http://usotsuki.info/eh210p8_v084.zip
The ehbasic.txt describes the differences mostly between EHBASIC+ (the
heavily modified version tailored to the hardware) and the original EHBASIC
(with no hardware-specific extensions). Either version can be built from
the existing source.
There is only one thing I can think of I'd add into the existing code:
autoload. This means that tokens will probably not be moved any further.
Most FPBASIC functionality has been added. What remains will stay out, as I
don't have room in the token table for anything else and don't want the
program to have to put its code below the 32K mark.