1 Aug
2007
1 Aug
'07
11:29 p.m.
On 2 Aug 2007 at 1:09, Jim Leonard wrote:
Chuck Guzis wrote:
With the 765, jitter and intervening interrupts is immaterial. You
need the delay when issuing commands and reading status to ensure
that a *minimum" time has passed. If an interrupt intervenes, it's
immaterial, as you've satisfied the minimum delay criterion.
If you needed absolute precision, I suppose you could mask or disable
interrupts, but in the case of disk commands, it's not necessary.
Cheers,
Chuck
When I do my delay, I wait for the bit to flip
once, then again, then
again. Simple--even my old NT and 98 diskette device drivers worked
with it.
What about interrupt jitter? Or did you lock out certain interrupts
while you were measuring?