Wanted: HP-65 Quick Reference Guide

[rprosperi]

(03-21-2018 10:06 AM)teenix Wrote:  

(03-21-2018 10:02 AM)teenix Wrote:  The HP-65 puts all key press values into a buffer and when switched to W/PGM mode, this value is used to display the key coordinate of the last key pressed. It did not get stored in program memory because the key press was in RUN mode.

I forgot to mention this process is all explained on pages 62 and 63 of the HP-65 owners manual.

cheers

Tony

When I read this thread yesterday I fired up Tony's HP-65 emulator and was surprised to see the '44' in the display, initially thinking there may be a bug. I would go back to RUN mode, GTO 0 and then SST through, and the 44 was gone. WTF??

So I broke down and looked into the manual, and it took a lot of looking (especially when one is inclined to think it's a bug anyhow) and then I finally found this explanation. Though I (probably) knew this in the distant past, I've completely forgotten this behavior, and as it never appeared again in any future machines, it was easy to forget.

Although we tend to think of the 65 as just a slightly simpler 67, it's easy to forget just how far the programming features and behavior advanced between the 65 and the Woodstocks in just a couple years.

No doubt lots of folks are also having refresher courses reading this too. Thanks, Dieter for those questions about the suspicious QRG contents.