Intel DD format differences

From: Steve Thatcher <>
Date: Tue Feb 22 13:51:20 2005

I referred to the 1793 technical spec that outlined what the 3740 and system 34 formats are. Those manuals are also out on bitsavers under Western Digital. I saw no reference to PLO sync bytes or the special gap bytes in the SD format.

-----Original Message-----
From: Eric Smith <>
Sent: Feb 22, 2005 10:29 AM
To: Steve Thatcher <>,
        "General Discussion: On-Topic and Off-Topic Posts" <>
Subject: Re: Intel DD format differences

Steve Thatcher writes about Intel double density (M2FM) disk format:
> Eric, the gap and PLO sync bytes are in the DD system 34 format. They are
> not in the 3740 format that I was talking about.

What's documented in the Intel manuals doesn't match the docs I have
for either 3740 or System 34 DD format. Maybe I'm missing something.

Received on Tue Feb 22 2005 - 13:51:20 GMT

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