Questiuon about the Panamatik board on woodstock calculators

[Namir]

Hi All,

Does anyone know how to control the keyboard response timing on Woodstock calculators with the Panamatik board. I vagely remember that pressing certain keys (while turning on the calculator, perhaps?) can alter the timing of the keyboard response to prevent double registration upon pressing a key (especially the digit keys).

Namir

[AnnoyedOne]

(09-15-2024 04:11 PM)Namir Wrote:  I vagely remember that pressing certain keys...

I recently downloaded/read the Panamatik manual (PDF) which describes them.

http://www.panamatik.de/ACTManual.pdf

I'd try that. I don't remember reading about that functionality...

A1

PS: The above link is to "July 2023, Rev. 1.18" of the manual. The oldest I found (on archive.org) was "Jan 2017. Rev. 1.10". It looks like the CPU speed can still be switched between fast and slow but the "use the original ROM" one (that could slow execution even more) has been removed. Perhaps one or both could resolve key bounce.

[teenix]

I have 2 key de-bounce settings on the Teenix board, but it is not guaranteed to fix bouncy keys. It depends on what is causing the problem.

For example, if the metal key membrane attached to the keyboard is getting weak or deformed though use over the years, it doesn't always "snap" on or off when the key is used. This may cause multiple key connections that are outside the scope of a debounce delay. If this delay is increased too much, then you start to lose key responsiveness.

Sometimes a good clean can help.

The Classics had a key de-bounce delay as part of the operating code, but the later models omitted this.

cheers

Tony

[Geoff Quickfall]

Unless Bernhard has updated his software, I have not seen a debounce setting on the panamatik boards.

There is however, arepeat function on some of the keys like BST and SST when you hold them down. That is thanks to the RTC built into his boards for the clock function.

[Ren]

Off Topic,
Is there room inside the Woodstock to put a socket under the Panamatik ACT?
Not that I'd ever ruin the original ACT chip. B^)

[John Garza (3665)]

(09-19-2024 08:11 PM)Ren Wrote:  Off Topic,
Is there room inside the Woodstock to put a socket under the Panamatik ACT?
Not that I'd ever ruin the original ACT chip. B^)

Yes, a low-profile socket

-J

[AnnoyedOne]

(09-19-2024 08:11 PM)Ren Wrote:  Is there room inside the Woodstock to put a socket under the Panamatik ACT?

I believe that the Panamatik repair kit comes with low-profile (SIP?) socket. See the photo's on the site.

With skill/equipment one could probably desolder a working ACT chip from a Woodstock calculator and put a low-profile socket in its place. That would provide the option of an original HP ACT or a Panamatik replacement being used.

Personally I prefer original parts but some like the additional functionality of the Panamatik ACT or Teenix PCB. Of course if you've accidentally blown up your HP ACT chip you may not have much choice.

A1