25 Jul
2007
25 Jul
'07
9:16 p.m.
On 25 Jul 2007 at 20:43, dwight elvey wrote:
If you take the calculated crc with the recorded crc,
it can be
played backwards. When you get close, the end numbers in your
CRC back calculator will be zeros and the bits in the middle will
be the error mask.
I'd thought of that, but most of the error sectors have more than a a
single error (the content is mostly ASCII, so single bit errors are
easy to correct by inspection). Multiple MFM errors, what with bit
and clock/data phase shifting etc. just don't seem to be amenable to
that sort of approach. Maybe I'm missing something...
Cheers,
Chuck