Compactor IV

Pascal Holdry has reverse engineered the Compactor IV card for the Model III. The Compactor IV permits 80×24 video and CP/M usage.

You can get more information about that here. The site is in French, but there is a translate pulldown box on the right.

DOSKEY for the Model 4

Michael McCarrick has developed a DOSKEY program for the Model 4. For those who do not know, DOSKEY was a program for MSDOS which would store all of your command lines, and allow you to recall them with the up and down arrow.

DOSKEY for the Model 4 can be installed as a Extended Command Interpreter by copying it over sys13/sys. You would then use *+ENTER to use it.

Source and instructions are included. You can download it from the Search Page.

M4ZVM Infocom Executor Updated to v4

Shawn Sijnstra has updated his Infocom z3, z4, z5, and z8 executor to version 4. Changelog:

  • Further speed improvements to core VM (various routines).
  • Fixed an issue with screen coordinate conversion (fixed getpos routine, impacted punyinform).
  • Ensured upper window now clips text on all rows.
  • Bugfix: Erase_window (-2) fixed to also erase upper window.
  • Bugfix: Timer code calculation error.
  • Changed timer to be 0.1 second. May be a bit ambitious on 4MHz CPU.
  • Bugfix: correctly reports a fail when switching to font 2 or 3 – fixes samegame.z5 (for example).
  • Change: Set interpreter to be DEC to allow option to play BeyondZork in either mode.

Full list of credits, features and issues as well as the source and compiled code are in the Gitlab page:

TRS-80 Trash Talk #40 is Out

Episode # 40 of the podcast TRS-80 Trash Talk is out now.

“In this episode we explain where we’ve been for the last 10 months since the last episode. We then go ahead and discuss the usual news and current events in the world of the TRS-80. We review Tandy Assembly 2021 and welcome George Phillips as a full-time Trash Talker. Then, we discuss a bunch of recent acquisitions. We also review the book “TRS-80 Color Computer Interfacing” and present some new calls for projects.”

You can download or listen at