Date   : Mon, 18 Oct 2010 08:37:38 +0100
From   : mike@... (Mike Tomlinson)
Subject: 8MHz and 2MHz clocks on BBC Model B

In article <AANLkTimOfRC4iKUg7Qfqa2dvtXOq2F2QobjKtt-
j84Z3@...>, James McGill <plexer@...> writes
>Hi all,
>
>I'm trying to determine what the purpose of IC30 (74LS74) on the Model
>B is. My best guess is that it should delay the 2MHz clock by 1/2 a
>cycle (250nS),

I've only glanced at the diagram, but my first thought is that it has
something to do with slowing the system clocks down for 1MHz bus access.

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