11 Sep
2008
11 Sep
'08
10:43 p.m.
Andrew Lynch wrote:
The intermediate disk signals could, *I believe* be
imported into a PC
parallel port with "clock out" (typically 500 KHz for MFM DSDD, 250KHz for
FM, etc) being used for latch signal. I think they are also slow enough to
be practically captured by the PC parallel port. The PC could then sample
the parallel port at high rate (interrupt driven? DMA?) to read the signals
and create a disk image from the data. Again, the i8272 would not process
the signals so they would contain all the data the i8272 processes but will
not pass along such as header info, IDAM, CRC, true gap length, etc.
The Disk2FDI project has already done this; give it a look to see if it
applies to your situation.
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/