10 Jan
2010
10 Jan
'10
7:02 p.m.
---snip---
My best guess is that the LSI contains a flip-flop that's cleared when
STEP transitions H->L, and cleared when it transitions L->H. The FF
output is then used as an enable signal for the RD_DATA and INDEX drivers.
As I've said before: "It works now, or at least seems to."
Hi
This is normal behavour for the newer drives that don't have a DskRdy
signal.
The way they indicate not ready is to turn off both the data and the
index signals. I think this works from seeing the disk spin but I don't
recall exactly how this works.
I've cross wired the index to the dskrdy for some of the older machines
and that seems to work but you do need to check to see if it uses
active or passive loading.
Dwight
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