rfarris@serene.UUCP (Rick Farris) (02/01/90)
I have seen a number of discussions of how to best set up the Chips & Technology chipset for MS-DOS, but I don't remember seeing any discussion here. Would those of you that have 386s with the C&T chipset mind telling us about your extended set-up? Should shadow ram be enabled? Does page-interleaved mode work well with SCO Unix/XENIX? Are there any other important parameters? Rick Farris RF Engineering POB M Del Mar, CA 92014 voice (619) 259-6793 rfarris@serene.uu.net ...!uunet!serene!rfarris serene.UUCP 259-7757
steve@wattres.UUCP (Steve Watt) (02/02/90)
In article <1379@serene.UUCP> rfarris@serene.uu.net (Rick Farris) writes: > >Would those of you that have 386s with the C&T chipset mind telling >us about your extended set-up? > >Should shadow ram be enabled? Does page-interleaved mode work well >with SCO Unix/XENIX? Are there any other important parameters? > I have a Rose Hill 386/25 running SCO UNIX V/386 and Open Desktop. The most interesting configuration speedup was raising the DMA clock from SYSCLK/3 to SYSCLK/2. This DRAMATICALLY improved the floppy transfer rates. Interleaved mode works well. There is no way to get the RAM from shadowing back into general use, even with shadowing off, so I just leave it on (the memory test runs better than twice as fast, signifigant for an 8MB system). Otherwise, shadowing makes no difference, since SCO doesn't use the BIOSes at all. (They don't work in protected mode) -- Steve Watt ...!claris!wattres!steve wattres!steve@claris.com also works.
simon@ms.uky.edu (G. Simon Gales) (02/04/90)
Somone mentioned speeding up the DMA clock.... Well, I tried this on a
NEAT C&T 286 motherboard, and it does speed up floppy access. But some
high-density diskettes could not be read (under DOS). All disks which
I'd formatted to super-high capacity (1.5meg 5.25" disks) failed. Changing
the DMA clock back to normal fixed this. All of this is under DOS, haven't
tried it under Xenix/Unix yet...
--
Simon Gales@The University of Kentucky
simon@ms.uky.edu | 'Fate... protects fools, little children,
simon@UKMA.BITNET | and ships named Enterprise.'
{rutgers, uunet}!ukma!simon | - Riker, ST:TNG