Post Reply 
HP-41 - Memory modules
04-08-2019, 07:59 AM
Post: #2
RE: HP-41
On a 41C you have to use EMDIR to get a listing of the files in extended memory and the number of registers of X-Mem free is returned to X.

You also need the X-Func module on a 41C or CV to be able to use an X-Mem module. The CX has the X-Func module baked into its ROM so you don't need that module.

The X-Func module provides 126 registers of X-Mem of which 124 are usable. Each X-Mem module provides a further 240 registers of which 238 are usable. So, after running EMDIR, X should be left with 124, 362 or 600 depending on the number of X-Mem modules installed.

If you plug two X-Mem modules into the 41C, make sure they are not one underneath the other. Either have them both in the same row or organized diagonally.
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
HP-41 - Memory modules - albertofenini - 04-08-2019, 07:26 AM
RE: HP-41 - grsbanks - 04-08-2019 07:59 AM
RE: HP-41 - Jurgen Keller - 04-08-2019, 06:42 PM
RE: HP-41 - grsbanks - 04-09-2019, 07:39 AM
RE: HP-41 - albertofenini - 04-09-2019, 11:19 PM
RE: HP-41 - rprosperi - 04-10-2019, 02:25 AM
RE: HP-41 - grsbanks - 04-10-2019, 05:11 AM
RE: HP-41 - albertofenini - 04-10-2019, 11:19 AM
RE: HP-41 - Memory modules - Sylvain Cote - 04-21-2019, 01:52 PM
RE: HP-41 - Memory modules - rprosperi - 04-21-2019, 03:31 PM
RE: HP-41 - Memory modules - Sylvain Cote - 04-21-2019, 03:48 PM
RE: HP-41 - Memory modules - rprosperi - 04-21-2019, 04:17 PM
RE: HP-41 - Massimo Gnerucci - 04-10-2019, 11:29 AM
RE: HP-41 - rprosperi - 04-10-2019, 12:44 PM
RE: HP-41 - Memory modules - Dave Britten - 04-10-2019, 04:01 PM
RE: HP-41 - Memory modules - Dave Britten - 04-10-2019, 07:05 PM
RE: HP-41 - Memory modules - Dave Britten - 04-10-2019, 08:18 PM
RE: HP-41 - grsbanks - 04-10-2019, 11:35 AM
RE: HP-41 - albertofenini - 04-10-2019, 11:42 AM



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