Namco assault no tanks

[John Bennett]

Trust me, if every object mask ROM was dead, you'd know about it as 90% of the PCB would've died too due (it's the sort of thing that happens if someone reverse polarities or overvoltages the board).
Where you getting 3.6V from? Everything's 5V.

 

[Retroman839]

My programmer / burner
It’s a gx - 4x4

I can’t read these sharp 28 dip chips ..

I get a message about swap dip to allow for 3.6v

Which is why I cannot read the object roms .

 

[Georgian2]

is the OBJ4 missing or you took it out to read? My bet is on the CUS146

 

[John Bennett]

Ah, ignore that. If you want to read them you set it to whatever 27c thingy TheDaddy said and make an adaptor.

 

[Georgian2]

My programmer / burner
It’s a gx - 4x4

I can’t read these sharp 28 dip chips ..

I get a message about swap dip to allow for 3.6v
View attachment 35836
Which is why I cannot read the object roms .

What is LHF00L30? No such memory chip on assault.

 

[Retroman839]

is the OBJ4 missing or you took it out to read? My bet is on the CUS146

Just taken it out to try to read I was going to check em all ..

If you got a 146 ?🙏😉

 

[Georgian2]

Just taken it out to try to read I was going to check em all ..

If you got a 146 ?🙏😉

Better if I send you the whole final lap video PCB? not the same like assault but almost same customs.

 

[John Bennett]

Yeah, 146 is on both. Surface mount though.

 

[Retroman839]

Better if I send you the whole final lap video PCB? not the same like assault but almost same customs.

Makes sense

 

[Retroman839]

Yeah, 146 is on both. Surface mount though.

I have desolder tool.

Would me removing the 146 my end prove it is the fault ?
As in no change with it off the board ?

 

[John Bennett]

Nah, I wouldn't do that, you'll just get no sprites whatsoever

 

[Retroman839]

Georgian is sending me a spare
Video board from a final lap ..

Cus 146 plus other ..
Will start with cus 146

 

[John Bennett]

I am happy to look at it for a bottle of wine and p&p if needed. I think an oscilloscope on various parts of the OBJ circuit is a better place to start than shotgunning an SMT IC.
Granted, it’s a chip that does fail, but there could be other things.

 

[Retroman839]

I am happy to look at it for a bottle of wine and p&p if needed. I think an oscilloscope on various parts of the OBJ circuit is a better place to start than shotgunning an SMT IC.
Granted, it’s a chip that does fail, but there could be other things.

I’m happy to do that mate 👍

Do you like white wine ?
It’s just that .. my
Missus is from the Riax baxias
Galicia .. famous for Albariño

Perfect with pescados /
Mariscos
If fish / molluscs is on your repertoire of mortal delights ,
I bring a few back each year ..
Might have one in the stores .
❤️👍…

I will wait for Georgians final lap to arrive and include in package 👍. Thx

Pm me your adres & PayPal details 😉🙌

 

[John Bennett]

Oh look, sprites:

 

[John Bennett]

Now I was all set with my schematics and posho scope.
The first chip I decided to probe was the RAM connected to the CUS146.
However it was in the socket backwards, so I didn't bother. There were about 5 RAM chips in backwards on the video board.




See that bloody great big 'T' ?

Anyway, seems none of them were damaged enough to stop it working when put in properly, so I claim my bottle of wine.

edit: Lucky anyway, seeing the pinout - putting them backwards will reverse the polarity of the power pins which should theoretically exceed he -0.5V limit and trash the chips. At least there's some spares on that Final Lap PCB you could rob if they go in future.

 

[Wahoobies]

Love this game. One of my favorite later cabinets too

 

[Retroman839]

Thank you John ,

Bottles of wine is on its way 😁👍😘😉

I had them rams out and shuffled them around several times .. … And the big T is
Unmissable for quick glacé to make sure chips in correctly.

But I was going through an eye unjury at the time but don’t recall it flipping things upside down ? ‘ Scratchin my head ‘

What ! 😆😆😆🙌🍻

Really ! Nah ……
Literally can’t believe that ..



( but I do believe it 🙃
Where is my head at ?

Delighted it’s well and living
Cheers 👍..
I’ll get you tipple in the post 👍
Super confused too as I would have had em in correctly at some point surly to god !

 

[Retroman839]

Custom panel project is afoot 🥳☺️

 

[Georgian2]

So what was the fault here? Only the 2 rams in backwards?