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HP Forum Archive 19

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HP-71B Math RAM Article
Message #1 Posted by Marcus von Cube, Germany on 16 Feb 2009, 8:09 a.m.

I've added an article to the articles section of this forum. I've managed to download the HP-71B Math Pac to a RAM port in my physical HP-71B.

Link to articles section.

Edited: 17 Feb 2009, 3:43 a.m.

      
Re: HP-71B Math RAM Article
Message #2 Posted by Roland Storz on 17 Feb 2009, 12:08 p.m.,
in response to message #1 by Marcus von Cube, Germany

...genial, pretty easy to perform, how long did it take you to find out?

            
Re: HP-71B Math RAM Article
Message #3 Posted by Marcus von Cube, Germany on 17 Feb 2009, 12:30 p.m.,
in response to message #2 by Roland Storz

I had the idea when I first saw that the ROM appears as a file in a CAT ALL listing. How to reset the protection bits is detailed in the internal design specification, vol. I.


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