1943 CAPCOM Board 8751 security ic 7K

andrew96

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1943 CAPCOM Board Battle of Midway 8751 security ic 7K

Hi

does anyone have a eprom dump for the 8751 ic 7K?


I have a bootleg 1943 with no sound. It has a 8748 on a sub board along with a 7404 to invert things like the reset line to work with the 8748 in place of the 8751. GREAT I thought the 8748 does not have protection on it! but when trying to read it in the dataman 48LV it just shows the EA pin faulty and therefore can't read the eprom! and I am sure is why there is no sound! (if EA pin is not grounded properly inside then it won't read the eprom section)

so back to square one! needing a dump of the 8751, can anyone help with the code dump???

many thanks

Andrew
 
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I have just tried putting the 8748 into a fluke 9010-8048 pod, but this just proved the 8748 is bad as pod just will not reset with this chip in it!

So i seem to have a chip with the code in it that just wont work with the outside world!

I seem to be stuck! now in desperate need of the code!

Can anyone help?? please!

Andrew
 
There are no dumps for it in MAME... It's probably protected.
 
There are no dumps for it in MAME... It's probably protected.

thats exactly what i thought, but the 8748 has no protection built in where as the 8751 does!

so the bootleg 8748 'should' be readable with no problems, but the one i have has a bad EA pin so it is that i believe thats stopping it being read
 
I guess then I need another 1943 board thats a bootleg, that has a 8748 in place of the 8751 chip. think thats going to be a tall order!!

such a pity, I have just spent quite a few hours repairing the graphics on the board too and all for nothing!

this is the board I bought

http://www.andysarcade.net/store/index.php?act=viewProd&productId=1064

you can see the 8748 on the sub board in place of the 8751 on the right hand side of the board picture.
 
You would be better off buying an original board set.


thanks, but that is not really going to help me repair a boardset, indeed its going to work out a bit expensive if everytime i repair a board i have to buy a working one as well! and that still is not going to help in any way with the security chip issue! so how exactly will buying another board help me get the other one working?? i dont understand???
 
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