Multi Calculator Kit

[Harald]

(03-02-2018 07:42 AM)teenix Wrote:  Hi all,

I have managed to include the microcode for the HP-97 calculator into the MultiCalc and makes the kit able to emulate 26 models now. Harald's controller can also use this model. Not bad for a $3.00 chip.

This took quite a lot of code modifications to accomplish and I must say, a touch of ingenuity to squeeze it in. The printer functions will work through the USB interface to the PC emulator like the other printer models do. The HP-97 and the HP-67 can both use each others programs as the card storage format is the same.

The keyboard for the HP-97 is way different than the other models, so I modelled the key interface so that it resembles the HP-67. The key functions are nearly the same anyway. Of course, the program display will show the original key codes and will not match the MultiCalc keyboard, but there is a new HP97 key overlay for the MultiCalc and Haralds Classic controller.

There are 3 switches for the 97. The multiCalc top switch is for ON/OFF and PRGM/RUN modes and works similar to the HP-19C. The other switch is for the 3 printer modes.

Due to the PIC code modifications, a full chip reprogram is required, so the update procedure will require 2 passes. The PC programmer interface window will list the simple instructions that are required.

I think that will be about it for this PIC chip. There is still 4K bytes of ROM space available but not enough to add more models so that will be saved for modifications.

cheers

Tony

Wow! Now I know why you have gone quiet for some time. You have been busy doing all this.
Bernhard, Nate and Meindert, I was just about to pack your boards, bit I will update to the new version before doing so.

Cheers,
Harald