Marcel Erz has just release a schematic to enable the connection of an original TRS-80 keyboard to a modern computer via USB which supports multiple TRS-80 models and various development boards for interfacing the keyboard with a system over USB.

You can find the GIT here

The next TRS-80 Trash Talk live show is Saturday, May 4, 2024 at 2:00PM Pacific Daylight Time / 5:00PM Eastern Daylight Time!

You can watch on the TRS-80 Trash Talk channel: https://www.youtube.com/channel/UCXkGugvdCkpkMDylVQb9gfg.

If you want to participate in the live zoom session, reach out to trs80trashtalk at gmail dot com for information.

George and Peter Phillips have updated their awesome TRS80GP emulator to v2.5.3. Changes are:

New Features:

• Model I/III/4 now accept .wav files as cassette input.
• Add -pp/-ppx options to control printer window pop-up.
• Model I RS-232 sense switches (thanks to Tuc for hardware tests).
• Add loopback device to RS-232 choices (-r :loop on command line)
• Add -rx option to disable RS-232 on Model I,2,III,4,12,16.
• Semigraphics 6 modes will display alternate palette (Electric Crayon, MC-10, CoCo).
• Add “-im disksummary” and disksummary on drive exports to output a summary of drive structure just like the Disk Viewer window.

Bug Fixes:

• $37EA and $37EB are now memory mapped printer port alises on Model I.
• Model I/III/4 RS-232 receive bug fixed.
• CoCo BASIC ROM 1.0 printer output fixed.
• Text pasting works for CoCo 1.0 and 1.1 ROMs.
• Printer auto-turbo works for all models now.
• Model 4 software keyboard no longer missing ‘+’ character on keycap.
• trs80gp -m1 -dx no longer loads lower case driver by default; use -lld to do so.

You can download it at George’s web site or by clicking here.

Version 2.5.3 of trs80gp has been released by brothers, George & Peter Phillips.

This software emulates TRS-80 Models 1, 2, 3, 4, 12, 16, 6000, MC-10, Color Computer, DT-1, and Radio Shack Videotex terminals.

The download zip file contains binaries to run on Windows, MacOS, Linux and Raspberry Pi.

Release Notes:
• Model 1, 3, 4 now accept .wav files as cassette input.
• Add -pp/-ppx options to control printer window pop-up.
• $317A and $317B are now memory mapped printer port aliases on Model I.
• Model 1 RS-232 sense switches (thanks to Tuc for hardware tests).
• Model 1/3/4 RS-232 receive bug fixed.
• Add loopback device to RS-232 choices (-r :loop on command line)
• Add -rx option to disable RS-232 on Model 1,2,3,4,12,16.
• CoCo BASIC ROM 1.0 printer output fixed.
• Text pasting works for CoCo 1.0 and 1.1 ROMs.
• Semigraphics 6 modes will display alternate palette (Electric Crayon, MC-10, CoCo).
• Printer auto-turbo works for all models now.
• Add “-im disksummary” and disksummary on drive exports to output a summary of drive structure just like the Disk Viewer window.
• Model 4 software keyboard no longer missing ‘+’ character on keycap.
• trs80gp -m1 -dx no longer loads lower case driver by default; use -lld to do so.

Get it at http://48k.ca/trs80gp.html

Lawrence Kesteloot has updated his TRS80TOOL to v2.7.0. Release Notes:

• In the run command, if the mounted floppy is modified, the changes will be written to the underlying virtual floppy file. Specify the –write-protected option to mount the floppy write-protected.
• The dir command has a new –system option to show system files.

You can download it at Lawrence’s web site or by clicking here.

Thanks to eagle eyed David S, I am told that Jens Guenther has updated his Windows/Linux fork of the SDLTRS Emulator to v1.2.29

Changelog:

• Added 1024 KB memory support for TCS Genie IIIs.
• Added 512 KB memory support for TRS-80 Model I Selector.
• Added 2nd printer MMIO for TRS-80 Model III/4/4P.
• Added more shortcuts for command line options.
• Added SDL2 aspect ratio option in GUI.
• Added debugger command to change Z80 HALT action.
• Fixed TRS-80 Model 4 MMIO in map 0.
• Fixed redraw of HRG1B screen.
• Fixed IMPORT.COM utility for CP/M 3.0.
• Fixed debugger alternate register set assignment by Nick Andrew.

You check it all out at https://gitlab.com/jengun/sdltrs/-/releases.

Steve H. has sent in a bunch of scans … Thank you, Steve!

Catalogs

Title: CLOAD Magazine
Publisher: CLOAD Magazine
Year: 19xx
Size: 709,924
Pages: 2

Title: Computer TEXTile Catalog
Publisher: Computer TEXTile
Year: 19xx
Size: 2,888,502
Pages: 6

Title: TRS Yellow Page
Publisher: Micro Architect
Year: 1978
Size: 2,581,055
Pages: 8
Notes: [78-11]

Magazines

Title: CLOAD Magazine 1978-08
Publisher: CLOAD Magazine Inc
Year: 1978
Size: 1,493,333
Pages: 4
Notes: [Set 2]

Title: Level One Magazine
Publisher: Level One Magazine
Year: 19xx
Size: 1,359,518
Pages: 4

Title: TRS-80 Computing
Issue: Vol 1 No 1
Publisher: Computer Information Exchange Inc
Year: 1978
Size: 16,654,542
Pages: 32

Service Manuals

Title: 16K RAM Expansion Service Manual Addendum
Publisher: Tandy
Year: 1978
Size: 758,978
Pages: 4
Notes: [26-1101]

Hardware Manuals

Title: Important Notice Regarding Model I Mini-Disk Drives
Publisher: Radio Shack
Year: 19xx
Size: 240,607
Pages: 1

Title: Model I Double Density System Start-Up
Publisher: Tandy
Year: 19xx
Size: 2,445,499
Pages: 2

Title: Oasis Systems Light Pen Users Manual
Publisher: Oasis Systems
Year: 1980
Size: 2,269,574
Pages: 11

After a LOT of work (including an entire new pass over the entire Level II ROM disassembly), I have completed a commented disassembly of BASIC/CMD as was packaged with TRSDOS v2.3

The disassembly of BASIC/CMD can be found here.

Quentin Barnes has updated the Catweasel Utilities to v4.10

New to this release are:

• Add -S option. This option allows the user to specify a minimum number of sectors per track and side. If that minimum is not reached during a read, it’ll trigger a retry.
• Extend the -x and -X option argument syntax when specifying a track range to also allow giving sides.
• Add partial support for RX02 in dmk2jv3.

The -S is a feature that I find to be a necessary evil. Many disks with issues can erroneously report an end of track data before all the retries are finished, and CW2DMK would then decide “Oh, OK – then this track is 7 good sectors” when it really is “7 good, 11 bad” that was just mishandled. With this, you can make a second pass that FORCES CW2DMK to keep re-reading until it either gets 18 good sectors or the retry count expires.

A ZIP file with the DOS, Linux, and Source Code can be downloaded here.

The main GITHUB can found at https://github.com/qbarnes/cw2dmk/.

Right now the following auctions are live.

• TRS-80 Book: TRS-80 Color Computer Technical Reference Manual
• TRS-80 Book: Custom TRS-80 and Other Mysteries (1st Ed)
• TRS-80 Book: Level 1 User’s Manual
• TRS-80 Book: TRS-80 Interfacing, Book 1 (1st Ed 2nd Printing)
• TRS-80 Book: TRS-80 Interfacing, Book 1 (1st Ed 4th Printing)
• TRS-80 Book: TRS-80 Programs
• TRS-80 Book: TRS-80 Micro Computer Technical Reference Manual (1st Ed)
• TRS-80 Book: TRS-80 Model III Operation and BASIC Reference Manual
• TRS-80 Book: VisiCalc for the TRS-80 Model I and Model III Computers
• TRS-80 Book: The Z-80 Microcomputer Handbook
• TRS-80 Software: Cosmic Patrol (c) Instant Software
• TRS-80 Software: Dancing Demon (c) Tandy
• TRS-80 Software: Easy Calc (c) Instant Software
• TRS-80 Software: Invasion Force (c) Tandy
• TRS-80 Software: Keyboard Debounce / Real Time Clock (c) Tandy
• TRS-80 Software: T-Bug (c) Tandy
• TRS-80 Software: Visicalc Model I (c) Personal Software / Tandy
• TRS-80 Software: Model I Double Density Disk Systems DOS and Owner’s Manual (c) Tandy
• TRS-80 Software: Defense Command / Stellar Escort (c) Big Five / Tandy
• TRS-80 Software: Editor/Assembler (c) Tandy