Hi, I'm trying to repair a bally baby pac-man and in test mode it prints the following text:

"Communications" "RCV" "XMIT" and "RCV"

but I expect also the numerical characters (10,20,30,30,40 or 00,00,00,00,00 if communication fails) but they don't appear.

I checked all communication lines and they look fine.
Because I don't see any results of the test, I suspect that the rom(s) might be corrupt. I can read out the rom but I do not have an eprom eraser or a new 27c64 eprom to test the older version that you can find on the internet.

I have currently an 891-16 version in u9.

This information I can get out of the babypacman.txt that is included in the romversions (891-13 older!!) you can find on ipdb.net :

>> VID_U9.764 or 891-13_9.764 - U9 for VIDIOT, 2764 [DFFF]
>> VID_U10.764 or 891-11_10.764 - U10 for VIDIOT, 2764 [30FF]
>> VID_U11.764 or 891-05_11.764 - U11 for VIDIOT, 2764 [1AFF]
>> VID_U12.764 or 891-06_12.764 - U12 for VIDIOT, 2764 [F0FF]
>> VID_U29.764 or 891-12_29.764 - U29 for VIDIOT, 2764 [3AFF]
>>
>> NOTE: We found a Bally Service Bulletin, dated
>> July 11, 1983, that refers to a set of ROMs
>> with 891-16 (presumably a newer revision)
>> at VIDIOT location U9. We have no idea what
>> that is, and can't locate a copy of the chip.

So apparently I have this newer version.....

Is there somebody that has the 891-16 version in rom images so I can compare them?

I can also send the newer version so somebody can update their pacman with the newest version and feedback to me if they work

20170103_194235 (resized).jpg

This is how I expect it should look like, but its not the case.

pasted_image (resized).png

thx this helps,

I get 10 flashes so the vidiot boots fine.

Just an update, I found the problem, its was the dip-switches, they were switched to the on position, when I flipped them all to "Off", the baby pac-man was working like it should.

later I found this post:

http://coinoplove.com/Babypac.html

The guy had the same issue, apparently there is a freeze switch on the dipswitches. Anybody an Idea which one is the freeze switch?

quote:

"After some time to pull back and brainstorm, I remembered that other Bally/Midway games had a freeze switch in the DIP banks, so checked, and all the DIPS were turned “On”. I turned them all off, and YIPPIE!!!! Game screen!!!!!"

Thx for the help guys...