Re: PET 3032 alive :)

From: Francesco Messineo <>
Date: Thu, 2 Feb 2017 16:03:49 +0100
Message-ID: <>
Looking at the datasheet, it appears that pin25 of the 6821 is called
E (enable) and on 6820 is the familiar phi2 or pih0. Timings look
compatible (but I didn't quite read all the datasheets), so I might
give it a try and see what I get.

On Thu, Feb 2, 2017 at 3:58 PM, Gerrit Heitsch
<> wrote:
> On 02/02/2017 03:18 PM, Francesco Messineo wrote:
>> I've spoken too soon :(
>> Swapping the 6520s gives no cursor and no keyboard input, so I think I
>> have to find a spare PIA (or design my own PLD version, if I want to
>> spend some months of spare time doing it).
>> Does anyone have a 6520 I can buy?
> I read somewhere that you can also use an 6821, but I'm not 100% sure. Can
> anyone confirm or deny it? And if deny, what are the differences?
>  Gerrit
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Received on 2017-02-02 16:00:08

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