Yay, now I need some Osborne boot media!
cclist at sydex.com
Sun Nov 23 22:00:16 CST 2014
On 11/23/2014 06:53 PM, Fred Cisin wrote:
> On Sun, 23 Nov 2014, Jules Richardson wrote:
>> Some PCs will write SD, of course, although I think far fewer will write SD
>> and 128 byte sectors.
> The good news is that the Osborne single density was 256 bytes per sector.
> 10 sectors per track, single sided, 40 tracks
It's 128-byte MFM (not FM) that's the problem with a huge swath of PC
controllers. And, wouldn't you know it, there were a few systems using
The National Semi DP8473 is one of the controllers that can pull that
one off. Apparently they reverse-engineered the NEC 765 and didn't
reproduce the bug. Shame on them! Didn't they understand
"compatibility"? And yes, the same NS controller handles FM flawlessly.
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