24 Dec
2007
24 Dec
'07
11:35 a.m.
From: cclist at sydex.com
---snip---
This feature has a curious implication if you decide to replace an
older drive without the "block index until ready" logic with a newer
drive with that logic. Many controllers (such as the WD1770) or
software will count up a few sectors after select or motor on before
commencing an operation. The result is that everything still works,
but the latency after selecting a drive increases significantly.
The double density controller uses a serial chip. I don't expect to
use the controller once I manage to get the floppies archived. I
have a single density system runnning fine on my 8813 now. My
main issue is to get the data from the disk.
Dwight
Note that once the drive been selected and come ready, this is not an
issue.
For what it's worth,
Chuck
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