Re: cbm 8032 motherboard + 4164

From: Ethan Dicks <>
Date: Thu, 6 Oct 2016 17:25:17 -0400
Message-ID: <>
On Thu, Oct 6, 2016 at 4:08 PM, didier derny <> wrote:
> I tried the following thing:
> removed -5v
> removed +12v and send 5v on +12v
> removed 4116
> installed sockets
> installed 4164
> works!!!


> just need to restore +9v unregulated  (apparently only used or tape motor)

Right (I do happen to use my tape drive - I was reading tapes last night)

> IEEE-488 still not working  (pia cold, look strange)

I have substituted a 6821 for the 6520 PIA and it seems to work fine.
The 6821 is not hard to find (especially at my house since I worked
for a place that had a product that included a 6821 and I got all the
old stock when they closed).

> everything is reversible... (no definitive modifications)

Even better.



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Received on 2016-10-06 22:00:02

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