24 Jul
2006
24 Jul
'06
1:02 p.m.
Al Kossow wrote:
I've observed pulses in the 100-200ns range on an
PowerMac using a PCI
parallel port card and a three instruction bit twiddle. You need to remove
the filter caps on the I/O connector to use it at that speed.
I.e. the PCI bus has a higher bandwidth and is not as
artificially constrained as legacy ISA emulation. Yet,
it's still considerably slower than one *might* get
attaching an octal latch to, e.g., an SA1110's bus.
Is this true of most commercial machines? I.e. can
I count on at least a few tens of nanoseconds *minimum*
between writes? (or reads following writes, etc).
Thanks!
--don