TRS-80 News

February 24, 2026 - Original Model III LDOS Manual / Binder / Disk

So that it doesn't get lost in all the re-listings, one of the items I have up on eBay is for LDOS v5.1.3 for Model III (Original Binder/Manual/Software).

Link is here.

February 21, 2026 - TRS-80 Trash Talk Live # 47 Starts Soon

The next TRS-80 Trash Talk live show is TODAY, February 21, at 6:00PM Pacific Daylight Time / 9:00PM 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.

February 21, 2026 - eBay Auctions

Some items I have on eBay to support the site ...

Books

DescriptionItemEnd Time
TRS-80 Applications Sourcebook, Vol II and TRS-80 Sourcebook for Educators17788107590002/28/2026 07:26 AM
TRS-80 Book - TRS-80 Data File Programming for the Model I/III17788017259302/27/2026 10:26 PM
TRS-80 Book - TRS-80 Graphics17788017626402/27/2026 10:26 PM
TRS-80 Book - TRS-80 Micro Computer Technical Reference Handbook, 1st Edition17788011323702/27/2026 10:26 PM
TRS-80 Book - TRS-80 Programming in Style17788009899502/27/2026 09:26 PM
TRS-80 Book - TRS-80 Programs17788009714102/27/2026 09:26 PM

Software

DescriptionItemEnd Time
TRS-80 Software - LDOS v5.1.3 for Model III (Original Binder/Manual/Software)17788185980902/28/2026 02:17 PM
TRS-80 Software - BlackJack and Backgammon - Manual/Tape (Original)17788109397702/28/2026 07:26 AM
TRS-80 Software - Scripsit Training Program - Manual/Tapes (Original)17788108091802/28/2026 07:26 AM
TRS-80 Software - Upper/Lower Case Driver - Manual/Tape (Original)17788108956402/28/2026 07:26 AM
TRS-80 Software - Budget Management (Original Binder/Manual/Tapes17787988819002/27/2026 07:26 PM
TRS-80 Software - Business Payroll (Original Binder/Manual/Tapes)17787977088702/27/2026 06:26 PM
TRS-80 Software - Cassette Portfolio Analysis (Original Binder/Manual/Tapes)17787987098202/27/2026 07:26 PM
TRS-80 Software - Cross Reference Utility (Manual/Tape)17788007025902/27/2026 09:26 PM
TRS-80 Software - Keyboard Debounce and Real-Time Clock (Manual/Tape)17788010939502/27/2026 09:26 PM
TRS-80 Software - Level II BASIC Instruction Course - Parts 1 and 2 (Original)17788015181102/27/2026 10:26 PM
TRS-80 Software - Personal Finance and Business Finance for the PC-217788016708702/27/2026 10:26 PM
TRS-80 Software - Statistical Analysis (Original Binder/Manual/Tapes)17788013372302/27/2026 10:26 PM

Other

DescriptionItemEnd Time
Apple II Software - The Word Handler II / List Handler / Spell Handler17788172444302/26/2026 01:26 PM

February 18, 2026 - New Software from Irwin Burton

Irwin has written two DiskDisk related programs. He writes:

CDD/CMD v2.0.0 is a little utilty to use with the DiskDisk utility from MISOSYS that allows us to emulate the MS-DOS CD command. I wanted to be able to change DiskDisks as easy as I change subdirectories on MS-DOS.
Usage: CDD [:dn] DDfilespec
Where DDfilespec is the name of the DiskDISK file you want to mount. and :dn is an optional drive number you want to use for that file. The default is :4.

RMD/CMD v2.0.0 allows for the DISABLE to disable not just a DiskDISK mounted at :4, but the user is now free to disable a DiskDISK no matter which drive it is mounted to.
Usage: RMD [:dn]

Download Links:

February 17, 2026 - New Software from Ian Mavric

Ian Mavric was kind enough to send over some missig items! Thank you, Ian!

Title:BMON Basic Monitor v1.2

Title:BPA Basic Programming Assistant

Title:Life: BASIC Version

Title:Life: Machine Language Version

Title:Misosys Disassembler v1.2

Title:Skirmish-80

Title:Space Games 3

Title:Z80 Disassembler

February 9, 2026 - Two Dutch TRS-80 Manuals

Cris Peeters has kindly provided the following manuals in Dutch

Title:LS-DOS 6.3 Update for TRSDOS 6.2XPublisher:TandyYear:19xxSize:86,033,395Catalog:706-2292Pages:27OCRed:YesNotes:Dutch

Title:Model 4-4P Disk SystemPublisher:TandyYear:19xxSize:942,792,899Catalog:701-1069-1080Pages:510OCRed:YesNotes:Dutch

February 6, 2026 - Popular Computing Newsletter

GrumpyX has kindly provide an issue of the opular Computing Newsletter

February 5, 2026 - Assorted Radio Shack Memos

GrumpyX has kindly provide a whole bunch of Radio Shack related scans ...

Title:Product Flyer - Carry In Service ContractPublisher:Radio ShackYear:1979Size:61,313Pages:1OCRed:Yes

Title:Product Flyer - Cobol Development System Model IIPublisher:Radio ShackYear:19xxSize:209,970Pages:4OCRed:YesNotes:26-4703

Title:Product Flyer - Fortran Development System Model IIPublisher:Radio ShackYear:19xxSize:247,816Pages:4OCRed:YesNotes:26-4701

Title:Product Flyer - Model II LeasingPublisher:A and A FinancialYear:19xxSize:827,162Pages:2OCRed:Yes

Title:Product Flyer - Network IPublisher:Radio ShackYear:19xxSize:433,883Pages:2OCRed:YesNotes:26-1210

Title:Radio Shack TRS-80 Software LibraryPublisher:Radio ShackYear:19xxSize:57,940Pages:1OCRed:YesNotes:Introduction to BASIC Part I / 26-2150

Title:Radio Shack TRS-80 Update 1978-02Publisher:TandyYear:1978Size:475,923Pages:4OCRed:YesNotes:07-05-1978

Title:Radio Shack TRS-80 Update 1978-03Publisher:TandyYear:1978Size:239,398Pages:2OCRed:YesNotes:08-10-1978

Title:Radio Shack TRS-80 Update 1979-09Publisher:TandyYear:1979Size:533,328Pages:4OCRed:YesNotes:09-28-1979

Title:Radio Shack TRS-80 Update 1979-10Publisher:TandyYear:1979Size:205,569Pages:2OCRed:YesNotes:10-16-1979

Title:Radio Shack TRS-80 Update 1979-11Publisher:TandyYear:1979Size:206,632Pages:2OCRed:YesNotes:10-31-1979

Title:Radio Shack TRS-80 Update 1979-12Publisher:TandyYear:1979Size:473,357Pages:6OCRed:YesNotes:11-15-1979

Title:Radio Shack TRS-80 Update 1979-13Publisher:TandyYear:1979Size:210,533Pages:2OCRed:YesNotes:12-03-1979

Title:Radio Shack TRS-80 Update 1979-14Publisher:TandyYear:1979Size:310,611Pages:4OCRed:YesNotes:12-31-1979

Title:Radio Shack TRS-80 Update 1980-04Publisher:TandyYear:1980Size:147,613Pages:2OCRed:YesNotes:02-01-1980

Title:Radio Shack TRS-80 Update 1980-05Publisher:TandyYear:1980Size:83,878Pages:1OCRed:YesNotes:02-04-1980

Title:Radio Shack TRS-80 Update 1980-09Publisher:TandyYear:1980Size:372,188Pages:4OCRed:YesNotes:04-02-1980

Title:Radio Shack TRS-80 Update 1980-10Publisher:TandyYear:1980Size:285,200Pages:4OCRed:YesNotes:04-07-1980

Title:Radio Shack TRS-80 Update 1980-11Publisher:TandyYear:1980Size:337,548Pages:4OCRed:YesNotes:04-29-1980

Title:Radio Shack TRS-80 Update 1980-13Publisher:TandyYear:1980Size:386,403Pages:4OCRed:YesNotes:06-27-1980

Title:Radio Shack TRS-80 Update 1980-14Publisher:TandyYear:1980Size:341,911Pages:4OCRed:YesNotes:07-07-1980

Title:Radio Shack TRS-80 Update 1980-16Publisher:TandyYear:1980Size:611,867Pages:8OCRed:YesNotes:09-01-1980

Title:Radio Shack TRS-80 Update 1980-17Publisher:TandyYear:1980Size:378,338Pages:4OCRed:YesNotes:09-12-1980

Title:Radio Shack TRS-80 Update 1980-18Publisher:TandyYear:1980Size:595,581Pages:8OCRed:YesNotes:10-09-1980

Title:Radio Shack TRS-80 Update 1980-20Publisher:TandyYear:1980Size:338,670Pages:4OCRed:YesNotes:11-26-1980

Title:Radio Shack TRS-80 Update 1980-22Publisher:TandyYear:1980Size:722,752Pages:8OCRed:YesNotes:12-24-1980

Title:Radio Shack TRS-80 Update 1981-01Publisher:TandyYear:1981Size:312,942Pages:4OCRed:YesNotes:01-14-1981

Title:Radio Shack TRS-80 Update 1981-02Publisher:TandyYear:1981Size:166,877Pages:2OCRed:YesNotes:01-21-1981

Title:Radio Shack TRS-80 Update 1981-03Publisher:TandyYear:1981Size:358,883Pages:4OCRed:YesNotes:02-03-1981

Title:Radio Shack TRS-80 Update 1981-06Publisher:TandyYear:1981Size:373,943Pages:4OCRed:YesNotes:04-01-1981

Title:Radio Shack TRS-80 Update 1981-07Publisher:TandyYear:1981Size:357,870Pages:4OCRed:YesNotes:04-23-1981

Title:Radio Shack TRS-80 Update 1981-08Publisher:TandyYear:1981Size:379,310Pages:4OCRed:YesNotes:05-08-1981

Title:Radio Shack TRS-80 Update 1981-09Publisher:TandyYear:1981Size:378,102Pages:4OCRed:YesNotes:05-18-1981

Title:Radio Shack TRS-80 Update 1981-10Publisher:TandyYear:1981Size:329,809Pages:4OCRed:YesNotes:06-03-1981

Title:Radio Shack TRS-80 Update 1981-11Publisher:TandyYear:1981Size:82,093Pages:2OCRed:YesNotes:06-15-1981

Title:Radio Shack TRS-80 Update 1981-12Publisher:TandyYear:1981Size:60,460Pages:2OCRed:YesNotes:06-24-1981

Title:Radio Shack TRS-80 Update 1981-13Publisher:TandyYear:1981Size:179,064Pages:2OCRed:YesNotes:06-29-1981

Title:Radio Shack TRS-80 Update 1981-14Publisher:TandyYear:1981Size:135,527Pages:2OCRed:YesNotes:07-08-1981

Title:Radio Shack TRS-80 Update 1981-18Publisher:TandyYear:1981Size:181,324Pages:2OCRed:YesNotes:08-12-1981

Title:Radio Shack TRS-80 Update 1981-21Publisher:TandyYear:1981Size:191,934Pages:2OCRed:YesNotes:09-08-1981

Title:Radio Shack TRS-80 Update 1981-22Publisher:TandyYear:1981Size:212,757Pages:2OCRed:YesNotes:09-29-1981

Title:Radio Shack TRS-80 Update 1981-23Publisher:TandyYear:1981Size:212,395Pages:2OCRed:YesNotes:10-09-1981

Title:Radio Shack TRS-80 Update 1981-27Publisher:TandyYear:1981Size:211,238Pages:2OCRed:YesNotes:11-06-1981

Title:Radio Shack TRS-80 Update 1981-31Publisher:TandyYear:1981Size:228,069Pages:2OCRed:YesNotes:12-18-1981

Title:Radio Shack TRS-80 Update 1982-01Publisher:TandyYear:1982Size:267,637Pages:2OCRed:YesNotes:01-07-1982

Title:Radio Shack TRS-80 Update 1982-02Publisher:TandyYear:1982Size:226,611Pages:2OCRed:YesNotes:01-21-1982

Title:Radio Shack TRS-80 Update 1982-03Publisher:TandyYear:1982Size:225,192Pages:2OCRed:YesNotes:02-22-1982

Title:Radio Shack TRS-80 Update 1982-04Publisher:TandyYear:1982Size:292,951Pages:3OCRed:YesNotes:03-08-1982

Title:Radio Shack TRS-80 Update 1982-05Publisher:TandyYear:1982Size:540,253Pages:5OCRed:YesNotes:04-06-1982

Title:Radio Shack TRS-80 Update 1982-06Publisher:TandyYear:1982Size:386,402Pages:4OCRed:YesNotes:04-27-1982

Title:Radio Shack TRS-80 Update 1982-07Publisher:TandyYear:1982Size:456,079Pages:4OCRed:YesNotes:05-24-1982

Title:Support Group ListPublisher:TandyYear:1983Size:203,572Pages:2OCRed:Yes

Title:Thank You for Tampa Computer ShowPublisher:TandyYear:1980Size:257,516Pages:1OCRed:Yes

Title:TRS-80 Merchandising Memo 81-09 [700 Series Software Items]Publisher:TandyYear:1981Size:99,584Pages:1OCRed:YesNotes:700 Series Software Items

Title:TRS-80 System Selection GuidePublisher:TandyYear:19xxSize:60,836Pages:1OCRed:Yes

February 2, 2026 - Some news updates

  • TRS-IO v1.1 Tuc has TRS-IO++ fully assembled boards in stock and ready for immediate shipping. Visit his site for more information.
  • Dusty MX Keyboard Dusty2050 has TRS-80 Model I keyboards based on MX keys for sale. Visit his DustysVintageWorkshop ebay store.
  • KiwiSinceBirth has pointed out that his Model I and Model III updated ROMs come with 16 pre-built configurations as well as source code, for those daunted by the compilation process
  • NameIt Screenshot Irwin Burton has written two new TRS-80 Model III programs - NAMEIT and PWD. NameIt allows for all characters to be in a LDOS disk label and PWD (like the unix command) will give you a quick update of what disk is mounted in a drive number. Source is included.
  • The next TRS-80 Trash Talk (#47!) is scheduled for Saturday, February 21, 2026 at 6:00PM Pacific Daylight Time. To watch, visit https://www.youtube.com/@TRS80TrashTalk. If you want to participate, reach out for the zoom link.

January 28, 2026 - Compilable Model I/III Level II ROM Source Code

KiwiSinceBirth has posted updates to his compilable source file for the Model I/III ROM

He has a traditional Model I Level 2 BASIC ROM and Model III Level 2 BASIC ROM which have comments and which can be compiled into a workable ROM. His source differs from a standard disassembly in the following ways

  • Replaced all disassembler generated labels with meaningful labels.
  • Ensured all jumps (JR and JP) reference valid code labels.
  • Replaced all 3xxxH hardware references with .EQU definitions.
  • Replaced all 4xxxH buffer references with .EQU definitions.
  • Replaced all xxH byte references with appropriate decimal or ascii values, and/or .EQU definitions.
  • Replaced all generated op-code with Byte .DB .DW definitions for DataTables/Text/Constants/Etc
  • Added code documentation from various sources at the code block / function level.
  • Replaced incorrect op-codes, where Better Else "Trick" was used.

These ROMs can also be somewhat customized as follows:

#DEFINE VER12uncomment this to degrade from V1.3 to V1.2 of the ROM.
#DEFINE VER13this is the default if VER12 is not defined, and doesnt need to be uncommented
#DEFINE EACA80uncomment to enable Dick Smith System-80 (EACA) hardware support. NOTE: While not mandatory you should also define VER12 since the System-80 ROM was based on V1.2. V1.3 has not been formally tested, but assume should work, and opens ability to also specify FREHDBT. This only targets the core 12kb ROM, and does not include the latter Rom extensions
#DEFINE FREHDBTEnables the FreHD auto boot feature, i.e. the Auto boot ROM. This requires version 1.3 ROM as a base, please do NOT define VER12 as it is not compatible (it will be ignored anyway) Consider also enabling NMIHARD to ensure reset (on non-floppy machine) will force a reset.
#DEFINE NMIHARDSet NMI (reset) as always perform a hard reset. Normally on non-floppy systems NMI performs a soft reset returning to the READY> prompt with the basic program intact. This is useful in system without floppy disk to force a full reset (0066h)
#DEFINE LOWCASEDisable Alpha character translation of letters A-Z,a-z to the values on range 00h to 1Fh. This is useful when a lower case mod is installed, but an alternate video driver has not been installed, or where the font rom on the machine has the alternate characters in the 00h 1Fh range (0471h)
#DEFINE FASTMEMSpeed up startup memory size check by checking first byte of every 256 page, rather than every byte.
#DEFINE BUGFIX5Fix Error 5 - 08A7H - INT(DoubleValue) rounding
#DEFINE BUGFIX8Fix Error 8 - 1009H - PRINT USING, - sign at end of field
#DEFINE PATCHIncludes NMIHARD, LOWCASE, FASTMEM, BUGFIX5, and BUGFIX8`
#DEFINE SIZE16KWill pad the end of the rom with $FF to 16KB size. useful if want to append multiple ROM images for used in large 16K paged rom
#DEFINE _EMBEDStrip all HW, and IO routines leaving just BASIC language as standalone code and used in L2 Basic for CP/M

He has also developed an enhanced ROM for both machines which have slightly broken compatibility, but which otherwise include new support, features, and some bug fixes

#DEFINE NEWBOOTEnables a new boot routine which asks for "diskette?" when no disk is detected and retries. It also allows for break to be pressed at any time. (Credit : John Swiderski)
#DEFINE FREHDBTEnables the FreHD auto boot feature, i.e. the Auto boot ROM. This requires version 1.3 ROM as a base, please do NOT define VER12 as it is not compatible (it will be ignored anyway) Consider also enabling NMIHARD to ensure reset (on non-floppy machine) will force a reset.
#DEFINE NOMEMSIZESkip user input of Memory Size? override at startup with M key. (Credit : John Swiderski)
#DEFINE FASTMEMSpeed up startup memory size check by checking first byte of every 256 page, rather than every byte.
#DEFINE NMIHARDSet NMI (reset) as always perform a hard reset. Normally on non-floppy systems NMI performs a soft reset returning to the READY> prompt with the basic program intact. This is useful in system without floppy disk to force a full reset (0066h)
#DEFINE LOWCASEDisable Alpha character translation of letters A-Z,a-z to the values on range 00h to 1Fh. This is useful when a lower case mod is installed, but an alternate video driver has not been installed, or where the font rom on the machine has the alternate characters in the 00h 1Fh range (0471h)
#DEFINE MSGSTARTEnhanced startup message showing Free Bytes available to BASIC
#DEFINE KEYBOUNCEEnables the Keyboard debounce routines that where introduced in rev1.3
#DEFINE BUGFIX1Fix Error 1 - 04F6H - 32 Character Mode Line Length
#DEFINE BUGFIX2Fix Error 2 - 153EH - Random Number Single Precision Overrun
#DEFINE BUGFIX5Fix Error 5 - 08A7H - INT(DoubleValue) rounding
#DEFINE BUGFIX7Fix Error 7 - 0EF2H - Space after type declaration tag
#DEFINE BUGFIX7CFix Error 7C - 213DH - Space after TAB token
#DEFINE BUGFIX8Fix Error 8 - 1009H - PRINT USING, - sign at end of field
#DEFINE BUGFIX11Fix Error 11 - 2301H - Overflow on Integer FOR loop
#DEFINE BUGFIX13Fix Error 13 - 1222H - Display of Single Precision Numbers
#DEFINE EACA80(OPTIONAL) uncomment to enable Dick Smith System-80 (EACA) hardware support. This only targets the core 12kb ROM, and does not include the latter Rom extensions
#DEFINE SIZE16K(OPTIONAL) Will pad the end of the rom with $FF to 16KB size. useful if want to append multiple ROM images for used in large 16K paged rom

To make room for all this, cassette support has been removed.

Additionally, you can now download pre-built binary images for most common configurations. There are 16 variants. Hr did this to make it easier to use, no assembly required, no defines to understand, just choose the ROM that makes sense. It also means the vanilla configurations can be compared against official roms, to check for binary compatibility. This build process is automated by GITHub anytime a change is made, it will assemble and publish a new release.

  • Dick Smith System 80 (Official)
  • Dick Smith System 80 FreHd Patched
  • Dick Smith System 80 Patched
  • Model I Rev 1.2 (Official)
  • Model I Rev 1.3 - FreHD Patched
  • Model I Rev 1.3 - Patched
  • Model I Rev 1.3 (Official)
  • Model I Rev 1.4 (Enhanced 50Hz)
  • Model I Rev 1.4 (Enhanced)
  • Model I Rev 1.4 (Enhanced)
  • Model III - FreHd Patched
  • Model III - FreHd Patched 50Hz
  • Model III - Patched
  • Model III - Patched 50Hz
  • Model III (Official)
  • System 80 Rev 1.4 (Enhanced)

Visit his site here.

January 18, 2026 - TRS80GP Updated to v2.5.6

George and Peter Phillips have updated their awesome TRS80GP emulator to v2.5.6. Changes are:

New Features:

  • Added "feed" and "delay" script commands.
  • Backtrace now annotated with labels when they are available.
  • Directly loaded Model 1 and 3 BASIC programs now convert ^ to [
  • Disk viewer can be used to modify sector data.
  • Gendon character ROM available for model 1 via -charrom :gendon
  • Green Thumb emulation.
  • IMD disk image saves blank tracks as empty records, allows HxC 0x80 modes.
  • Implemented "load" and "run" script commands.
  • Printer menu options for 80 and 132 column fixed-width printing.
  • Supermem (-mem supermem) and X-MEM/80 support for Model 1 (-mem xmem80).

Bug Fixes:

  • 6809 subtract/compare operations no longer modify the half-carry flag.
  • Add delay to FDC Restore to fix Arranger II adding disks.
  • Disk viewer/disk summary works correctly for hard drives using sector ID ranges 1..n
  • Fixed Mac context menu
  • Fixed Mac debug disassembly window for some processors.
  • Improved IM 0 mode for Model I allowing TPM to format a diskette.
  • Memory views no longer wrap around to address 0; it was too confusing.
  • Model 12, etc. back to immediately reacting to bank swap (port A8H).
  • RS-232 transmit interrupt asserted at when RS-232 reset.
  • Use only 4 bits of FreHD commands like the real FreHD.

You can download it at http://48k.ca/trs80gp.html

January 16, 2026 - TRS-80 Trash Talk Live # 45 set for January 16, 2026

The next TRS-80 Trash Talk live show is January 16, 2026 at 6:00PM Pacific Daylight Time / 9:00PM 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.

January 6, 2026 - New Software

Title:Ham Package IPublisher:Instant SoftwareYear:1978Size:2,504,157Pages:12OCRed:Yes*

Title:Electronics IPublisher:Rick Morel - Instant SoftwareYear:1978Size:4,185,191Pages:22OCRed:Yes*

Ian Mavric was kind enough to send over some missig items! Thank you, Ian!

January 3, 2026 - Key Commander

Paul Hopkins was kind enough to send over Key Commander, one of the known missing files!

The manual can be downloaded Here

And the CAS/WAV image can be downloaded Here

Thank you, Paul!

January 1, 2026 - Site Updates

Happy New Year everyone!

To make linking easier, I have added clipboard icons to the Hardware, Software, and Service Manual pages.

The SSL certificate for www.trs-80.org has been purchased and applied, so related security warnings should have stopped.

December 31, 2025 - Older News

Older news can be found here ...