Post Reply 
M Registers on early HP Calculators
04-25-2017, 01:58 AM
Post: #3
RE: M Registers on early HP Calculators

The M, M1 and M2 registers can be used as storage or as general purpose scratch pad registers to help the microcode out if it needs to temporarily store some data. The HP45 for example uses the M register to store the FIX SCI values when set by the user. In the HP97 this data is stored in RAM memory register $3E. The HP67 uses M1 quite a lot while executing various functions.

Not familiar with Voyagers.



Thanks, Tony. I'll also be interested to see if any of the others have something to add.


Find all posts by this user
Quote this message in a reply
Post Reply 

Messages In This Thread
RE: M Registers on early HP Calculators - bshoring - 04-25-2017 01:58 AM

User(s) browsing this thread: 1 Guest(s)