I seriously doubt these can be read in another
machine. For one thing,
HP stores the program files in a tokenized format and AFIK no one knows
what the token values are.
Reverse Engineering.
Start with storing HelloWorld.BAS yourself, then reading it, etc.
having read the intenrals documentation for the HP75 [1], it may not be
_that_ easy to reverse-engineer. From what I remember, on the 75, some of
BASIC is tranlated into a reverse polish type of code when it's
tokenised. I wouldn't be suprised if other HP machines did odd things
like that and didn't just replace keywords with tokens.
[1] It's over 1000 pages, so no way am I offereing to copy that!
-tony