DOS33 - an open source Applesoft BASIC interpreter

This is a collection of utilities that will extract apple ][ disk images and run pure Applesoft Basic programs. The tools lex and yacc/bison are used to generate the applesoft basic parser.

A big thanks to Vince Weaver for making his set of Apple utilities available as open source.

Download

The source code of these tools are made available under the terms of the GNU General Public License (GPL).

Quick start

To get started, unpack a disk image with the 'catalog' utility. This will create a directory named as the image, without the .dsk extension, containing the files from the image. Change to this new directory and start the 'asexec' utility. Applesoft basic programs can now be loaded with the LOAD command, and started using the RUN command. Other disk images catalogs in the above directory can be listed with the DISKS command, and changed to with the CD command.

These are the commands available in the 'asexec' utility:

Welcome to asexec, the linux applesoft interpreter

>help
Online help:
 LOAD <program>
 SAVE [<program>]
 RUN [<program>]
 LIST        - list loaded program
 EDIT [<line>]
 NEW         - delete program in memory
 TYPE <file> - read a file
 DUMP <file> - hex dump a file
 CATALOG     - lists files on current disk
 DISKS       - show available disks
 CD <disk>   - change disk
 INFO        - show current disk and loaded program
 HELP
 QUIT


>

Source code Documentation

Class diagram