A friend of mine asked help with an G. Excalibur.
Game rom 2 did not work. The rom from web can not be writen into chip due some kind of error.
The same chip with other roms works ok.
The pcbs with other rom set works ok.
So we would like to ask someone who has a 100% working set of excalibur roms plese share it with us. Thanks
It may also be an opportunity to install the FREEPLAY 
Take a look here : https://www.flipprojets.fr/Proms80B_EN.php
Excalibur has been produced in three languages : 715 (US), 715X (French) and 715Y (German).
Of course, the PROM1 and PROM2 set must be coherent. If you use a 715 PROM1, you mandatory need a 715 PROM2 (and not a X or Y).
I'm in need of the Rom files for a Gottlieb Excalibur. Could someone please PM me on where to find them? I would greatly appreciate it!
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Debrecen
Piershil