rcd@ico.ISC.COM (Dick Dunn) (09/22/88)
John Plocher was following along the 286 virtual memory and virtual/real bug discussion when he said: > This is really moot, tho, because the 386 has none of these problems [but > it has a few of its own], and a 386 box onow costs the same as a 286 system > did a year ago... Sure, but that doesn't mean it costs as much as a 286 box today. More to the point, a 386 box costs a lot of money and I already have a 286 box, so the 386 isn't of any help. [This is me personally, not me as part of ISC!] I hope Microport isn't planning to leave 286 users out in the cold just because the 386 is in vogue...there are a lot of 286 boxen out there (aren't there? I hope?! hello?) which want a good UNIX. Saying, "Hey, just change the memory (and add some more) and change the processor/motherboard" isn't a useful response. I want to upgrade software (from 2.2.0!), not hardware. Of course, if somebody wants to trade me even, 286 for 386 motherboard, I'm listening! -- Dick Dunn UUCP: {ncar,nbires}!ico!rcd (303)449-2870 ...Worst-case analysis must never begin with "No one would ever want..."
hedrick@athos.rutgers.edu (Charles Hedrick) (09/22/88)
The whole discussion about doing VM on the 286 may have been misleading. The fact is, it isn't entirely Microport's decision. They just do device drivers and various details for what is basically an ATT/Intel product, System V/286. I don't think Microport has the resources to do their own 286 port of System V from scratch. If I'm right, we won't have VM on the 286 until ATT and Intel decide to produce a 286 port of SVr3 or SVr4. I've not seen any evidence that they are interested in doing that. ATT seems to be concentrating on putting new features into SVr4, and on getting the 386 port right. They aren't even doing VAX ports anymore. So I find it hard to believe that they're going to do a new 286 port. We can reasonably expect Microport to fix the various problems with SV/AT, including serial line performance, floating point, give us support for newer disks, and do various other neat new things. But I'd be very surprised to see them do a basic new kernel. Happily surprised you understand, but surprised.
jfh@rpp386.Dallas.TX.US (The Beach Bum) (09/23/88)
In article <Sep.22.04.57.32.1988.5403@athos.rutgers.edu> hedrick@athos.rutgers.edu (Charles Hedrick) writes: >The whole discussion about doing VM on the 286 may have been >misleading. The fact is, it isn't entirely Microport's decision. >They just do device drivers and various details for what is basically >an ATT/Intel product, System V/286. I don't think Microport has the >resources to do their own 286 port of System V from scratch. uPort probably couldn't do a port from 3B2 sources to PC/AT on their own, but there is little reason they can't hack in some support for "segment swapping". the fact is, the number of routines inside the kernel which are affected by paged out segments is probably very small. trap.c is probably the most affected, followed by various members of sys[1234].c and three or four others. virtual memory for any system which can support it is hard, but far from beyond the reach of a company the size of uPort. -- John F. Haugh II (jfh@rpp386.Dallas.TX.US) HASA, "S" Division "Why waste negative entropy on comments, when you could use the same entropy to create bugs instead?" -- Steve Elias
jack@swlabs.UUCP (Jack Bonn) (09/23/88)
In article <9695@ico.ISC.COM> rcd@ico.ISC.COM (Dick Dunn) writes: >Sure, but that doesn't mean it costs as much as a 286 box today. More to >the point, a 386 box costs a lot of money and I already have a 286 box, so >the 386 isn't of any help. [This is me personally, not me as part of ISC!] What ever happened to the 386 that would plug into a 286 socket? I remember seeing a description of it in the literature, yet the 386SX seems to have none of the qualities of the 80288 as it was called. Is there another chip waiting in the wings (or has its wings been clipped)? I suppose that a daughter board would probably do the trick, but my guess it would cost as much as a 80386 mother board. Any further info? -- Jack Bonn, <> Software Labs, Ltd, Box 451, Easton CT 06612 uunet!swlabs!jack (UUCP) jack%swlabs.uucp@uunet.uu.net (INTERNET)
mann@intacc.uucp (Jeff Mann) (09/24/88)
In article <9695@ico.ISC.COM> rcd@ico.ISC.COM (Dick Dunn) writes: >I hope Microport isn't planning to leave 286 users out in the cold just >because the 386 is in vogue...there are a lot of 286 boxen out there >(aren't there? I hope?! hello?) which want a good UNIX. Saying, "Hey, just Yeah! My uport286 system is pretty good, for what it is, now that 2.3 has reduced the almost daily serial port panics, and I figured out how to use getty with 8n1. But it is a pretty insular universe. I wanna run MS-word! Is that too much to ask, without having to get some kind of klunky dosmerge (if there even is one that works)?? Are there any decent applications I can run? I have spent the last year writing code on it, but I can't do everything! I called our dealer to ask how to connect into an appletalk network, he said: "there is NO support for ANY kind of networking with V/AT!" What kind of UNIX can't do networking??? The only thing I can think of is to use the KA9Q tcp/ip package over the serial port, that's really gonna please my MS-Word users! I want a tape backup. I'm *real* sick of swapping 50+ floppies around, but I sure as hell can't afford $2000.00 (Canadian) for the ONLY drive supported. That's more than my whole system is worth! And what about SCSI?????? Well, that's what I want, but I don't think I'll get it. I doubt that the sales volume is there to justify all that work, especially if there is a generic merged V/386 coming up soon which will support lotsa 3rd party applications, networking, and devices. So I guess Microport can't really be blamed for leaving us "out in the cold". Brrrrrrrrr........ wanna buy a used AT? -- | Jeff Mann - Inter/Access, Toronto ...uunet!mnetor!intacc!mann | | "A picture is worth 256 thousand words" {utzoo, utgpu}!chp!intacc!mann |
sjb@dalek.UUCP (Seth J. Bradley) (09/24/88)
In article <2577@swlabs.UUCP> jack@swlabs.UUCP (Jack Bonn) writes: >In article <9695@ico.ISC.COM> rcd@ico.ISC.COM (Dick Dunn) writes: >What ever happened to the 386 that would plug into a 286 socket? I remember >seeing a description of it in the literature, yet the 386SX seems to have >none of the qualities of the 80288 as it was called. Is there another chip >waiting in the wings (or has its wings been clipped)? I suppose that a >daughter board would probably do the trick, but my guess it would cost as >much as a 80386 mother board. Any further info? The 386SX is available, but as yet is in short supply. While it is compatible with the 286 architecture, it does require a few logic chips to interface it to the bus. My guess is you'll see boards with a 386SX (with a socket for a 387SX) and a few logic chips that will pug into a short slot just for power. A cable will then connect this board to the 286 socket on the motherboard. I'm not making any guarantees, but this arangement should cost much less than a 386 adapter board or motherboard. The disadvantages are you are stuck with a 16 bit data path and the processor will run no faster than your system clock. But if you are running UNIX, you can upgrade to the 386 version which will run 2-3 times faster even at the same clock speed! -- Seth J. Bradley UUCP: uunet!lll-winken!dalek!sjb Internet: lll-winken.llnl.gov!dalek!sjb
davidsen@steinmetz.ge.com (William E. Davidsen Jr) (09/27/88)
In article <2577@swlabs.UUCP> jack@swlabs.UUCP (Jack Bonn) writes: | What ever happened to the 386 that would plug into a 286 socket? I remember | seeing a description of it in the literature, yet the 386SX seems to have | none of the qualities of the 80288 as it was called. Is there another chip | waiting in the wings (or has its wings been clipped)? I suppose that a | daughter board would probably do the trick, but my guess it would cost as | much as a 80386 mother board. Any further info? I believe that a duaghter board will be in the $200-400 range, with a socket for the 80387. My rumor factory says that the 386SX has the same problems with a 287 as the regular 386, and that use of the 387 will be suggested for systems being used in protected mode. How about some info, vendors? -- bill davidsen (wedu@ge-crd.arpa) {uunet | philabs}!steinmetz!crdos1!davidsen "Stupidity, like virtue, is its own reward" -me
neighorn@qiclab.UUCP (Steve Neighorn) (10/02/88)
In article <1988Sep23.152733.6249@intacc.uucp> mann@intacc.UUCP (Jeff Mann) writes: > >I want a tape backup. I'm *real* sick of swapping 50+ floppies around, but >I sure as hell can't afford $2000.00 (Canadian) for the ONLY drive supported. >That's more than my whole system is worth! And what about SCSI?????? We are all sick of 50+ floppies, which is why lots of people have tape drives. Microport sells an Everex tape driver package for $100. You purchase this package, get a Wangtek 60meg tape drive, an Everex EVA831 tape controller card, and a cable. Total cost from mailorder houses, about $500 for the hardware. So for $600 total, you can have an external tape drive. Power can be run from the inside of the box via an extender power cable. This is the cheap route. You could also get a complete Everex tape drive system which includes all of the above hard- ware in a nice box with a power supply for about $850. I don't know the exact exchange rate between US and Canadian dollars, but I doubt it is 3:1. Good luck with your backup quest. -- Steven C. Neighorn !tektronix!{psu-cs,reed,ogcvax}!qiclab!neighorn Intel Corporation "Where we BUILD the Star Fighters that defend the Development Tools Operation frontier against Xur and the Ko-dan Armada" 80960 Language Group work: (503) 696-7264 / home: (503) 645-7015