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Re: On The Face + other all-in-one chip
On Mon, 9 Feb 1998, Udi Finkelstein wrote:
> >Again, my books may be wrong, but be aware that no-one makes 8-bit ISA
> >anymore (excepting on single-board computers sometimes), and that the EISA
> Well, I'm not sure all modem cards are 16 bit ISA. Why should they be?
>
> Udi
All modem cards are 8 bit ISA but all multi-port cards and voice-mail and
whatever, tend to be 16 because this halves the CPU overhead. If you have
simultaneous voice output and input on an 8-bit card you have something
like 16 k transactions/second at least. This looks small when compared to
the 2 M/sec limiting rate of ISA (at 8 MHz), but isn't quite because of
the task switching overhead in the CPU. Moving to 16 bit halves the rate.
Peter