In Search of 15C+ ROM image

[Didier Lachieze]

(07-15-2022 11:58 AM)Stevetuc Wrote:  That's great news and you beat me to it!
Can you give details of the method you used to flash?

The method described in this video which is the same method as the one used for the WP 34S.

(07-15-2022 11:58 AM)Stevetuc Wrote:  I assume you applied the patch bytes directly to the posted final beta rom using a hex editor.

Yes.

(07-15-2022 11:58 AM)Stevetuc Wrote:  Did you follow the method described here:
https://lithcore.cn/hp12c-modding-assets/
An original (for patched) rom binary file into address 4800-77FF leaving the nut emulator in situ using Mysamba?

No, my understanding is that this method is used to patch the full ROM binary into the latest 12C+ (Rev 2) leaving in place the 12C Nut emulator using a JTag interface, and it is not applicable to the 15C LE nor the original 12C+.

(07-15-2022 12:04 PM)dmh Wrote:  Does it work on any LE firmware version or only the release version?

Ie can it be applied to the version that doesn’t have the PSE bug?

Yes it works on any LE firmware, I tested it on both the release version and the beta version without the PSE bug.