Although Atari 8-bit computers can differentiate between a large range of Basic errors, these are unfortunately all of the form 'Line 1350 Error 143' which send you scurrying to a manual to find the corresponding text. This program for all Atari machines (including XLs) will generate a full textual error message each time an error occurs.

I've included the assembly listing purely for the interest of readers with a knowledge of machine code. You need only type the first listing to use the program.