Thrillhouse
Enthusiast
I have both a 10mhz and 12mhz CPS1 short A boards. I've recently made repro 1941 and Daimakaimura boards for myself, so I opted to upgrade the crystal on the non-DASH board to 12mhz. On either of these games, there would be a light stuttering or slow downs on complex scenes. Both work flawlessly on the factory DASH A boards.
I bought a few 12mhz crystals (from a listing suggested in another thread here) on eBay and swapped in the replacement and.... performance actually got worse on both of these boards. Stuttering is worse than with a 10mhz crystal! I redid the soldering job, and it's pretty clean. The crystal appears to be oriented correctly, using the same marking dot position as the old crystal.
Before I try a different 12mhz crystal or go too much further I just wanted to make sure - am I missing something here?
Here is the part I'm using: https://www.ebay.com/itm/12MHz-Xtal...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649
I bought a few 12mhz crystals (from a listing suggested in another thread here) on eBay and swapped in the replacement and.... performance actually got worse on both of these boards. Stuttering is worse than with a 10mhz crystal! I redid the soldering job, and it's pretty clean. The crystal appears to be oriented correctly, using the same marking dot position as the old crystal.
Before I try a different 12mhz crystal or go too much further I just wanted to make sure - am I missing something here?
Here is the part I'm using: https://www.ebay.com/itm/12MHz-Xtal...e=STRK:MEBIDX:IT&_trksid=p2057872.m2749.l2649