Posts: 62
Threads: 24
Joined: Jan 1970
I once had a similar problem that was only solved by turning to another module of the same type. I still think it was a problem with the module itself and I was not able to faind a solution. I still have the "problematic" module because may be I can revive it.
Posts: 4,027
Threads: 172
Joined: Aug 2005
Hi;
check module's contacts. There are two contacts at the I/O assembly that are used to address the inserted modules. If there is a bad contact in any of them, you'll probably have problems (I am not sure if they will be like the ones you mentioned).
The only time I experienced this was when I tried plugging a MM in an HP41CV. You know, I rebuilt the babe believing it was a 41C, and it was a 41CV. After plugging the MM, the machine started a continuous, low-power tone. I removed the batteries and tried other doors. Only one accepted the module, and I am almost sure it was port 1. Without the module, I executed SIZE 000. Surprise: 00 REG 319. It was a 41CV!
This is not your case, I know, but I needed to tell the tale.
Cheers. And have a carefull look at the contacts.
Posts: 58
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Joined: Sep 2006
That is normal. In a 41C the first MM has to be in port 1 the second one in port 2 and so on.
You can not put say, a PPC-Rom in port 1 and a MM in port 2 also MM can not skip ports.
Like:
port 1: MM
port 2: PPC
port 3: MM
This is explained in the directions for the modules.
Christopher
Posts: 136
Threads: 31
Joined: Nov 2005
Thanks a lot for the information, Christopher! I didn't know that the order in which MMs have to be plugged in do obey a strict rule! As for Jose and Viera: Thanks for your input anyway. Guess, we've just learned a new bit about our calculators, don't we? :-)
