|ganley.org -> Software by Joe Ganley -> TRS-80 Emulator Applet|
TRS-80 Model 1 BASIC Interpreter
by Joe Ganley
The applet above is an interpreter for TRS-80 Model 1 Level 2 BASIC.
Note that it is a BASIC interpreter, not a TRS-80 emulator; thus, the
hardware-specific commands (
The interpreter is incomplete; I started writing it to learn Java,
but I soon reached a point where further development would not have
taught me anything further about Java, and more pressing tasks called.
Aside from the hardware-specific commands,
the following commands and functions are not yet implemented:
the error codes within error handling (
In addition, the worst bug is that
the screen does not update while a program is running, due to the way
The choice to write a BASIC interpreter rather than a Z-80 emulator was made for a number of reasons. For example, it is unclear (to me, anyway) whether the current copyright situation on the TRS-80 BASIC ROM, which would be necessary in order to faithfully emulate the machine, will allow it to be distributed over the web. However, the bottom line is that I was more interested in writing a BASIC interpreter than a Z-80 emulator. Probably an emulator would be more useful (if either can really be called "useful"), but anyway...
Source code: trs80.tar.
Warning: This was the first major program I wrote in Java, so in many places the code isn't pretty.
"TRS-80" is a trademark of the Tandy Corporation.