RadioShack TRS-80 Model 100/102 Resource Page

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I would like to make this material available to all those who own a model 100/102 and found out how hard it is to find books and datasheets about it.

Links

• Club 100
• TRS80-100
• Lots of good stuff about the TRS-80 100/102
• Radio Shack (Tandy) TRS-80 Model 100
• Cross-Reference on CPU

8085

• 8085A Intel Datasheet in HTML [Still under construction]
• 8085A Instruction Set Summary (Intel datasheet 393Kb .Gif)
• 8085 Specs in HTML
• 8085 Timings (258Kb .Gif)
• 8085 I/O Mem Timings (88Kb .Gif)
• WinSim85 Home Page
• A real-world 8085 project

RS232 The Mystery - All about Null-Modem Cables and the least of all standards

TRS-80 Files and Programs

• 8085 Op-codes in Zilog Z80 mnemonics
• Program (Asm8085.ba) to generate above list or Monitor Programs in memory

Connectors

• All The Cables and Connectors you could possibly imagine!
• RS232-C interface
• Parallel interface
• Modem interface
• Cassette interface
• M100 40Pin External bus interface
• M102 40Pin External bus interface
• Bar Code reader
• Make Your Own Parallel Centronics Interface Cable

Schematic Diagrams - thanks to Klaus Dichmann

• M100 Main PCB
  • (300dpi B/W .gif) 353Kb
  • (300dpi Grey .gif) 897Kb
• M102 Main PCB
  • (300dpi B/W .gif) 330Kb
  • (300dpi Grey .gif) 1265Kb
• LCD PCB (M100 and M102 are almost identical except for buzzer and power LED)
  • M100 (300dpi B/W .gif) 291Kb
  • M100 (300dpi grey .gif) 729Kb
  • M102 Connector differences 71Kb

Custom Designed Interfaces

• How do I drive large loads with the "T"
• 8 Channels Asynchronous ADC
• Home Built 24K Memory Upgrade for 8K Model-100
• From 24K to 32K on the M102 the easy way
• LM2907 Frequency to Voltage converter chip (.pdf 310K)
• DC Motor Interface through cassette port
• Automatic Response Interface

Tables

• IO/Mem addressing [PRELIMINARY]
• Home Improvements [PRELIMINARY]