12 May
2012
12 May
'12
12:54 a.m.
On 12 May 2012 at 9:30, Jochen Kunz wrote:
Sorry for my stupidity. I am almost ignorant to floppy
format details.
What is the problem with single density? Is a PeeCee floppy controler
unable to write this format?
Some can, some can't. Some can only read single density (FM); some
can neither read nor write FM. It all depends on the chip (or
combination thereof) used.
Oddly, later systems with SMSC "SuperIO" chips have better luck with
this.
I remember complaining to Intel that the 82077AA-1 stepping
completely broke FM writing (and some reading). They said that FM
wasn't important enough to deal with then--or in the future.
If you have an old PC system with a National Semi 8473 or 8473,
you've got the best of the lot. WD37C65 controllers are also okay.
Hope this helps,
--Chuck