Cheese Chase: Fixed with pics

[trm]

No problem. PM me your address and I'll stick it in the post. Just powered up the board and heard it speak the title and version so it looks like a good 'un.

cheers

 

[Alpha1]

I gave backflipper a box full of Golden Tee pcbs. He should still have them.Alpha12013-09-26 21:29:46

 

[guddler]

Yeah, PLCC is no good for me. Well, at this stage anyhoo. If it becomes a last resort then I'd frig up some kind of converter...

 

[Macro]

Gud - PM me your address, the one on the 'golden par golf' is DIP so that should fit.

 

[guddler]

Very kind - incoming!

 

[trm]

Audio IC went off today Mike.

 

[Macro]

and DAC went off today, hope it sorts the video out so you can get chasing cheese

 

[Alpha1]

 

[guddler]

Cheers Mike - fingers crossed!

 

[Macro]

Guess what I just found in a pile of PCB's I hadn't got around to looking at ...

yep, I also have a cheese chase!

oh, and just been sent this link from the Mame group -

http://francksauer.com/index.php/games/15-games/published-games/20-cheese-chase

Macro2013-10-01 14:17:45

 

[guddler]

Yeah, been in touch with Franck from that link to ask about schematics already (there aren't any about incidentally).

So, erm, yeah. I hope yours works then! Plug it in, it's Jamma.

Chip received this morning thanks so at least by tonight I'll know if it fixed the issue or not, even if you may need it back

 

[Macro]

No worries about that, I sent it to you, if you need it, it's yours!

mine has some eproms missing, so need to sort them out first.

 

[Macro]

on the plus side, if it's any of the PAL's that have died, I *may* be able to dump them.

 

[guddler]

Yes, that would be handy!

Be aware that with the Jamma connector at the top, in the bottom left there's a 48pin DIP socket and it's meant to be empty for Cheese Chase...

Think thats the only one though.

 

[Macro]

it's got a chip in on mine, but nothing in U134-U137 (where the normal graphic eproms go I guess)

 

[guddler]

Interesting! You sure it's Cheese Chase? I think the board was used for a couple of games.

 

[Macro]

well, the custom says 'A&M-001-01-A' which doesn't find anything in google and the previous owner nicked all the eproms

so, not sure what it is unless I can read the 42 pin mask rom and romident it

better check Mame source for what else it could be.

 

[Macro]

ah, it's ultimate tennis !

well, different roms to program then, since it uses different blitter encryption.

 

[guddler]

Happy to report that I was spot on with my diagnosis and that the new DAC / colour palette chip has fixed the fault. Rather strangely it's fixed a sound fault as well that the board had at the start of the game too (speech at the start came out as white noise) and the error light no longer flashes on the PCB. Slightly odd that but hey!

Just popped down to the house for a USB stick. Expect bad signal Vs good signal from the scope shortly...

 

[Macro]

well, this one plays the startup tune and then flashes the error light, but nothing on screen

checking the DAC and /RD and /WR are both high, take DAC out and they show activity - hmm, does that sound familiar

oh well, should have a few more IT boards sitting around, if not will mark it up as needing a DAC for when I bump into one.