(Topic ID: 222797)

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

By pincoder

5 years ago

Topic Stats

336 posts
48 Pinsiders participating
Latest reply 4 months ago by DumbAss
Topic is favorited by 75 Pinsiders

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Linked Games

Algar Williams, 1980
Alien Poker Williams, 1980
Barracora Williams, 1981
Black Knight Williams, 1980
Black Knight Limited Edition Williams, 1981
Blackout Williams, 1980
Contact Williams, 1978
Cosmic Gunfight Williams, 1982

There are more than 8 games linked to this topic.
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Topic poll

Sort: Original A-Z Score

“Which test ROMs have been the most useful for you?”

01a-leds 2 votes

13%
01b-bus 0 votes
01c-transceivers 0 votes
02-blanking 0 votes
03-cmos-IC19 4 votes

25%
04-ram-IC13 3 votes

19%
04-ram-IC16 3 votes

19%
05-displays 2 votes

13%
06-switches 1 vote

6%
07-bounce 0 votes
08-interrupts 1 vote

6%
09-lamps 0 votes
10-solenoids 0 votes
11-sounds 0 votes
12-sounds2 0 votes
clear_cmos 0 votes
edit_cmos 0 votes
init_cmos 0 votes

(Multiple choice - 16 votes by 5 Pinsiders)

This poll has been closed.

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LTSpice sim of BLANKING keep-alive in test ROM (resized).png

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Hello @pincoder, I have a bear of a problem with a Williams system 6 cpu board.
The board works in attract mode and audits and game play.... I have used different test roms.
All give a good clean ready to go analysis.
However, the minute you put the game into test mode you get the two led's flashes
and the board crashes... no past go.. no nothing.
Also manual cpu board reset dips do not work because of this crash.
I can press the diagnostic push button and get the two led's to flash.
I can see the signals with the logic probes and Oscilloscope...
I do not know if the test roms you have can help diagnose and test
this kind of problem.
Any input would be appreciated.

OP
Quoted from pincoder:
I'm not familiar with the firepower deluxe mod.

It is kind of cool... The guy added modes to the rule sets.
The game has more objectives to do...

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