HP-67 DSP vs FIX

[John Garza (3665)]

Yep, same here... now I remember. I recall using those special key-presses to generate keycodes to build messages way back then. I had the phase 1 interrupt switch on my 67 installed as a little magnetic reed switch on the inside but near the case surface - so a small magnet passed over it would activate it. I didn't want to drill holes in my 67, and it was a much neater solution that using a separate piece of hardware (the Black Box). Needless to say, I DID NOT carry the magnet around in the case with the 67 and the mag cards. That was... I think... 44 or so years ago.

-J