Author Topic: EPROMS - Early Bally  (Read 241 times)

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Offline stuba

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EPROMS - Early Bally
« on: October 20, 2008, 07:53:25 AM »
I'm interested in what people do with eproms on the early bally machines 1977-85 (nino?). I note that you can mess with the jumpers to change them. I have a squawk and talk that I have finally got working only to get some weird sounds out of (mostly correct but just a bit odd and damaged sounding - its the roms as i have tested another set that work fine in the board). It does have an original masked rom and then a couple of non matched newer roms. The masked rom seems to be the issue. After my 'research' I just thought I'd get a matched set of 2732's and jump the board accordingly? Gotchas to watch for?

Offline Strangeways

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Re: EPROMS - Early Bally
« Reply #1 on: October 20, 2008, 08:11:56 AM »

2532 Roms are hard to find and the programmer able to program these is even harder to find. I think Ken has done this successfully in the past. I will be doing a few S&T boards in the next few months, so I can write up a guide.

There is not a lot of info on the S&T boards - Even Clay does not go into great depth in his guides.

Maybe this document would be a starting point ?

http://marvin3m.com/bally/squawk.htm

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Offline humpalot

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Re: EPROMS - Early Bally
« Reply #2 on: October 20, 2008, 09:21:50 AM »
Yeah 2532 and 2716 are used on the S&T boards.  Just burnt eproms for 2 different games.  The 2532's are easily obtained from ebay.  I have a data i/o 29B programmer that I use to burn these roms with.

If you get stuck and ask very nicely I might assist with the burning  ::)

Offline stuba

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Re: EPROMS - Early Bally
« Reply #3 on: October 20, 2008, 10:33:16 AM »
cheers and thanks for that. if you look at

http://www.pinrepair.com/bally/bally_read1st.txt

its says you can jump them for 2732 as well as the others mentioned. I'll test this when i find some roms and note it here.


If U3 is a...          ...then jumper this way

        -------------          -----------------------------------
        9316 ROM or            install Q and T, remove R and S
        2716 EPROM

        9332 ROM or            install Q and S, remove R and T
        2532 EPROM

        2732 EPROM             install R and T, remove Q and S




Offline Strangeways

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Re: EPROMS - Early Bally
« Reply #4 on: October 20, 2008, 10:57:11 AM »

I was under the impression that 2532 were very difficult to find. Glad to hear they are still available.
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Offline Retropin

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Re: EPROMS - Early Bally
« Reply #5 on: October 20, 2008, 11:53:52 AM »
Stuba,

Ive got about 30 X 2732 if you need any -all are blanks.

But mate, your gonna have to come round to get them...
... Then again, i could drop em off to you and wear out a few of your pins instead

Offline stuba

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Re: EPROMS - Early Bally
« Reply #6 on: October 20, 2008, 12:25:02 PM »
deal. just want  to get 3. given your pinballs are rarer I'll visit you  *%*.
will try and figure out this fan dangled message system.. pm on its way if i can..