HP 41c STAT 1 module version 1A

[dmh]

Just wondering what serial number / year your STAT ROMs are? Is my 1A 19 serial number the earliest STAT ROM? When was the STAT ROM released?

(09-13-2021 02:59 PM)rprosperi Wrote:  I checked my ROMs and also don't have a STAT 1A, sorry.

"*a" and "*b" in the 1B ROM appear to be housekeeping routines (setting flags and display format), apparently given global labels as they are called by multiple programs. Insert the 1A ROM and look at the code to see what "*c" does, it may be a hint as to what has changed. Most likely it follows the "*b" code in the same global program at the end of the Catalog.

Have you looked through the code of the various application programs in the 1a ROM to see if "*c" is actually called? It's possible it was included initially but eventually never called, even in the 1A ROM, so then removed when updated to 1B. Since "*a" and "*b" are at the end of the catalog in ROM 1B, dropping "*c" does not affect the XROM ID for the balance of the functions.