Re: VIC-42

From: Jim Brain <brain_at_jbrain.com>
Date: Thu, 24 Jun 2021 13:17:27 -0500
Message-ID: <ef17ce65-449e-d1fc-2e5f-c197972b5659_at_jbrain.com>
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.com
Received on 2021-06-24 21:02:54

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