”, which by my estimate, is over 300 file boxes of “stuff”. The Tandy stuff appears to range from Model 2/3 up to the AST computers (4000SX). I even uncovered a box of VIS hand controllers [shudder].

Frank and his team wrote the BIOS/drivers for probably 100 things, as well as TRS-DOS/LDOS/XENIX and so on.

It’s going to take MONTHS to get it all sorted (she lives about a 40min drive from me), today I just grabbed the first 12 boxes in the garage I could access (there was a 1964 Teletype machine in the way).

What I plan to go is sort as follows:

a) SW – floppies, SyQuest drives, 8mm tape. You name it, Frank has it.

b) HW – board add-in boards and full computers. I counted about 12 Tandy computers. There may be 50 more, I don’t know. There are 100s (yes 100s) of add-in boards.

c) books/manuals – I spotted several HW Reference manuals, a FORTRAN binder, and a photocopied dBase III manual. About 70% are Tandy originals, 30% copies.

What is the goal? The goal is 2-fold:

1 – Preservation

2 – raise funds for Frank’s wife & baby daughter

Now, as we all are aware, this stuff is HEAVY. I’m in Texas, and have Fed-Ex, UPS, and USPS options. In some cases, I will put individual items/small lots on eBay, but for the most part, this stuff will be sold by weight. Like $15/pound or some such. I some cases I will be specific, other cases might me a “treasure chest of Tandy Wonder”.

Now, I was 100% a HW designer at Tandy, but I have a few ex-R&D folks in my network I can see if they remember this stuff. If you are collecting ‘rare’ Tandy items, the 2nd box I looked in had 2 internal R&D use boards that were the audio and video portions of the Tandy Sensation! PC. Only 3 sets were made (2 for Tandy and 1 for MicroSoft) and Frank has a Tandy set (I even forgot I designed them!). These were used to write the drivers before the ‘real hardware’ was developed, and they were also used for the VIS development.

I hope to have ‘a new batch of stuff’ every 2-3 weeks. Mainly, I want this stuff to find “good homes”, not to be flipped. I want to be able to have a decent amount of $$$ for his family.

Lastly: Frank ran a few ISPs as well. I’m not an ‘IT Guy’ by a LONG shot. But he has 10-20 Cisco doo-dads as well (1U rack routers, etc). I’ll post a few photos for giggles, and next week hope to have the first batch for sale.

For those interested in helping Frank’s widow, please go the her GoFundMe page found at

May 23, 2018 – PLAYCAS Updated to v2.0

PLAYCAS allows you to connect a TRS-80 cassette input to a PC soundcard so as to capture the software for use in an emulator or archiving. Knut Roll-Lund has recently updated it to v2.0 with the following notes:

  • Old Play CAS unfortunately had a bug of type copy-paste. It could not load read-only cas files. Easy bugfix. This lead to me making a new vesion also changing the user interface a little and adding a feature. The save features was kind of hidden so adding a few buttons for this and removing my entries from the option menu.
  • Save text saves the anaysis content and may be used to detokenize basic for example or recover the source code for edtasm stuff.
  • Save wav saves the prepared wav based on your load (storing programs as wav is not efficient but might be convenient. This wav is kind of perfectly formed and better than anything from real cassette.
  • LNW 1kHz (new feature in 2.0) whenever enabled modifies the wav to go at double speed. So any TRS-80 with zip kit etc. at double speed can now load cassette without dropping to regular speed.
  • PLAYCAS can be downloaded from Knut’s web site here.