HP-71b ROM version

[KimH]

In my pile I have this

2630A00003 Plastic Back 1BBBB - it even has the new CPU - I was able to overclock it

New CPU was supposed to be from 2623A

(10-05-2020 06:15 PM)rprosperi Wrote:  I can extend some of those ranges a bit:

1BBBB: 2401Axxxxx to 2713Axxxxx (backs w/o screws, or V2, start around 2646Axxxxx)
1CCCC: 2718Axxxxx to 2745Axxxxx
1CDCC: 2810Axxxxx an up

And if anyone else has a machine that further extends and clarifies the date ranges, please post an update (here or elsewhere).

The most interesting week was 2401A, in which there were both 1AAAA and 1BBBB machines produced.