Installing the 96 in 1 Multi Pac – Part 1

One of the most popular and rich arcade game kits for most collectors is Dave Widel / Mike Doyle’s 96 in 1 Multi Pac-man kit. With just a few simple changes in the chips on your Ms. Pac-man PCB you can play 96 different games, including many different mazes for Pac-man, Ms. Pac-man, and Pac-man Plus as well as Pengo, Space Invaders, Eyes and more!

I found that purchasing the Multi Pac kit was an awesome experience. I emailed Mike Doyle, sent him money via paypal, and in a couple of days my kit arrived at my house, ready to roll. I had special circumstances because I wanted to have the kit at my house by Thursday night because I was having a party where I wanted to be able to show off my newly upgraded Ms. Pac-man machine. I ordered the kit on a Monday and I had it by that Thursday, on time to the T. Mike gave excellent communication throughout the short transaction.

Here is what you get;

96 in 1 Multi Kit Items

A set of printed instructions (PDF), a small pcb and a ribbon cable.

The instructions are written simply, and to the point. I am going to include snippets of them here to help explain the installation. Here are the general installation instructions;

Installation Instructions

Unpacking: Your Multi Pac is shipped with the 5E sub-board inserted into one of the 40-pin sockets to protect its legs. Carefully unplug it from the socket, and unwind the sub-ribbon cable to begin installation. You should start with a working Midway pacman PCB (or Ms Pac), however since none of the original ROMs or their sockets are used, on occasion this Multi board will revive an otherwise non-working board that has issues with row 6 ROMSs, or 5f. It’s worked a couple of times for me, but your mileage may vary.

Decide which board you have: The Multi-Pac supports a variety of boards which are covered on page 6 of the manual. For Ms Pac and Pac begin at Step 1, for others refer to page 8 titled: Multi-Pac Manual Addendum: Installation on boards besides Midway.

I will be upgrading my Ms. Pac-man board, so that is the PCB I will be using for this photorial. If you are still bootleggin’ like it’s nineteen eighty three, Shaft say you be outta luck in dis tutorial. But seriously, I am sure making the swap on most any PCB is pretty easy. Back to the instructions provided;

Step 1: Remove the four EPROM’s in row 6. If you have to remove the Syncbus card to get to 6E, make sure you plug it back in the same way (chip notches match main PCB).

Here are some photos showing the section of the PCB that the instructions are referring to. In the first two photos you can see the EPROMs at 6J, 6H, 6F, 6E. The Syncbus card is the elevated mini PCB with the dusty 20 year old zip tie:)

Row 6 EPROM's 1Row 6 EPROM's 2

Here is a photo showing those four EPROM’s removed from the Ms. pac-man board. Removing chips is really easy, and this is something you’ll want to do a lot. Even your grandma approves, she says practicing this activity won’t make you go blind. So do a little less of that “other thing” you do in the dark and more playing with your circuit board.

Removed EPROM's

There are chip pullers you can try and can purchase one at most any major arcade dealer like HAPP, or probably even from Bob Roberts. The main idea is to make sure you remove the EPROM, processor, or whatever else without bending the legs. A small screwdriver will usually do the trick and a little Patience, yeah, yeaaaahhhh. Just a little Patience. Here is the set of mini screwdrivers I use constantly.

Small Screwdriver Set

Step 2: If you’re converting a Ms Pac board, remove the Z-80 from the Ms Pac auxiliary board and place it in the Multi board in the 40-pin socket near the center, with the notch in the same direction as the other chips on the Multi board. Then plug the ribbon cable in the 40-pin socket closest to the edge of the Multi board, orient the cable per the diagram on page 2.

Here’s that diagram showing where you plug in the ribbon cable straight from the multi pac kit instructions;

Multi Pac Kit Diagram

I apparently didn’t get a photo of the Ms. Pac-man auxiliary board with the Z-80 processor still secured but here’s a photo after I removed the processor. Just like the chips, you will need a very small flat head screw driver and gently work the chip upwards, twisting the driver back and forth until the chip comes out.

Ms. Pac-man Auxiliary Board

Now put that Z-80 processor in the Multi Pac-man board in the open socket. Make sure to orient the chips correctly as the instructions warn. You can destroy your Z-80 processor if you power it up with the chip incorrectly socketed. But fortunately, you would just destroy the processor and not the board, and if the angels shine highly on you, you may not even trash the processor. I personally don’t like electronic risk, but if that does it for ya. Go right ahead. Just look at the half moon inset on the chip to make sure you line those moons up with the socket in the right direction. As a general rule of thumb, you can look at the direction of the half moons on the chips around the one you are pulling, but that is not a hard and fast rule. Take note of the direction when pulling an EPROM and just make sure you put it back where you found it.

Z80 Processor in Multi Board

Ok. We’re pretty far along here, there aren’t too many steps left before you have your Multi-Pac kit up and running. Check back for Installing the 96 in 1 Multi Pac – Part 2 where we’ll pull 5E and 5F and finish up installing the small graphics board and mounting the multi kit in your cabinet. And of course, enjoying your 96 different versions of Pac-man, you yellow pizza freak!

Go to Installing the 96 in 1 Multi Pac – Part 2

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