### Overview

By default trs80gp comes up in Model 3 mode with a full 48K of memory and all supported hardware attached. Command line arguments are used to select different models, hardware configurations and startup options. Run "trs80gp -?" or use the "Help → Command Line Options..." menu to get the latest information on them.

Programs can be run directly on the command line. Doing so loads them much faster than reading from virtual cassette files and without the hassle of writing them to a virtual disk image. Files in "DOS" format (.cmd) are run at the TRS-DOS prompt. Other machine language files and BASIC programs are run at the ROM BASIC `READY` prompt or at machine boot for Model 2 and 4P which don't have a ROM BASIC.

It may not be obvious that this direct running of programs is not the way the TRS-80 normally loads and executes programs. Some programs may not work especially disk BASIC programs. However it is very useful for program development and is otherwise extremely handy when it does work.

To give it a try, download the emulator and also my bouncing ball demo program. You can run it directly from the .zip archive:

          trs80gp ball.zip

Which will prompt for which file to use. Or specify the file inside the .zip archive directly like so:

          trs80gp ball.zip?ball.cas

Or you can extract the virtual cassette file yourself and run it:

          trs80gp ball.cas

You can load machine language programs in `.cmd`, `.hex` and `.bds` formats. My Z-80 cross assembler zmac produces all three formats and with `.bds` you get full source-level debugging and memory fault detection (see Debug → Z-80 Debugger... and Debug → Source Code...).

It also can load BASIC programs in tokenized form or plain ASCII.

There's so much more! But I'll leave it at that and spend the rest of this page more in "reference manual" mode.

- Command Line Options
- Model Selection
- The Keyboard
- Light Pen and Joystick
- Floppy Disks
- Hard Drives
- Cassette Tapes
- Aculab Floppy Tapes
- Sound
- Memory
- Endpoints
- Printer
- Serial (RS-232) Ports
- Recording movies, pictures and audio.
- Turbo Mode
- Display
- File Import and Export
- Scripting
- Events
- Programming
- FreHD Emulation
- DT-1 Terminal
- Green Thumb
- TRS-80 Videotex
- Electric Crayon
- Color Computer
- Tandy 10
- Linux Notes
- MacOS Notes