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In Search of 15C+ ROM image
02-13-2023, 01:56 AM
Post: #81
RE: In Search of 15C+ ROM image
Thank you J-F for the memory patch and DMH for a great video showing the install.
It worked great!

Is there a patch to the 04-15-11 firmware to make PSE work (rather than go back to the 08-19-09 firmware which Bob indicated has its own bugs)?
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03-12-2024, 12:29 PM (This post was last modified: 03-12-2024 12:32 PM by linq2008.)
Post: #82
RE: In Search of 15C+ ROM image
(07-02-2022 02:16 PM)Katie Wasserman Wrote:  Here's are the most recent 12C binaries that I have:

12C SAM4 version from 2015

12C+ from 2011

After I flash the file “12C+ from 2011”,(My HP 12C
+ is Version 2012,FW: 2012-04-03,ChE:E1E1h), the screen show some garbled code. After reset, it showed “-Pr Error”, and the CHS button was invalid and the switch was disabled. Still display - on the front (Now FW: 2011-12-12,ChE:4903h), That's why? Has anyone tested it? It seems this file is wrong。
   
   
   
   
   
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06-23-2024, 07:06 AM
Post: #83
RE: In Search of 15C+ ROM image
Check this post: https://www.hpmuseum.org/forum/thread-20367.html
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