Sp33dFr34k
Champion
Thanks. I already tried to bridge those points with a piece of wire, nothing has changed. I'm not too sure if the traces go to the same pins on the chips, so a clear picture of the bottom of the board would surely help
They are 2Ω resistors and can be replaced by a piece of wire.@Apocalypse I was having a dull moment. I was switching the resistor in PB4, not G4. I actually don't have any resistors in G4 so that might be the problem. Can you check the value of the resistor and to which pins it goes please? Or maybe you can @Yippikaye? I have a feeling it might have something to do with that weird patch wire I have? Thanks!
The problem is I don't even have the solderpoints where the resistors are. So I need to "simulate" whatever is being bridged by PC1. I'm talking with @Yippikaye about this, but it's difficult to trace where they lead to. Can you help out which pins I need to bridge @Apocalypse?They are 2Ω resistors and can be replaced by a piece of wire.@Apocalypse I was having a dull moment. I was switching the resistor in PB4, not G4. I actually don't have any resistors in G4 so that might be the problem. Can you check the value of the resistor and to which pins it goes please? Or maybe you can @Yippikaye? I have a feeling it might have something to do with that weird patch wire I have? Thanks!
Probably my fault as I mistakenly mentioned it (I was working on something else with lots of 10k pull-up resistors at the time of writing and my brain just got confused).b) I used a 10k resistor to connect PC1 (not sure why... did I read that somewhere?) -- it's now just a wire jumper.
Anyone do this yet? Otherwise I'll probably give it a shotThanks for the info, please share your results if you make the upgrades.I did the conversion and it works. Thank you so much!
One minor gotcha if you're using a Squash (you should use a Squash): on the board I got, the CPU is underclocked to 10 mhz. The oscillator close to it is 20 mhz when it should be 24 (it has 24mhz silkscreened on the board). You might want to add a possible oscillator swap to the instructions. After all, the CPU installed is rated for 12 mhz anyway. I imagine some Squash boards might have 10 mhz rated CPUs soldered in as well, but I've only seen one so far.
MAME says a real board runs at 12 mhz, but I'm wondering if it's possible to upgrade it all the way to 16 mhz and get rid of all the slowdown. I might try that later but desoldering stuff out of this board is a real pain.
It's an original. I've had some Gaelco PCBs with EPROMs soldered and the same round shaped gold stickers.No mask roms so it's probably a conversion.
Typical issue with Gaelco boards.Ignore the top of the screen, I haven't messed with that yet and just assume it's my sync settings on the tv or at my supergun.
Is it anything more than playing with the sync at the monitor/supergun level? If it's something typical and it's a fix on the pcb, let me know!Typical issue with Gaelco boards.Ignore the top of the screen, I haven't messed with that yet and just assume it's my sync settings on the tv or at my supergun.