Recent content by mypinballs

Update. I have a road graphics issue and a sprites lines issue to solve. The sound is working along with music and speech ok after wiring up. Non standard jamma connections for the sound so needs some mods to a std harness. Also needs -5V for it to work. All pals have been converted and tested...

PAL ics wise i will be converting all the files for this game into modern ATF22V10 and ATF16V8 files so i have them saved for future. and for others that may need them to

So what i think was happening here is the the DTACK signal was being held by a partially shorted input 11 on the pal which meant that non of the other active low signals could get a look in!! ha It also meant that the signal could not return to VCC when it needed to and created this weird...

Well, 3 years later... I was having a tidy up recently and came across my SCI Board again. Love this game and it drew me back in as i sat there looking at where i'd got to before. Seems also liek there have been others fixing these boards since i first looked at mine and more info. Also with...

Which rams When you say all ram in the main cpu area, which ics? did you mean just the first cpu(cpu A) ie the one using 4 roms or both cpus? ie main and sub? Wasnt the pal ic you mentioned part of the sub cpu area? I'm thinking of trying again on my board and trying to determine what...

Yeah, i'm wanting to know if anyone else has an original kit running as these original kits do not work in my original upright. I know i have some changes to make on my version boards, now i have an original one to look at, as I started my project before i thought i would ever find an original...

I was wondering if there is any info on what can be wrong if you have a boardset where non of the 3d models/polgons appear, but the other layers like backgrounds and text show. Also all tests pass like memory and tgp test so i am at a bit of a loss. It doesn't feel like its gonna be something...

Does anyone have any information on Daytona to the MAXX upgrade for Daytona USA (model 2), ro have you got a kit in your game that runs?? I have 2 original kits for this and i have also been trying to remake the security kit so more people could run it. But i am having various problems. History...

Found something interesting today. Non of the mask roms tested so far are verifying ok. At first i thought it was just 1 of the co-processor roms, but they just won't record the same read each time. I am wondering if my programmer cannot read these masked roms properly, or if something happened...

Damn, sorry, i think i uploaded some mame screens by mistake .(when i was testing things out for comparison.) See here for the video of the memory test. Anything look out of the ordinary...

Ok, after some more power ons and off i managed to get it to run the memory test and the tgp test. Both pass ok, but then crash at the end if you try to exit. I am now wondering if the fighting vipers game i have here is only using 1 of the co-processors as the test only shows ic31, so maybe...

Thanks , yeah i've experimented with power and voltages. I confirmed the voltage at the filter board matches on various chips on the main board and also on a few rom sockets on the top board. I have adjusted power to exactly 5.05v at the board, but its doesnt solve it. Seems same from 4.85v...

Made some more changes to the power supply and leads and i can get the sound initialize screen pretty much every time now. Things have now changed to it i leave it off for awhile then it will boot to the legal page and then the first attract screen before crashing. If i press the test button...

So i made some progress but only very limited and 1 time the board booted to an attract screen but then crashed. There wasnt any 3d modelling going on though just the text. It does seem very very picky about the power supply used and the voltage level The process as checked in Mame is : 1) if...

Also 'model 2B cry' was a typo lol, but i think it fits pretty well so ill leave it... Hahahahah