I propose this patch for the Conic Computer Chess (cncchess2.zip) in order to respect rules of castling (black and white).
The problem appears in https://www.schachcomputer.info/foru...postcount=4729, by Franz (fhub).

Unzip cncchess2.zip, with a binary editor change old byte value with the new one (offset begin at 0) in the file c11485.u2 .
Rename the old cncchess2.zip to keep the original, and create a new cncchess2.zip with the modified c11485.u2 .


offset old value new value

4F2 EA 60
4F3 EA 18
4F4 EA 69
4F5 EA 46
4F6 EA C5
4F7 EA 50
4F8 EA 4C
4F9 EA 84
4FA 60 16

67A 09 A9
67B 04 06

680 09 4C
681 70 F3
682 C5 14
683 50 EA


Cordially,

mychess

Oh, a new medical doctor for chess computers!

We already have a few 'modified' ROM versions with bugfixes in CB-Emu, so I'll probably also include this one.

Many thanks,
Franz

Hello Franz,

Not a new doctor for chess computers : first modification was on Sargon I on the trs-80 in 1981.
Patch is a patch, not the best solution.
Where I can send you the new file ?

Cordially,

mychess.

Hi mychess,
but the only method, if the source is not available.
Thanks, but that's not necessary - I've already created it with my own patcher.
And it's also already in my CB-Emu version ...

Regards,
Franz

Hi Franz,

The new file is not the patched file.
I have re-assembly with a better respect to a time critical routine (not necessary for the emulator, but perhaps for a real eprom).

Cordially,

mychess

Ah, I thought you mean your posted patch.
Well, I can't burn an eprom and I don't have this real device, but if this new version is useful for the emulation, then you could just send it to me as attachment in a PM.