Path: utzoo!attcan!uunet!lll-winken!lll-tis!ames!pasteur!ucbvax!NIHCU.BITNET!RAF
From: RAF@NIHCU.BITNET (Roger Fajman)
Newsgroups: comp.protocols.tcp-ip.ibmpc
Subject: Re:  DMA usage with network I/O
Message-ID: <8805152142.aa05116@Louie.UDEL.EDU>
Date: 16 May 88 01:21:09 GMT
Sender: daemon@ucbvax.BERKELEY.EDU
Organization: The Internet
Lines: 6

> Given this architecture, DMA only brings a benefit when it is faster than
> string I/O (which is true in 8088-based machines).

In a machine like a Compaq 386/20 the CPU runs at 20 MHz while the
bus runs at 8 MHz, as in an AT.  Thus it seems to me that the CPU
might be able to find something else to do while the DMA transfer is
going on.  Can anyone tell me if that is true or not?