6502 Tiny BASIC

This is Bob Applegate's (bob@corshamtech.com) spin of a Tiny BASIC interpreter for the 6502. It uses an IL approach, like proposed by Dr Dobb's Journal in the first few issues. This is not fancy, it's not bug free, and it's not amazing by any means, but it was fun to write and decent enough to do fun stuff and run demos.

Features

Pure 6502 code.
Small, as per Tiny. Intepreter and user code fits in 0200-13FF.
Can support Corsham Technologies SD Card System to save/load files.
16 bit integer math.
Built using IL, so you can change the languge by changing just the IL.

Keywords

LET
GOTO
GOSUB
PRINT
IF
INPUT
RETURN
END
LIST
RUN
NEW
EXIT
REM

And if the SD functions are enabled:

SAVE
LOAD

Functions:

FREE()
RND(x)
ABS(x)

Requirements

RAM from 0200 to 13FF.
Must have xKIM for the SD related commands to work.

Nota Bene

I've been slowly doing bug fixes but there are probably plenty more. Since it is tiny, there is minimal error checking and little tolerance for odd errors.

Send bug reports to bob@corshamtech.com.

License