Disk IO under SCO

[John Romkey]

In article <1049 at lakesys.UUCP> davef at lakesys.UUCP (Dave Fenske) writes:
>I'm not certain that I understand all of the rationale for the way in which
>SCO handles disk IO.  For example, they avoid DMA in favor of program control.

SCO avoids DMA because in the PC/AT architecture (and therefore the
ensuing 386 clones built out of it) DMA is SLOW and a processor string
instruction with a repeat prefix will improve performance tremendously
over what the DMA controller will get you.
			- john romkey
USENET/UUCP: romkey at asylum.sf.ca.us	Internet: romkey at ftp.com
"God is good, God is great, God's a big inverterbrate." - Boiled In Lead