HP97 The journey begins

[teenix]

Hi all,

Latest Spice board is constructed.

This one has display drivers on board so will give the processor an easy run instead of it trying to provide the LED drive which is outside the max current for the IO pins.

I haven't turned it on or programmed it yet - almost too scared in case it goes poof :-)

Fingers crossed.

Yesterday I also added another programmable function for the HP-34C model. It works on the emulator, so should do on the board as well. It will generate a random number in the range 0 to 0.9999999999 You can access this by pressing the key combination [g][0] which can also be used in programs. The random result is placed in the X register and pushes the stack up a level. So, if for example, you want a random number between 0 and 9, press [g][0], multiply by 10. and do an INT.

Edit: I forgot to mention a big thanks to Harald for helping to check over the circuit.

cheers

Tony