20 May
2019
20 May
'19
8:55 a.m.
Only just within the last month I finally obtained a ROM dump from a
production HP-01, for potential use in my Nonpareil simulator. Previously I
only had the preproduction code listed in a US patent. I'm not sure when
I'll have time to actually work on the simulation, though.
My original plan had been to crack open an HP-01 module and try to read the
ROM bits optically, as Peter Monta did for the HP-35. However, that didn't
work, probably due to a passivation coating on the ROM dies.