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PS: TO the Pengo emulator author: PLEASE ADD A VOLUME CONTROL!!!  EVERY TIME I LOAD IT IT BLASTS MY EARS OUT LIKE THIS!  It does'nt matter what the mixer volume is, when I run the Pengolator, it ALWAYS MAXES the volume and blasts my ears out (my card has no rear volume knob, and I'm using unpowweres speakers...)

As for the booting, I've looked over the schems, and it does appear that the +12v only goes to the amp. I would try removing the amp chip, then see if it boots with the 12v connected. If not, there may be a hairline short somewhere affecting the logic. If it does boot with the amp removed, it may well be a duff amp. The amp   is connected indirectly to the logic of the CPU, so it may be upsetting it.

wiretap.spies.com

The screen shows a repetitive pattern of (correct) ice-cube graphics, which will change if the DIP-switch setting is altered or the joystick is pushed. The sound amp seems to be ok, as the pot produces some noise when turned. The CPU seems to be ok, as the board reacts to switch settings.

Are you getting 12 volts to the audio amp chip? Possibly a harness problem? or a power supply problem in the 12v?

The screen shows a repetitive pattern of (correct) ice-cube graphics, which will change if the DIP-switch setting is altered or the joystick is pushed. The sound amp seems to be ok, as the pot produces some noise when turned. The CPU seems to be ok, as the board reacts to switch settings. My guess is, that at least one of the EPROMS is partially unreadable, or (worse) some video logic ist broken. It would be nice if someone could dump the EPROMS of his board and send the binaries to me or/and give some other repair hints.  

I think it depends on which revision rom's are installed. I believe revision 1 has the Popcorn music where as revision 2 doesn't. John G.

If you're a MAMEr: pengo        Popcorn Music + screen wipe music pengo2       Other music, fast wipe pengo2u      Other music, fast wipe penta        Popcorn Music + screen wipe music If you want the mp3:

I rigged a switcher to the harness, supplying the proper voltages, and the monitor is still fed thru the iso transformer.

02-Pengo.mp3 (322k)

sinistar wavs are here: