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Re: I X-Rayed my Apple IIe

Grant Stockly wrote:
> > > > Any comments?Question for you ... what does a 4 layer board look like when it has
> > > been xray'd? Is it possible to see all 4 layers perhaps in different
> > > gray scales?
> > >
> > > Glenn
> >
> >   Both of those cards are 4 layer.  Traces on top and bottom, and the
> > power and ground on separate layers in the middle.
> >
> > Raymond
>
> On the boards I posted x-rays of?  Those are not 4 layer.  They only
> have a top and bottom copper layers.

  That's right.  I was thinking of the Mac 128K board when I said that.
 They even had a little 1-2-3-4 layout so you could see the layers.
The Apple /// Plus logic was a 4 layer board as well.  Had to do with
eliminating all those capacitor strips on the Apple ///.  

Raymond