In Search of 15C+ ROM image

[dmh]

Is Olivier's commented (or anyone else's) disassembly of the 15C ROM available anywhere?

Alternatively, what's the current recommended NUT disassembler?

(07-13-2022 06:42 AM)J-F Garnier Wrote:  

(07-10-2022 02:47 PM)Stevetuc Wrote:  This is discussed in an earlier archived thread.
https://archived.hpcalc.org/museumforum/...08646.html
Olivier De Smet has produced a rom patch with 224 registers and J F Garnier one with 192 registers.
Hopefully they will make the patches available on the forum.

Not only Olivier and I. Probably Eric Smith and HrastProg were the first ones to do it around 2006. And don't forget David (SwissMicros). For various (or obvious) reasons none has been published.

So yes, I have a 192-register patched version, that I first built for my private HP-15C emulator (emu15) in 2011.
I then tried the same patch set for the HP-15C emulator for Windows from HP, and fortunately it worked well meaning that the emulator allocates enough RAM space, probably the full 256-register space.
Since the HP emulator and the physical HP-15C LE are very close (even the PSE bug is "correctly" emulated), we can guess that the HP-15C LE also allocates the full 256-register space (it would be a very small gain not to do it, and would complicate the emulator code). But of course this is not guaranteed and must be tested.

Since my 2012 message, I also patched the MEM display to have a nice display for all memory partitions, not only the initial 94-99 allocation.
I didn't release my patched HP-15C XE (eXtended Edition) emulator yet, mainly because:
- the exe file was (still is) copyright HP,
- patching the exe file corrupts the HP digital signature, which may be interpreted as a potential risk.
Now, 10 years later, and as HP-15C LE ROM images have been published here, I think I can release my HP-15C XE emulator and the corresponding patch list, for "research and education purposes only".