6 Oct
2009
6 Oct
'09
10:24 a.m.
On 6 Oct 2009 at 17:54, Philip Pemberton wrote:
If you wanted to write back to the drive, you'd
need to handle
precompensation, which would involve increasing the clock rate (the
ST412 and ST506 precompensation value is 12ns according to the OEM
Manual). Unless, that is, you were trying to build a Write-Only
Memory... :)
I'd recommend one of the common fixed-point DSPs. Many of these have
one or two serial channels that can run at very high rates and
feature DMA into large memory spaces.
To keep costs low and development simple, I'd probably use a separate
uC for handling the control signals.
Floppy emulation can go with a simple uC, but fixed disks run at
least 10x faster, even though the amount of data per track is roughly
the same as a 1.44MB floppy.
--Chuck