FIRST TIME VISITORS

  • Visit the WELCOME page
  • Subscribe to the RSS Feed

Services

  • Do you have TRS-80 Disks? Send them in for Preservation and Conversion for use in an Emulator
  • Request Real DOS Disks

General

  • Site News
  • Intro to Emulation
  • Interviews
    • Bill Gates
    • Bill Hogue
    • Dan Gookin
    • Don French
    • Dubouis & McNamara
    • J. Weaver Jr.
    • Jack Crenshaw
    • Jim Stutsman
    • Josh Lavinsky
    • Kevin Tschudi
    • Paul Andreasen
    • Steven W. Leininger
    • William Demas
  • Shipping a TRS-80
  • Radio Shack Lore
  • Fun Stuff

Support the Site

Help The Site!

  • Missing Software
  • Missing Magazines
  • Send in Your Disks for Archiving

Searches

  • Site-Wide Search
  • Software Search
  • Magazine Search
  • Catalog Search

Emulation and Virtual Media

Info and Downloads:
  • Emulators
  • Virtual Tape Utilities
  • Virtual Disk Utilities
  • Misc TRS-80 Utilities
How To Convert:
  • Tapes to Virtual
  • Disks to Virtual
  • Stringy Floppy to Virtual

Advanced

Internal Operations
  • ROM/Z-80 Info
    • ROMs Compared
    • Model I Level 1 ROM
    • Model I Level II ROM
    • Model III Level II ROM
    • Model III Level II Compilable Source
    • Model 4 ROM
    • Model 4 XDROM
    • Model 4 XDROM Part D
    • Model 4P Boot ROM
    • Network 4 ROM
    • Orig Source Code
    • Bugs
    • Memory map and address reference
    • Entry Points to routines
    • I/O and Misc ROM routines
    • Math Routines
    • RST vectors and Disk BASIC entry points
    • Reference for Z-80 opcodes and undocumented command
  • RAM Addresses/Routines
  • Ports and I/O Devices
  • Device Control Blocks (DCB's)
  • Keyboard Map
Disassemblies
  • Disassemblies
    • Level I ROM
    • Level II ROM
    • Model III ROM
    • Frank Durda Modified C-ROM
    • Model 4 ROM
    • Model 4P Bootstrap ROM
    • XDROM - Frank Durda's Model 4 ROM C replacement
    • Model 4 XDROM Part D
    • Mod I NEWDOS/80 v2.0
    • Mod III NEWDOS/80 v2.0
    • TRSDOS v1.3
    • TRSDOS v2.3
    • VTOS v4.0.2
    • Network 4 Transporter ROM code analysis
Zaps/Patches/Fixes
  • Zaps and Patches
    • DOS
    • Electric Pencil
    • Other Software
    • ZIPs of Patches
  • Tips and Tricks
    • Hard Drive Tips and Tricks
    • String Packing and USR Routines
    • Level II Tips and Tricks
    • NEWDOS/80 Tips and Tricks
    • Other DOS Tips and Tricks
    • TRS-80 Graphics
    • Tape and File Formats/Structures
    • Bugs and Easter Eggs
    • Misc Tips and Tricks
    • Model III Tips and Tricks
    • Model 4 Tips and Tricks
    • Model 4P Tips and Tricks

Support the Site

TRS-80 Models

  • Timeline
  • Model I
  • Model II
  • Model III
  • Model 4/4P/4D
  • Color (Coco 1-3, MC-10)
  • Laptops (100/200/600)
  • Pocket (PC-1 to PC-8)
  • Clones
  • Printers

Support the Site

Reference

  • DOSPlus
  • MULTIDOS
  • NEWDOS/80
  • TRSDOS
  • VTOS
  • CP/M
  • Level II BASIC Ref

Detailed Products

  • ORCH-80/85/90
  • Speed-Up Boards
  • Scott Adams Adventures

Tandy Publications

  • Customer Service Bulletins
  • Memos / Bulletins / Releases
  • Comp Center Answers
  • Catalogs
  • Comic Books
Microcomputer News
  • USA Edition
  • Australian Edition
  • Other Editions

Publications

  • Books
  • Magazines (Non-Tandy)
    • 80 Microcomputing
    • 80 Notebook
    • 80 U.S. Journal
    • The Alternate Source
    • Baron's Microcomputing
    • C.I.E.
    • CLOAD
    • CodeWorks
    • Computer News 80
    • Computer User
    • Creative Computing
    • H&E Computronics
    • LDOS / LSI
    • Micro-80
    • Misosys Notes
    • Misosys Quarterly
    • Softside
    • The 8ighty
    • Trace
    • TRS8Bit
    • TRSTimes
    • Other Magazines
  • Software Manuals
  • User's Group Newsletters
  • Catalogs (Non-Tandy)
  • Product Flyers
  • Company Newsletters

This Section for TRS-80 Hardware Owners

TRS-80 Upgrades/Parts:
  • Upgrades and Parts
  • Schematics/3-D Printable Parts
TRS-80 Repairs:
  • Main Repair Page
  • Repair People
  • Opening a TRS-80
  • Using an EPROM
Hardware Mods and Hacks:
  • Model I
  • Model III
  • Model 4
Other Items ...
  • Hardware Manuals
  • Service Manuals
  • Using a Computer / Tablet / Smartphone for Cassette I/O

Misc

  • Send Me Email
  • Archived News and Guestbook
  • Personal Stories Submitted
  • Email and other TRS-80 Sites
  • Copyrights

Support the Site