kcsmith@utcsri.UUCP (K.C. Smith) (03/28/85)
*** REPLACE THIS MESS WITH YOUR LINEAGE ***
We are considering the purchase of a PC/AT for a small number of users.
I understand a restriction of Xenix exists which limits the number of
simultaneous users to three. Is this real?
Please mail replies to:
Prof. K.C. Smith
{cornell,ihnp4,allegra,uw-beaver,decvax!utzoo}!utcsri!kcsmith
CSNET: kcsmith@toronto ARPA: kcsmith%Toronto@CSNet-Relaylauren@vortex.UUCP (Lauren Weinstein) (03/30/85)
Whether there is a software restriction is a matter on which I cannot comment (I don't know) but given that "officially" the AT only supports 2 serial ports plus the main console, one reason for a limit of "3" is clear. --Lauren--
jbn@wdl1.UUCP (04/03/85)
Does Xenix on the AT run in 286 native mode or in 8086 emulation? In other words, is the memory protection hardware being used? If not, is there an AT UNIX port that uses the machine properly? John Nagle
beth@gymble.UUCP (Beth Katz) (04/08/85)
> Does Xenix on the AT run in 286 native mode or in 8086 emulation? >In other words, is the memory protection hardware being used? If not, >is there an AT UNIX port that uses the machine properly? > > John Nagle I believe Xenix on the AT is running in 286 native mode. When I boot the system, it says "XENIX 286 boot". Of course, that is just from my memory from when I used it. Beth Katz
clewis@mnetor.UUCP (Chris Lewis) (04/10/85)
In article <135@gymble.UUCP> beth@gymble.UUCP (Beth Katz) writes: >> Does Xenix on the AT run in 286 native mode or in 8086 emulation? >>In other words, is the memory protection hardware being used? If not, >>is there an AT UNIX port that uses the machine properly? >> >> John Nagle > >I believe Xenix on the AT is running in 286 native mode. When I boot >the system, it says "XENIX 286 boot". Of course, that is just from >my memory from when I used it. > Beth Katz Yes indeedy, XENIX on an AT runs in 286 native mode. You do get memory management/protection. PC/IX on an AT runs in 8086 emulation mode and has no memory management/protection (just like on an XT). -- Chris Lewis, Motorola New Enterprises UUCP: {allegra, linus, ihnp4}!utzoo!utcs!mnetor!clewis BELL: (416)-475-1300 ext. 321
jbn@wdl1.UUCP (04/16/85)
Yes, indeed, Xenix on the AT runs in protected mode. As Dr. Dobbs's Journal says ``throw away your hand-coded screen management routines''. Applications aren't allowed to mess with the hardware or screen memory. Graphics? What graphics? This is UNIX. You can position the cursor by sending escape sequences, and that's about it. John Nagle
root@wlcrjs.UUCP (Randy Suess) (04/19/85)
In article <373@wdl1.UUCP> jbn@wdl1.UUCP writes: > > Yes, indeed, Xenix on the AT runs in protected mode. As Dr. Dobbs's >Journal says ``throw away your hand-coded screen management routines''. >Applications aren't allowed to mess with the hardware or screen memory. >Graphics? What graphics? This is UNIX. You can position the cursor >by sending escape sequences, and that's about it. > Funny.. The AT&T 7300 has pretty decent graphics for cursor addressing! Also, plot, and a bunch of other graphics routines on my Venix system do pretty good, and not a "ESC=rc" in the bunch.. -- .. that's the biz, sweetheart .. Randy Suess Chi-Net - Public Access UN*X (312) 545 7535 (h) (312) 283 0559 (system) {ihnp4|ihldt}!wlcrjs!randy