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Author Topic: Ms. Pac Man to Pac Man?  (Read 7787 times)
Muerto
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« on: August 26, 2010, 10:04:38 PM »


Hiya guys

I have an original Ms. Pac Man PCB in my Pac Man cab (doh - we all had!)
Can i by a swap of some ICīs/chips make it into a Pac Man PCB again?
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Level42
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« Reply #1 on: August 26, 2010, 10:37:11 PM »

But of course. Ms.Pac was a hack of Pac.
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Muerto
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« Reply #2 on: August 26, 2010, 10:50:44 PM »

ok, a very nice hack which had itīs own dedicated cab!  Cool
well, that is easy then, iīm trying tomorrow with the roms i got from gyruss! - i let you know (gyruss) if they work!
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Level42
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« Reply #3 on: August 26, 2010, 11:09:35 PM »

You never heard about Crazy Otto ?

Copied from Wikipedia:

Ms. Pac-Man was originally conceived as a bootlegged hack of Pac-Man called Crazy Otto, created by programmers employed at the General Computer Corporation (GCC).[2]
The programmers, surprised at the quality of the game they had created, showed it to Midway, Namco's American distributor of the original game. Midway had become impatient in waiting for Namco to release its next Pac-Man game (which would be Super Pac-Man), and were enthusiastic that such a game had come to their attention. They bought the rights to Crazy Otto, changed the sprites to fit the Pac-Man universe, renamed the game Ms. Pac-Man, and released it into arcades.[citation needed]
After the game became wildly popular, Midway and GCC undertook a brief legal battle concerning royalties, but because the game was accomplished without Namco's consent, both companies eventually turned over the rights of Ms. Pac-Man to Namco, fearing a lawsuit. Nonetheless, Ms. Pac-Man was the first of a series of unauthorized sequels that eventually led to the termination of the licensing agreement between Namco and Midway.[2] Ms. Pac-Man was later released on the third Namco Museum game; however, there is no mention of it in Namco's official archives (including the archives on all of the Namco Museum releases).
In 2001, Namco released an arcade board featuring both Ms. Pac-Man and Galaga in honor of the 20th anniversary of both games. It also features Pac-Man as a hidden bonus game. The later 25th Anniversary Edition allows all three games to be selected at the main menu.[citation needed]
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Muerto
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« Reply #4 on: August 26, 2010, 11:21:19 PM »

ok, interesting!!
Love stories like this!!!

Any other games who had been done the same to?
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Level42
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« Reply #5 on: August 26, 2010, 11:37:27 PM »

MC. They made Super Missile Attack.

Man you have to google more Wink

http://en.wikipedia.org/wiki/General_Computer_Corp.

About the EPROMs, pretty soon you can get your EPROMs from me.... Cheesy

Oh and the conversion is very simple:

Remove the Ms. Pac daughter board and ribbon cable. Take the cpu out of the daughter board and place it where the ribbon cable was hooked up.
Make sure you place the cpu in the proper way.

Replace 5E and 5F eproms with Pacman eproms.

But uhmmm, Ms.Pac Man is much better then Pac Man......  Grin Grin Grin Grin
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« Reply #6 on: August 27, 2010, 01:03:44 AM »

I already have one Ms. Pac Man and thereīs no fun in having the same machine twice.. Except for my 2 Ice Cold Beerīs!!!!!
But ill give it a go tomorrow!
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« Reply #7 on: August 27, 2010, 08:23:51 AM »

Ah oh yeah I forgot...let's see which one you will play the most Wink
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gyruss
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« Reply #8 on: August 27, 2010, 09:17:47 AM »

I wonder if they will work. Fingers crossed! Grin
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Muerto
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« Reply #9 on: August 27, 2010, 12:08:45 PM »

Tested gyrussīs roms with following results...





 Huh? Huh? Huh? Huh? Huh? Huh?
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gyruss
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« Reply #10 on: August 27, 2010, 12:27:32 PM »

mmm that doesn't look too good.  Huh?
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Level42
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« Reply #11 on: August 27, 2010, 01:35:52 PM »

Well.....maybe......just maybe......


it would work better if you inserted them the RIGHT WAY ROUND !!!!!!     roll eyes roll eyes roll eyes roll eyes


There's a NOTCH cut out on one side of the EPROMs indicating where pin nr. 1 is. They are clearly pointed in the opposite direction of all the other chips on the board.

The sockets also always have a notch or a dot indicating pin 1. ALWAYS match that, do not ever look at labels.....

I hope you didn't ruin anything on the board now....




In general the designers of PCB's tend(ed) to keep the orientation of the chips in one direction. THIS IS NOT A LAW or anything so there are exceptions, but in _general_ the chips usually "point the same way".

As you can see in the picture the notches are all towards the right on this picture. The ROMs you inserted have the notch pointing the other direction !

ALWAYS check what way the chip was inserted before removing it. If you don't remember, check the socket, this should also have a notch or a dot. Even the white printing on the PCB has a "notch" indication.

I fear the EPROMs may be damaged now.

Don't feel too bad about it, I screwed up with a SW prom one time too....it happens to everybody sooner or later. The PROM was toast but luckily Andreas burnt me a new one and there was no further damage on the board.

« Last Edit: August 27, 2010, 01:54:00 PM by Level42 » Logged

Muerto
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« Reply #12 on: August 27, 2010, 01:48:23 PM »

hmmm...

Turned the E5 and F5 around..... and woila! - no change...




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Level42
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« Reply #13 on: August 27, 2010, 01:54:30 PM »

Did you watch the notch of the processor ?

You did remove the processor from the extension board and move it into the socket where the ribbon cable was connected before, right ?

If so, and if the notch is correct, I bet the EPROMs are toast.

Oh and, I _do_ assume the board was working when it still was a Ms.Pac ?
« Last Edit: August 27, 2010, 02:05:15 PM by Level42 » Logged

Muerto
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« Reply #14 on: August 27, 2010, 02:27:48 PM »

I just rechecked the notch on the prosessor, and itīs pointing the same way as the romīs....
And it was working when it was Ms. Pac Man...
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