Post Reply 
[HP41CX] V41 memory screwed up; HowTo recover?
04-18-2023, 07:42 PM
Post: #1
[HP41CX] V41 memory screwed up; HowTo recover?
Hello,
I started V41 and see weird thing with CATALOG 1 and no programs can be uploaded (raw files).
Is there a possibility to reset it? ("Reset Calculator" in "Options" did not made it).
I suppose the HP41-CX.lod file is screwed up but cannot find another one on my PC.

HP71 4TH/ASM & Multimod, HP41CV/X & Nov64d, PILBOX, HP-IL 821.62A & 64A & 66A, Deb11 64b-PC & PI2 3 4 w/ ILPER, VIDEO80, V41 & EMU71, DM41X, HP75D
Find all posts by this user
Quote this message in a reply
04-18-2023, 07:47 PM
Post: #2
RE: [HP41CX] V41 memory screwed up; HowTo recover?
(04-18-2023 07:42 PM)floppy Wrote:  Hello,
I started V41 and see weird thing with CATALOG 1 and no programs can be uploaded (raw files).
Is there a possibility to reset it? ("Reset Calculator" in "Options" did not made it).
I suppose the HP41-CX.lod file is screwed up but cannot find another one on my PC.

If you edit the .lod file you can force a "Memory Lost"

Go to the line that starts with "RAM 00D"

The third and fourth bytes will be "01 69" which is the cold start constant

Change them to something else (I use "00 00")

Save the .lod file

start V41 and it will show "MEMORY LOST"
Visit this user's website Find all posts by this user
Quote this message in a reply
04-18-2023, 07:56 PM (This post was last modified: 04-18-2023 07:57 PM by floppy.)
Post: #3
RE: [HP41CX] V41 memory screwed up; HowTo recover?
You are the boss.
THANKS.
(= works & tested ;-)

HP71 4TH/ASM & Multimod, HP41CV/X & Nov64d, PILBOX, HP-IL 821.62A & 64A & 66A, Deb11 64b-PC & PI2 3 4 w/ ILPER, VIDEO80, V41 & EMU71, DM41X, HP75D
Find all posts by this user
Quote this message in a reply
Post Reply 




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