January 17, 2022 – Newly Designed Power Supplies for 2022

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Jay Newirth has updated his power supply models for 2022.

New for 2022
DIRECT replacement POWER SUPPLIES using modern MEAN WELL power supply components are now available for the following TRS-80 models
  • Model 3
  • Model 4 NGA, 4 GA, 4D
  • Model 4P
No more blown RIFA’S or cold solder joints
No more video “spasms” when disk drive motors are activated
No more cold solder joints to cause potential problems
+12v supply for VIDEO are ISOLATED on alll models to completely eliminate video “spasms”

Model 3 unit has an ADDITIONAL +5v OUTPUT CONNECTOR and the Model 4 unit has (2) ADDITIONAL +5v OUTPUT CONNECTORS – perfect for powering Gotek/freHD/etc devices

All units are same size and design as the original (except for the 4P) and all units are SIMPLE DIRECT REPLACMENTS. Use the same original power cables that came in your machine

For pricing, photos or more information contact Jay Newirth (newSOFT) either at jaynewirth@verizon.net or https://www.plaidvest.com/newsoft/.

TRS80GP v2.4.5 Released

TRS80GP has been updated to v2.4.5. Release Notes:

New Features:

  • Lowe Electronics LS-18 Model I hires emulated (use -gl).
  • HyperMEM memory for Model 4 with -mem 256 (or 512 or 1024) or -mem hyper:512.
  • SuperMEM expansion memory for Model 4 with up to -mem super:1024 K.
  • MegaMEM expansion memory for Model 4 with up to -mem mega:16384 K.
  • Emulator extensions can now trigger audio and video recordings, screenshots.
  • Easy interface to emulator extensions from BASIC.
  • Added watch expressions to debugger.
  • Cassette counter and read/write indication in title bar during cassette I/O.

New Command Line Options:

  • Added ‘-ik row bits’ for automated control of low-level keyboard input.
  • Added ‘-ig’ to dump hires graphics memory.
  • Added -dNss, -dNds, -dNas to force floppy drive N to be single, double or any-sided.


  • Fixed hires memory debug view and dump.
  • Model I TRSDOS 2.3 patched. Pressing BREAK at first prompt no longer reboots.
  • Linux version no longer crashes on paste if the clipboard is empty.
  • Debug T-States/Cycles treats input as decimal instead of hex.
  • Mac version can save cassette output (.cas files) again.
  • Fix .bds load bug causing crashes on certain > 256 data lengths.
  • Stop right-hand glyph replacment when copying Model 3 Japanese unicode text.
  • 8″ drives default to restricting emulation to single or double sided.

Visit the TRS80GP Web Page for the download and information, or here for the emulator.

M4ZVM Infocom Executor Updated to v7

Shawn Sijnstra has updated his Infocom Executor to version 7. Changelog includes:

  • Added support for Infocom v7 Adventures (v7).
  • Added support for accented characters (v7).
  • Added support for Infocom v1 and v2 adventures (v6).
  • Lots of bug fixes and under the hood improvements.

Full list of credits, features and issues as well as the source and compiled code are in the Gitlab page: https://gitlab.com/sijnstra1/m4zvm.

TRS80-Tool Cassette Utility Updated to v2.3.0

Lawrence Kesteloot has updated his amazing TRS-80 Tool cassette utility to v2.3.0. This utility is fast becoming a replacement for all other cassette utilities. Recent changes added the following:

  • HEXDUMP command to displays a hex dump of the input file, with annotations.
  • DISASM command to disassemble CMD, 3BN, ROM, and BIN files (entry point can be configured).
  • –verbose flag to info command to display floppy geometry
  • SECTORS command to display a table of the sectors in a floppy disk (contents can be viewed as well).
  • Support for SCP SuperCard Pro raw flux floppy format.
  • ASM command to assemble a program into CMD, 3BN, CAS, or WAV files (baud rate for CAS and WAV can be configured)
  • RUN command to run a Model I/III/4, Level 1 or Level II Emulator.
  • Support for TRSDOS for Model I and 4, and for LDOS.

The standalone can be found on https://github.com/lkesteloot/trs80/tree/master/packages/trs80-tool. v2.3.0 can be downloaded there or, for windows, right here.