2 Mar
2008
2 Mar
'08
11:52 a.m.
On Mar 1, 2008, at 10:39 AM, dwight elvey wrote:
Why not just build that bus interface and put a floppy controller
chip (WD2797, 765, etc) on the other side of it? I suppose the DSP
chip would give you much greater flexibility in terms of being able to
download new code into it to support different formats (even different
types of modulation), but it's much more complex.
Hmm. Now that I think about it, a DSP-based floppy controller would
be amazingly flexible. Wow..
-Dave
--
Dave McGuire
Port Charlotte, FL
How about a
PCI floppy controller board? Maybe with some supplementary
logic to allow raw track reads? Possibly a BIOS to boot from? An
external
floppy drive connector?
Just wondering how complicated such a thing would be. Thanks!
It would be relatively easy if you did most of the work in a DSP chip.
For the floppy end, you need a parallel port to read status and
write controls.
For reading raw data, a 7474 flipflop, an adjustable clock
and a DSP chip, such as a ADSP2118 or similar.
Then you'd need a bus interface to the PCI bus.