Re: A newly working Commodore 720 - many questions...

From: MikeS <>
Date: Thu, 16 Feb 2012 13:17:40 -0500
Message-ID: <41B99EBAC2BA4C3D9DF287F282D2B7B9@vl420mt>
----- Original Message ----- 
From: "Ethan Dicks" <>

> On Thu, Feb 16, 2012 at 12:37 PM, Rob Clarke <>
> wrote:
>> Wow - so many options. I like the option of a single chip solution from
>> Gerrit as it doesn't require opening the PSU or attaching or hooking up
>> to
>> mains voltages. Incidently, the MAX machine used a 555 to generate the
>> TOD
>> signal, as Uz speculated.
> There used to be an 8-pin DIP that was commonly used in the 1970s for
> generating 60Hz using a 32768Hz watch crystal.
Well, there's the MM5369, although it uses a 3.58 MHz TV crystal like the
ELM part that Gerrit pointed to.

A lot of other unique and interesting ICs at Elm as well, albeit a little on
the pricey side (especially with shipping); thanks for the link, Gerrit.

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Received on 2012-02-16 19:00:08

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