1 Jan
2011
1 Jan
'11
12:36 a.m.
On 01/01/11 00:11, Geoff Oltmans wrote:
Isn't there also an issue of recording direction
of flippy discs
being opposite of expected? Or are disc controllers smart enough to
account for this? Seems like this would also affect interleave as
well as the per-sector data reversal.
Flip the data before writing it...
Writes are (generally) synchronised to the index pulse, so they'll end
up in the same place, plus or minus a small(ish) margin of error.
You're still going to have problems with head misalignment --
double-sided drives have the heads offset slightly relative to each
other (i.e. the tracks are offset). Flippies will have the tracks lined
up with each other, because they were written by the same head, just on
opposite sides of the disc.
--
Phil.
classiccmp at philpem.me.uk
http://www.philpem.me.uk/