WTB: System 11 CPU Board

On 1 Feb 2006 10:43:06 -0800, "easternpinman" <mstoean.RemoveThis@hotmail.com> wrote:

>sys 11a will work in high speed
> I have prepared a full set of boards one month ago with a sys
>11a
>
>there is something with your roms
>the data of U4 from pinball.com is not working ( but this is
>speech or sounds )
> and there is a proto rom for U26 as 27128 available intsead of
> the 2764 U26
>anyway the sys11a will work with the 2764 U 26 also
>
>Marius
>www.pinball.ro


Marius,

I sent my eproms to a friend that has a High Speed.
He tried them in his game, they worked fine.
I don't think it is the eproms.

I don't understand why I have 3 11A boards that work ok with 11A or 11B games, but will not work with HS of GL eproms.
It appears that the only games that won't work, are games that use a 2764 in U26. I tried a 27128 with your proto image, it does not work.
I'm sure whatever it is, I am doing something stupid. (I am known for that)

Thanks
John
 >> Stay informed about: WTB: System 11 CPU Board 

John.


well it seems that you are in a vicious circle ,,, and the
failure is in front of your nose but you can not see it
,,,,,,,,,,,,,is kind of a Murphys laws effect,,,,,,,,,,,,,
I am having an odd failure also with a sys11b board on the
switch matrix the credit switch line ( + coin inputs ) not working
have changed everything LS245 pia 6821 resistor area and still
that line does not work ...............
In those cases I apply ... the following tehnique ... I leave that
alone at least 2 weeks to clear up my thoughts and ussually
after a period of time I fix the failure in a couple of
minutes ,,,is the " vicous circle " I was talking about upper


Marius

www.pinball.ro
 >> Stay informed about: WTB: System 11 CPU Board