The other day I posted about Teenix- an Australian company that provides a comprehensive solution for repairing HP "Classic" calculators.
Today I'd like to talk about Panamatik - a German company that does the same, and more, on the Woodstock family of HP calculators. They provide a circuit that emulates all hp2x units - including the powerful hp25, even solving the typical screen cathode issue (which, as far as I know, is not tackled by the Teenix circuit)
What's more, there are additional features on tap, and some interesting additions, like GPS localization. Just imagine: GPS localization on a hp25 calculator!
There is a module for repair the act chip that is also in other classic units - including the hp67 family. This was not covered, as far as I know, by the Teenix solution.
In addition to all this, there are also fantastic emulators for many HP calculators, and also a detailed "debugger" for said units, that allows you to see all the registers and states of the processor.
I'll return to Panamatik when I have installed a module and report on that.
Here USC a link to the Panamatik website: