On 6/24/2021 11:06 AM, Santo Nucifora wrote: > > > On Thu, Jun 24, 2021 at 11:54 AM Gerrit Heitsch > <gerrit_at_laosinh.s.bawue.de <mailto:gerrit_at_laosinh.s.bawue.de>> wrote: > > On 6/24/21 5:27 PM, Jim Brain wrote: > > > The little PCB I completely understand and it makes sense to me. > What > > I'm confused on is how the little 24 pin EPROM socket's lines > get under > > the ceramic packaging and back to the die... > > > The two Z8613 chips I posted a picture of are functionally equivalent > and are likely wired the same way. In the case of the ceramic package, > the pins from the EPROM socket go straight into the ceramic where it > must connect to a similar circuit as the mini-PCB version. You cannot > remove the socket or you will destroy the chip. > > Here are two close-up pictures of just under the EPROM socket if it helps: > > https://vintagecomputer.ca/wp-content/uploads/2021/06/Z8piggy1.jpg > <https://vintagecomputer.ca/wp-content/uploads/2021/06/Z8piggy1.jpg> > https://vintagecomputer.ca/wp-content/uploads/2021/06/Z8piggy2.jpg > <https://vintagecomputer.ca/wp-content/uploads/2021/06/Z8piggy2.jpg> > > Santo I'm hoping to find a non functional unit to tear down for posterity. I'll see if I can find any hits on the Z8613 IC. I did notice they looked almost identical in appearance, save the IC markings. Jim -- Jim Brain brain_at_jbrain.com www.jbrain.comReceived on 2021-06-24 21:02:54
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