Recreating a HP-25

[Guenter Schink]

(06-09-2016 07:33 AM)Alejandro Paz(Germany) Wrote:  Hello,

I wanted to tell about one of the projects I'm working on: recreating a HP-25. Of course there is a couple of emulators, but having the calc on one's hand is something else, I think.
I decided, because I like FPGAs, to use a small MachXO2 device to recreate the chipset of the calc.
Being a work in progress means that it doesn't yet exists outside a simulator, but it seems to runs the microcode . I still have to compare the output to a trace of the java emulator.
If anyone wants to peek into the HDL, I posted it here: HDL and Testbench

The testbench works with icarus verilog and should still work with Aldec's Active HDL simulator (installed with Lattice Diamond).

A circuit is in the works , I have to relearn KiCad again

You should consider to join the Alschwill (next to Basel,CH) meeting in October. You'd certainly have an interested audience.

Günter