Re: nibtools, GCR, G64

From: silverdr_at_wfmh.org.pl
Date: Sun, 2 Jun 2013 15:38:28 +0200
Message-Id: <70A78CF0-2CE1-4A0A-B099-FC929726842F@wfmh.org.pl>
On 2013-05-30, at 20:55, Pete Rittwage wrote:

>> So if I find a SYNC not being byte-aligned, I should expect that the
>> actual data (header or sector itself) won't be aligned either, right? If
>> that's the case then.. arrghh... %^#$
> 
> Definitely- all the data will be aligned to the sync,

Just to make sure - when a SYNC mark finishes, the first cleared bit is already /always/ data bit, right? Or at least it has to be or otherwise it will be an error anyway.

> so you have to shift everything in between the syncs...

Theoretically I could process it as bitstream, without preprocessing but I guess that would bring even more woes ;-)

> Also, you can't assume there is no "illegal" GCR which will throw off the framing.

How is it working on the hardware? Is it so that normally the drive CPU won't ever see any illegal GCR sequence, will it?

-- 
SD!


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Received on 2013-06-02 14:01:08

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