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Ms. Pac-Man = Pac Man Board + "Game Genie" logic + New Roms
http://forums.nesdev.com/viewtopic.php?f=5&t=16127
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Author:  Dwedit [ Thu Jun 22, 2017 7:25 am ]
Post subject:  Ms. Pac-Man = Pac Man Board + "Game Genie" logic + New Roms

So I was watching the GDC Postmortem (I hate that word) on Ms. Pac-Man (1hr 2min video), and found it very interesting how they actually constructed the board for the game.

The game remained a Pac-Man conversion kit to the very end, and uses all the Pac-Man roms and other hardware. Except when it fetches specific instruction bytes, then a Game Genie like system takes over and lets it jump to code on new rom chips.

They also put in all their protection hardware too.

Author:  mikejmoffitt [ Thu Jun 22, 2017 10:38 am ]
Post subject:  Re: Ms. Pac-Man = Pac Man Board + "Game Genie" logic + New R

Ms. Pac-Man is an interesting binary hack of Pac-Man. If you have burned Ms. Pac-Man (bootleg modified to run on straight Pac-Man PCB) and Pac-Man to two banks of an EPROM, and you bankswitch mid-game, it generally works fine and leads to some interesting effects.

Author:  rainwarrior [ Thu Jun 22, 2017 10:59 am ]
Post subject:  Re: Ms. Pac-Man = Pac Man Board + "Game Genie" logic + New R

Yeah, that's a really great postmortem. I watched it too a few weeks ago. I especially liked the Lite-Brite as a sprite editor.

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