Facts:

• Is a native Windows application (features such as sound and joystick support will work on all hardware, and you can run the emulator concurrently with other Windows applications without any adverse effects)
• Emulates the Model I (Levels I and II), Model III (Levels I and II), Model 4, and Model 4P with a variety of hardware add-ons, including doublers, graphics boards, joysticks, and additional memory
• Provides complete and “cycle accurate” hardware-level emulation (even protected disks work without problems)
• Includes optional realistic TRS-80 disk drive sound
• Supports all popular virtual disk (.DSK) formats
• Includes support for the rare Level I Model III
• Includes emulation of the Exatron Stringy Floppy
• Includes cut/paste of TRS-80 screen contents
• Supports true Model 4P Mode
• Hovering the mouse cursor over the floppy drive indicator light in the status bar will display the current drive status and position

Unregistered Shareware Version:

• Works under all current versions of Windows
• Full Windows application – no low-level hardware conflicts!
• Model I, Model III, and Model 4 emulation
• Four floppy disk drives (with optional realistic disk drive sound)
• Cassette tape drive with graphical on-screen controls
• Printer support
• Serial port for RS-232 communications
• Joystick support (using a Windows joystick – TRISSTICK and Alpha Products joysticks are emulated)

Registered Version:

• All features included in the shareware version
• High resolution graphics (Radio Shack and MicroLabs)
• Up to 1 megabyte of additional memory in Model 4 mode
• Hard disk support
• Orchestra 85/90 music generation
• Built-in emulation of an Epson FX-80 dot matrix printer (including graphics and control codes)

SDLTRS builds on XTRS and adds Windows and Mac OS X support, Fullscreen display, Text based GUI on Windows and Linux, and in Fullscreen mode on the Macintosh, Configuration files, Disk LED Indicators on screen, Creation of Disk images inside of the program, Saving and loading of disk sets, Saving and loading of emualtor state, Copy and Paste of text to/from host and emulator, and USB Joystick support.

Emulator Features:

• Windows and Mac OS X support.
• Fullscreen display
• Text based GUI on Windows and Linux, and in Fullscreen mode on the Macintosh.
• Configuration files.
• Disk LED Indicators on screen.
• Creation of Disk images inside of the program.
• Saving and loading of disk sets.
• Saving and loading of emualtor state.
• Copy and Paste of text to/from host and emulator.
• USB Joystick support.
• Graphical interface, include Media management with graphical representation of the disk drives and cassette [MAC Only]
• Printer emulation of Epson FX-80 and CGP-115 Plotter/Printer, with output to PDF files. [MAC Only]
• Debugger in separate program window. [MAC Only]
• TRS-80 Model I, III, and 4/4p emulation.
• Emulated cassette drive.
• Emulated 5″ and 8″ floppy disk drives.
• Emulated Hard Drives.
• Data Import and Export from Host.
• Sound emulation.
• Mouse emulation.
• Joystick emulation.
• Printer emulation.
• Debugger.

Built primarily as a development tool for software written for real TRS-80’s and for experiments in improved emulation fidelity, it can load programs in .cas, .hex, .bas or .cmd format directly from a command line but has no disk emulation nor can use use CLOAD or SYSTEM to load .cas files. No separate ROM is required.

MESS is a source-available project which documents the hardware for a wide variety of (mostly vintage) computers, video game consoles, and calculators through software emulation, as MAME does for arcade games. As a nice side effect to this documentation, MESS allows software and games for these hardware platforms to be run on modern PCs.

Emulates a TRS-80 Model III using only Javascript.

Emulates a Level I TRS-80 Model on the Web (Java).

Features include:

• Emulates a Model III Disk system with 48K ram
• Emulates a floppy disk controller and works with DMK, JV3, and JV1 disks
• Z-80 emulation includes most undocumented instructions and behavior
• Advanced view includes real-time disassembly and step, step over, and step out commands
• Cassette port sound is emulated
• Built-in assembler
• Utility to convert CMD file to floppy DMK file based on TRSDOS 1.3
• Will run over 40Mhz (if throttling turned off) on a modern PC
• Fully object oriented all .net (c#) code
• Requires .NET