HP 50g Delayed Keystroke


Hello - Despite the fact that the HP 50g is one of the best educational investments i have ever made, there is one problem that annoys me.

It seems that the action of a keystroke is occasionally delayed until another key is pressed. Id say this happens once for every 50 keystrokes.

Let me exemplify the problem. Say i open a choose menu and push the down arrow to choice X. And then lets just say that one time i pressed the downkey nothing happens UNTIL I PRESS ANY OTHER KEY. Say I press the down arrow again. This results in moving the selection TWO choices down. Or say I press the press the OK F-button after the freeze. This results in moving the selection down ONCE, than applying the choice. Weird!

One may claim my keytime is set too high. I put it very low (500) and still this happens. Note that the problem of missed entries due to rapid keypresses is distinct from the problem I am having.

I also upgraded the ROM. No cigar.

Can someone please let me know if I am not the only person having this problem? Thankyou


It is the wonderful "Busy Bug" as it has been dubbed. It has to do with the interaction between the ARM and the emulated saturn when there is speed switching going on.

Unfortunately it looks like it probably won't be fixed any time soon.



Interesting. Is this bug exclusively 50g or has this happened for a while now?


It happened in the 49G+ for a while, and then dissapeared, and then came back later. From what I heard, nobody could every figure out where or why. The other ARM based calculators, like the 39GS and 40GS don't have this issue.


Possibly Related Threads...
Thread Author Replies Views Last Post
  Most usable keystroke calculator? Sid Cave 32 5,458 01-07-2012, 03:49 PM
Last Post: Lutz Jacob
  HP 50g trilogy. The new HP 50g Blue (and II) Pablo P (Spain) 18 3,752 09-19-2011, 03:08 AM
Last Post: BruceH
  Ren, you asked for keystroke calculations designnut 0 552 03-07-2009, 12:24 PM
Last Post: designnut
  HP 35s ENTER and keystroke skipping Luis Moreno 12 1,452 11-01-2008, 03:40 PM
Last Post: Brian Healy
  Keystroke Intensive Casio Hal Bitton in Boise 2 806 03-25-2008, 04:14 AM
Last Post: DaveJ
  Keystroke programming worksheet Martin Pinckney 5 1,249 11-15-2007, 12:24 AM
Last Post: Forrest Switzer
  Keystroke Programming and Stacks DaveJ 14 2,570 09-10-2007, 02:57 PM
Last Post: Namir
  Keystroke recording on 50G (quite long...) Giancarlo (Italy) 0 490 02-27-2007, 09:53 AM
Last Post: Giancarlo (Italy)
  HP-33s keystroke encoding and checksums [long] Ivan Nejgebauer 12 2,276 06-19-2006, 10:00 AM
Last Post: Eric Smith
  Ease/Dis-ease of Keystroke Programming Howard Owen 14 2,469 12-31-2005, 12:09 AM
Last Post: Howard Owen

Forum Jump: