On Tue, 14 Sep 1999 morrison(a)t-iii.com wrote:
The real problem was that the DD controller could only
write two types of
data marks, whereas the SD one could write four.
Randy Cook chose the two the DD controller couldn't write for the Mod I SD
O/S.
That was only part of it though an important one. Still you can't read DD
with a SD chip. And it was the SD chip 1771 that could write all sorts of
bizzare formats.
Allison