I recently grabbed a few of these buggers: https://www.dropbox.com/s/jfx2za627x02fwo/R65001EAB3.jpg?dl=0 And I'm soon going to burn the Plotter1520 and Amiga Keyboard firmware into an EPROM and check if it's working... I just need to pick a few 2732 - it's been a long time I used such small EPROMs. :-) /Frank On 24.06.2021 18:06, 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> > > SantoReceived on 2021-07-12 20:00:09
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