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Recreating a HP-25
06-09-2016, 07:33 AM
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Recreating a HP-25
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 Smile. 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 Smile, I have to relearn KiCad again Smile
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Messages In This Thread
Recreating a HP-25 - Alejandro Paz(Germany) - 06-09-2016 07:33 AM
RE: Recreating a HP-25 - walter b - 06-09-2016, 09:10 AM
RE: Recreating a HP-25 - Thomas Radtke - 06-09-2016, 10:41 AM
RE: Recreating a HP-25 - PANAMATIK - 06-09-2016, 11:37 AM
RE: Recreating a HP-25 - Thomas Radtke - 06-09-2016, 03:38 PM
RE: Recreating a HP-25 - Guenter Schink - 06-09-2016, 07:57 PM
RE: Recreating a HP-25 - Guenter Schink - 06-10-2016, 09:13 PM
RE: Recreating a HP-25 - PANAMATIK - 07-10-2016, 10:26 AM
RE: Recreating a HP-25 - PANAMATIK - 10-26-2016, 09:56 PM



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