Search found 46 matches

by Dave Britten
Thu Nov 08, 2018 1:33 pm
Forum: Hardware issues
Topic: Keyboard debouncing
Replies: 50
Views: 3740

Re: Keyboard debouncing

I bought one that is on the way and now I'm really worried about this "bug" :shock: Waiting for news... :| I wouldn't lose too much sleep over it. It's a very minor thing, and I think it was more common with some of the early production models like mine. I've cleaned the keys out, and it's pretty r...
by Dave Britten
Mon Nov 05, 2018 4:39 pm
Forum: Hardware issues
Topic: Keyboard debouncing
Replies: 50
Views: 3740

Re: Keyboard debouncing

My big fear is that I'm going to hit Shift-Clear, CLP or CLV, and get a bounce on that function key, nuking something I didn't want to delete. Hasn't happened so far... Golden rule of layouting: avoid such possibilities! Agreed, but the multi-purpose soft menu keys limit that somewhat. The 17BII, 1...
by Dave Britten
Mon Nov 05, 2018 2:23 pm
Forum: Hardware issues
Topic: Keyboard debouncing
Replies: 50
Views: 3740

Re: Keyboard debouncing

My big fear is that I'm going to hit Shift-Clear, CLP or CLV, and get a bounce on that function key, nuking something I didn't want to delete. Hasn't happened so far...
by Dave Britten
Mon Oct 22, 2018 5:24 pm
Forum: Usage tips, tricks and problem reports
Topic: Machine reset after drop
Replies: 7
Views: 237

Re: Machine reset after drop

Which makes me wonder if I could solder a small 3V cap across the two battery lines to smooth out such brief losses of power. You could do that Dave. Or you could just, you know, not drop your calculator :D That would be my Plan A. But I find it never hurts to have a good Plan B. ;) Could also be u...
by Dave Britten
Mon Oct 22, 2018 3:12 pm
Forum: Usage tips, tricks and problem reports
Topic: Machine reset after drop
Replies: 7
Views: 237

Re: Machine reset after drop

However the sudden G-forces caused the device to reset... I can only imagine "the sudden G-forces" causing an interrupt in voltage supply due to a short loss of contact - which in turn caused a reset. Beyond this, the effect of gravity on electrons should be negligible. Edited to correct an error i...
by Dave Britten
Mon Oct 22, 2018 12:07 pm
Forum: Usage tips, tricks and problem reports
Topic: 8 Level Stack?
Replies: 12
Views: 679

Re: 8 Level Stack?

Hmmh, let's see: This would be an excellent feature for a potential Free42+ fork. Expand the flags to 3-digits for toggling advanced features, ... What for do you need more than 100 flags? Please specify. In the context of Free42, they would just be used for adding additional toggles for for enabli...
by Dave Britten
Mon Oct 22, 2018 12:04 pm
Forum: Usage tips, tricks and problem reports
Topic: Machine reset after drop
Replies: 7
Views: 237

Machine reset after drop

And by "drop", I mean a physical drop, face down on the pavement (because I'm a bonehead). It was still in the case, so it appears to be perfectly fine. However the sudden G-forces caused the device to reset, thus loading the most recent state saved in flash, which was about 2 days old. The date and...
by Dave Britten
Mon Oct 08, 2018 12:24 pm
Forum: Software Library
Topic: Finance - Amortization Program
Replies: 3
Views: 273

Re: Finance - Amortization Program

You're welcome to try out this work-in-progress version I've been working on: http://dave.brittens.org/HP42S/TVM.raw XEQ "TVM" to start. I don't have full documentation written, but I tried to make the functionality and interface as close to the TVM and amort features of the 27S as can reasonably be...
by Dave Britten
Tue Oct 02, 2018 12:19 pm
Forum: Usage tips, tricks and problem reports
Topic: 8 Level Stack?
Replies: 12
Views: 679

Re: 8 Level Stack?

This would be an excellent feature for a potential Free42+ fork. Expand the flags to 3-digits for toggling advanced features, then add an 8-level stack, secondary alpha register that can be swapped in and out by toggling a flag, PUSH/POP instructions to save/restore the whole stack, alpha, and flags...
by Dave Britten
Mon Sep 24, 2018 3:44 pm
Forum: Usage tips, tricks and problem reports
Topic: function %CH
Replies: 7
Views: 368

Re: function %CH

When I try your examples, I get -10 for the first one, and 11.111 for the second one. Do you have a LBL named "%CH" that is causing a conflict? Try doing GTO "%CH". You should see "Label Not Found". If you do have a LBL "%CH", then I would recommend changing its name to avoid conflicts with the Cust...