Caesars Palace Gameboy - one bit

I have a story to tell about the Caesars Palace Gameboy game - one of the first games I produced, if not the first game.

I wondered if my original Gameboy would turn on.  Yes!

The screen has some issues but otherwise it works!

There were two versions of Caesars Palace for the Gameboy.  The one shown above was published by Arcadia, a label within Virgin Games (then Virgin Mastertronic).  That version had a tiny bug not found during testing - if you doubled your bets over and over, and happen to win, eventually a money counter would overflow.  The fix was literally a one-bit change to an instruction to handle overflow differently.

Nintendo told us we would need to recall all the games and fix them.

We said, "this bug is extraordinally difficult to get to happen, and requires incredible luck."  Nintendo relented, thank goodness.  We fixed the bug for the next run of cartridges, and if someone did hit the bug, and called us, we'd send them the fixed cartridge after telling them, "Congratulations!  You broke the bank!"

Of course, in testing, nobody considered to double down on every single bet, and even if they did, also win enough times to overflow, which is why the problem wasn't found before it shipped.  But once a hundred thousand cartridges were purchased and played, not just by the person that bought it but by friends and family, someone was going to try it, and succeed!  So a few people hit the bug.

You can tell the original version because the cartridge says "Arcadia" while the fixed version says "Virgin Games."

Yup, one bit in an add instruction.

p.s.  Why isn't it Caesar's Palace?  Is it full of Caesars?