Date   : Mon, 07 Feb 2005 01:53:27 +0000
From   : jgh@... (Jonathan Graham Harston)
Subject: Re: "Sideways" ROM

"A.Weston" <a.weston2@...> wrote:
> What is the perforated section to the left of the keyboard on a Model B
> for? I read it was something related to speech but what kind of upgrade
> is necessary to use it as of course the ROM slots are located to the
> right hand side of the motherboard?
 
It's for serially-accessed speach Phrase ROMs (PHROMs). Another
ribbon cable connects the keyboard PCB to the main PCB. PHROMs
could then be plugged into the "ashtray".
 
Very few people actually used the slot for this. Many people wired
up an external ROM socket there with a ribbon cable connecting to
one of the internal ROM sockets.
 
-- 
J.G.Harston - jgh@...                - mdfs.net/User/JGH
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