DM42 and labels

[rprosperi]

(05-26-2020 05:06 PM)Dave Britten Wrote:  Pressing a subroutine key (A-E) when the corresponding label isn't defined in program memory will start execution from step 1 and behave normally. This is frequently taken advantage of in 65 programs that either need to save two steps by not explicitly defining one of the keyboard-activated subroutine labels, or by simply placing RTN as the first step in memory so that unassigned subroutine keys don't cause unintended program execution if pressed by the user.

Thanks for the additional tips and notes Dave. I have not spent enough time with 65!

I love the little tricks you noted in the quoted section above! Great examples of the time-honored PPC mindset of using bugs or abnormal features as ways to get something done that couldn't otherwise be done.