HP97 The journey begins

[teenix]

Hi all,

A little more progress. I have an external power switch as the real one is not assembled yet.

The right-hand switch is working according to the calculator selected.

The display is working, although for this particular one, the right most digit appears to be dead. The data getting to it is correct so there must be a dud connection on the common cathode. This might be repairable if the lens assembly can be removed and replaced without destroying anything.

I ran my virtual keyboard from the PC and all seems to be working, although I got 90.0000 for ASIN 88.0000, which is wrong. I found a simple code bug and is now fixed.

I attached the real keyboard and ran some test code and the data that I was expecting is appearing ok. I'll hook it up the through the ACT soon and it should(?) start working as a Spice.

Some fiddling with the circuit boards was required as the whole assembly must be a certain thickness to fit properly into the Spice casing. Both the side clips line up ok and are holding everything together as they should. I am now hoping the display fits where it should and doesn't interfere with the battery charge board. It is sitting in a test jig at the moment and normally will sit closer to the top of the board.

There is quite a bit of code to test yet and will take some time. I also added an extra feature that the other CPU models don't have, so that has to be tested as well.

cheers

Tony