9 Apr
2007
9 Apr
'07
7:08 p.m.
On 10 Apr 2007 at 0:13, Philip Pemberton wrote:
I've got the first stage of my floppy disc
reader working! Meaning, the
data separator and synchroniser works - I have a circuit that outputs a pulse
whenever the MFM 'magic sync sequence' (0x4489) is detected. In theory, I can
use that to sync the reader against sector boundaries on IBM-format discs, or
track boundaries on Amiga discs.
Philip, it sounds like an interesting project. However, I've got an
itch in my brain that I can't seem to scratch. If you're doing bit
transition timings, why even bother to have an AM detector or data
separator? You can do all of that in software. Are you restricting
your design to MFM and FM encodings?
IWhat am I missing here?
Cheers,
Chuck