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(Topic ID: 222797)

NEW! Williams System 3-7 In-Game Test ROMs


By pincoder

2 years ago



Topic Stats

  • 241 posts
  • 34 Pinsiders participating
  • Latest reply 3 months ago by pincoder
  • Topic is favorited by 61 Pinsiders

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#20 2 years ago
Quoted from zacaj:

Yes but why does reading the dips and doing a jump require subroutines?

You're not even reading the dips, you're simply using them to present a different chunk of rom to the board, which is reading it as a 2716. Same concept that the Alltek uses to select its games, and lots of old computers from the 80s did when you had different OS chips in them for various "purposes".

Now, if you mean the dips on the mpu board, yes, that would be a bit different, but you are correct in that performing the JMP doesn't require any ram.

1 month later
#71 2 years ago
Quoted from pinball-museum:

It does specifically use a 2764 not the one you said

The 28c64 is compatible to a 2764. You could quadruple them which is the easiest way to ensure you're getting the code 'where it belongs' but in general, anytime you combine roms the highest one in the series is the one that a 2716 would be on a single chip setup (which the test roms are).

This is because the bootup address pointer needs to be in the last 2 bytes of rom.

3 months later
#84 1 year ago
Quoted from Tuukka:

I have one of these. At $33, a bargain.
ebay.com link ยป Usb Minipro Tl866cs Universal Bios Programmer Eeprom Flash 8051 Avr Gal Pic Spi

Make sure you get the CS version. Minipro started shipping the "II" version and it removes the ability to program anything about 18 or 16 volts, and there are lots of pinball chips that you need the 21 volts the cs maxes out at.

2 months later
#109 1 year ago

Don't know about the error but the II plus won't do over 16 volts so you won't be able to do older eproms like 2732,2716. When they announced the changes to the product that it won't go over 16vdc I ordered a couple extra of the CS's.

If you keep using the eeproms you should be fine but I have 100's of the old eproms that I erase and reuse constantly so it's a non-starter for me if it won't do them. I have an ancient data i/o that I keep for the 25v ones I run across but the software is terrible and a 2732 takes almost 5 minutes to program, and I have to keep a dos based machine with a parallel port to use it. Strictly for emergencies.

2 months later
#166 1 year ago

http://www.pinwiki.com/wiki/index.php?title=Williams_System_3_-_7#System_7_MPU_Test_Pad_Info

You can probe almost all of the signals right on the unpopulated connector in the lower right. Very handy.

8 months later
#225 6 months ago

If the tension seems bad in the RN sockets, or the chips in them were really corroded, might be a good idea to replace.

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