Turns out, it was the sound board itself. I swapped the sound roms with another soundboard, and boom! Working perfectly with speech! I'm gonna reflow the OKI chip on the bad board at some point and see if that helps. Thank you guys for your insight! 🙂
Right, that makes sense. It's just that I've tried different roms, (which were verified blank), and nothing is working properly. I'll have to source some different eproms and keep trying. I appreciate all the insight fellas. Thank you!
I do have the 27C010A for U3...once I burned that, I got music and sound effects back. It's U12 and 13 that seem to be the problem. Unless it truly is a bad OKI chip. I always verify each eprom before install as well. Everything is correct...as far as the eproms are concerned anyhow.
Also, I've tried different chips for U12 and U13. 27C010 and 27C2001, I was unable to burn to, because the chip programmer stated that the chip was to small for the data? So I tried 27C040 AND 27C4001...but yet none of them seem to be working. Unless it IS the OKI chip? How would I go about...
Got a little issue...I've burned all the necessary roms for this, everything checks fine...sound board checks ok. The only thing that's missing is the speech. I literally have music, and certain sound effects, but absolutely NO speech whatsoever. Anybody have any insight as to why that may be...
Another question...how would I correctly wire up a kick harness for the Minigun header pins? Like orientation-wise? I can easily find pinout diagrams for specific pcb's, but is there a pinout diagram for the Minigun?
Fun fact: I just noticed that the RGBS cable that comes with the GBS pcb, is the perfect size for the kick harness header on the Minigun...just a couple pins extra. Good to know! 😉
I've tried the dip switches, and they don't seem to do anything...I'm probably missing something, as per the usual. Mainly for MK's, Street Fighter, etc.