HP-27S 50th Anniversary Limited Edition really?

[Gerson W. Barbosa]

(10-23-2021 03:39 PM)Mick_Go Wrote:  For the ROM ID, I found this SPD1080272 in the test mode but I don't know if it's the right thing but compared to the SPD 1046864 from my 17B calculator the structure seems to be the same.

This is just the clock speed in Hz. On the Pioneers you should except measurements slightly above 1 MHz. My 17B II returned 1049504, incidentally the same on my older 42S (but a second self test returned 1047776).