HP-35 and HP-45 ROMs

[brouhaha]

(04-25-2023 05:24 PM)Z80Sarah Wrote:  Definitely both versions of the 45 went into production. At one time I had a copy of the early version, but I don't seem to have it now. My vague recollection was that there were two instructions interchanged.

There are two main released versions of the 35 microcode, although apparently a very few 35s escaped APD with even earlier microcode with even more bugs. Peter Monta calls the two versions "v2" and "v4", based on what units they were dumped from, although the microcode version doesn't directly correlate with the "version 2" and "version 4" terminology scome collectors use to distinguish units with or without the red dot, raised dot on 5 key, "35" on label,, and positioning of key legends.

I've attached a ZIP file with the two available versions of the 35 firmware and one of the 45. The older 35 firmware is labelled 35-old. I htink the 45 firmware is actually the newer version. The files contain the data in octal, one word per line, in the format aaaa:dddd, where aaaa is the address and dddd is the data.