Model T DocGarden

These pages are devoted to the Model T:

TRS-80 Model 100, Tandy Model 102, KC-85, NEC 8201A, NEC 8300, Olivetti M10, Tandy Model 200, and the WP-2

IMPORTANT ANNOUNCEMENT

Due to failure of the old list and inability to contact Merch, The Official Club100 Mailing List is now being hosted here!

Go to the User Page and subscribe to the list.

To send email to the list, just send it to m100@lists.bitchin100.com

Community

The community gathers at Club100.org

Classic Article Repubs

We hope to republish one or more articles from the Golden Era of the Model T every month:

• ROM Addresses: Getting BASIC to do What You Want
• Format Your Words With This TEXT Aid
• TextStar
• A Simple Self-Charger for the Model 100

One-Liners

This is a collection of Microsoft BASIC programs that

• Do something interesting or useful
• With only a single line of code

One-liners are bite-sized computer programs on a human scale. You are encouraged to type them in manually (by hand) and study their operation.

Model 100/102 Compatible One-Liners

Documentation

TPDD Service Manual

File-Transfer and Storage

We still use Model Ts today, so file transfer to/from desktop and modern laptops is an important issue. There are multiple alternatives, from simple text file transfers using TEXT, TELCOM, or BASIC, up to dedicated file transfer protocol client and servers.

Model T File Transfer

Model T Developer Reference

Articles on Model T programming topics

• Gluing Strings in Place
• ROM Hooks
• Running BASIC Code from OptROM
• 8085 Reference
• Low Level Filesystem Access
• CO File Format
• BCR Port Access
• Relocating Loader (RLC) Format
• Error Codes
• Doing Binary In BASIC
• IO map
• Model 100 Serial Interface
• TPDD-2 Sector Access Protocol
• Model T System bus
• TPDD Base Protocol
• TPDD-2 Driver Reverse Engineering
• TPDD Design Notes
• Model 100/102 RAM Pointers
• 8085 RIM Instruction
• Model 100 Port B
• Model 100 RAM Variables
• Tandy 200 RAM
• Tandy 200 Timer
• Model 200 serial interface
• Model 100 System Map Part 0
• Disassembly of RAM and ROM versions of TS-DOS
• Model 100 System Map Part 1 (0000-0CD9)
• Model 100 System Map Part 2 (0DAB-290F)
• Model 100 System Map Part 3 (2943-3D7F)
• Model 100 System Map Part 4 (3FA0-5122)
• Model 100 System Map Part 5 (5146-6CE0)
• Model 100 System Map Part 6 (6D3F-7FD6)
• Model 100 System Map Part 7 (F5F4-FFEC)
• Model T Cross Map 0000-2000
• Model T Cross Map 6000-8000
• Model T Cross Map RAM Variables
• Model T Cross Map 2000-4000
• Model T Cross Map 4000-6000
• Model T Cross Map
• RAM File Handling
• Calling the Main ROM from Option ROM
• BASIC Efficiency Tips
• Model 100 ROM
• RBASIC
• RBASIC on Linux
• OPTROM Switching
• REX Overview
• Extraordinary String Animals
• Covington ROM Maps
• Description of Machine Code File Handling Routines
• Desklink/TS-DOS Directory Access
• Loading a typical CO file
• CRC-16-CCITT
• Model 100 LCD Programming
• BASIC Variable Format

Model 100 and Tandy 102 Variants and Main ROMs

Model and ROM information

Model T Software

• VirtualT
• MTCPM
• RAM4TH
• TBACK
• M100 CP/M

Model T Video

• VT100
• MVT100 Desktop Application
• BCR TTL SERIAL HACK

VT100 is a solution for VGA 80x24 display, which utilizes a variant of Microsoft Disk BASIC (aka DVI) software for tight integration with M100 OS.

MVT100 Desktop Application is an application that runs on a desktop, to provide 80x24 video for M100 using serial data, like MVT100.

BCR TTL SERIAL HACK enables high speed serial TTL character transmission from the BCR port. This is useful for using an external serial CRT like the VT100.

Model T Hardware Hacks and Troubleshooting

• Splitting the Model 100/102/200 case
• Recovering an Unresponsive Laptop
• International Keyboard Support
• Repairing Problem Keys

Model T Hardware Projects

• T200 Disassembly
• NADSBox
• Mikrokolor
• MTHD
• Remem
• REX
• REXclassic
• REXCPM
• NSC800 Conversion
• BCR TTL SERIAL HACK
• PC-8201 BANK2 32kB SRAM card
• M100 26-3801 24kB SRAM card
• 5MHz Upgrade hacks
• T200 2x24kB SRAM card
• 8kB SRAM module
• REXsharp
• 5MHZ upgrade for Model T

REX# is a flash OptROM emulator/switcher

REXCPM combines REX# functionality, with SRAM to enable CP/M. See M100 CP/M

NSC800 Conversion Fun with conversion of an M100 to the NSC800 processor (Z80 compatible).

5MHz Upgrade hacks Information on how to turbo charge your Model T!

ReMem is the ultimate Model T memory upgrade (not active)

REX is a flash OptROM emulator/switcher (not active)

NADSBox is a stand-alone TPDD emulation device that uses SD cards

Mikrokolor Is a Color Graphics interface for the Model 100. Allows for 40x80 character graphics/text

MTHD Is a how to add a Harddrive to your Model T

Joystick adapter is a simple Atari/Commodore joystick interface for Model T

BlueM is a custom bluetooth adapter for the Model T family - look here for Wifi adaptation tips! (not active)

QUAD is a 4x32KB RAM expansion for the M100 - works stand alone or with REX! (not active)

M100ROM, by Mike Stein, is an adapter board for Model 100 that can be used to upgrade the Main ROM, and add an internal Option ROM

Other Topics

OPTROM Switching discussion on code used to bank switch main ROM and option ROM

Olivetti M10 ROM patch a modified M100 Main ROM to replace the Standard USA Olivetti M10 ROM

  Benefits:
  * allows use of M100 software on M10 hardware
  * supports M100 Option ROMs

M100/T102 Hardware scrolling patch a modification to the main ROM to support hardware scrolling.

  Benefits:
  * faster screen response
  Drawbacks:
  * screen does not scroll as smoothly

Model T Links

Rick Hanson's Club 100

Gary Weber's NEC PC-8201 Site

Chris Osburn's Calculating Instruments

Ken Pettit's Model T Projects