Changed HP15C firmware for Go15c?

[johanw]

SwissMicros patched the original HP15C rom image to allow more memory because the improved hardware allowed it. Which made me wonder: is it possible to extract the changed ROM image from the DM15 firmware? I would like to test if this changed firmware would make it possible to use the extra memory also on emulators like Go15, who use a rom file to function.

When I quickly compare both files I could not see where the 15C rom is located in the firmware, a search for the first few rom bytes in the unmodified firmware does show no match (I assume the firmware contains more than just the rom image).

Edit: I seem to have accidentily misposted this, it should go to the Not quite HP Calculators - but related section but I can't move the thread.