test-drb November 2000

test-drb@ccmp.vtda.org

197 participants
507 discussions

by mark_k＠iname.com

Hi, The CorelSCSI package allows various SCSI devices, including WORM drives, to be used with PC-compatible (MS-DOS) and Mac computers Does anyone know what the most recent versions of CorelSCSI for the PC and/or Mac are? Any idea where I could get hold of a copy? -- Mark

25 years

Thicknet (was Re: BBS's)

by ajp166＠bellatlantic.net

From: Carlos Murillo <cem14(a)cornell.edu> >>don't have to listen to them. Why should me VAXes be interrupted by >>the constant chatter of WIN98? >>clint That was the reason for the introduction of vaxserver3100... >/etc/syslog.conf can be modified to avoid this. Fortunately, we're behind >a firewall. But having to acommodate idiotic NT needs sure sucks. REason, NT uses netbuei (netbios) as it's networking and if your running IP suite then it's netbios over IP. In the end it's netbios that wants to be pinged often. Makes for a lot of short packat traffic. Gets real nasty with more than about 30 systems on a net. Allison

25 years

Thicknet (was Re: BBS's)

by ajp166＠bellatlantic.net

.From: Tony Duell <ard(a)p850ug1.demon.co.uk> . >> I've only found one place where it's a problem so far, with an NE2000 card >> in a slow XT compatible the data rate (even at 10 Mbps) was too high for it DMA, a must and a lot of packet buffers (ramdisk). >I would be suprised if a PDP11 or PERQ or D-machine or... would manage >anything close to 100Mbps. In fact I know it won't. PDP-11 (q or unibus) will not. 100mb/S rate needs a minimum of 12.5mb second sustained transfer and burst rates slightly higher. None of the ISA-8/16 bit systems can. >Of course another issue is that some of these machines have built-in >ethernet interfaces (PERQs do, for example), and there's no way of adding >a 100Mbps card to them. Fortunately 10mb/s is still around for a while. >> Hubs and switches are getting cheap and small. An 8 port switch is about the > >What's the cost got to do with finding space for it, finding power for >it, or maintaining it? It's wall wart powered but software maintenance for them can be a pain. Not much bigger than a unmanaged hub. There is little value in switches until you get more than 4-5 systems that want to carry intense conversations concurrently. >> AUI tranciever in a junk bin, but I've never seen 10BaseT-coax converter the net at work uses a few of them, those are just baluns. Also the 10bt to AUIs are handy for boosting signal. They seem better at taking a noisy 10bt and pumping it on the backbone (thinnet) than a simple unmanaged hub. >Got a load of assorted transceivers for 10 p each recently (about 15 >cents to you...). They can be found cheap, used. Allison

25 years

Thicknet (was Re: BBS's)

by pete＠dunnington.u-net.com

On Nov 22, 9:14, Eric J. Korpela wrote: > They don't need to. Nothing stops machines from talking 10 Mbps over > 10baseT. That's what the 10 stands for. As long as you've got appropriate > hardware, they can commingicate with a 100 Mbps machine elsewhere on the net. > I've got 4 machines on the desk behind me on a 10 Mbps hub. The hub is > connected to the 100 Mbps switch that the machine on my desk is connected to. > I have no problems with my 100 Mbps full duplex machine talking to 10 Mbps > half duplex machines. I don't claim to know how the switch negotiates > rates and duplex. I just know that it does. It's done by a protocol involving exchange of patterns of link pulses when the link is first established. Full duplex and 100Mb capability are offered (separately, and there are a few devices that support full duplex 10Mb although it's not part of the standard) by one side of the link; if there's no approriate response from the other end, the link remains at 10Mb half-duplex (ie, normal 10baseT). > If you've got 10base2 nothing stops you from connecting it to a 100baseT > network through a repeating hub or switch. Well, strictly speaking, such dual-speed hubs are actually 2-segment repeaters that are very like simple switches (or a bridge). They buffer the data between the fast and slow segments, and on the cheaper ones that can reduce the performance significantly. > But at $80 a new 100 Mbp hub doesn't break the bank. (I also have never had > a hub or switch fail. Unless you only have a few, you've been lucky. I look after around a dozen serious switches and about 3 dozen hubs, and in the last four years we've had around half a dozen failures. Of course, one or two have been simple, like dead fans causing a hub to overheat, and we've had at least three instances of a single port failing. That's a lot fewer failures than we have on PCs, but then we have a lot more PCs! This is comparable to the rates seen by my colleagues across campus, incidentally. You should also bear in mind that ethernet is amazingly tolerant, and there can be intermittent failures, dropouts, links that fall back to half duplex etc which you won't notice unless your management system is fairly good. > On a related note, are there standards for wiring an RJ45 for phone use? > For localtalk? (I would assume that it would be possible to put both > in one.) There is, at least in the UK. I don't know if it would apply in the States, since you use two wires (one pair) for the phones and we use three (a pair and a half, but we normally also connect the fourth wire between nodes). Anyway, 10baseT and 100baseT use pins 1,2,3, and 6; the phones use 3,4,5, and 6; ISDN uses 3,4, 5 and 6 for data and carries power on the other two pairs. You normally plug a little white box containing a phone socket and PBX termination into the RJ45 wall socket. ISDN uses RJ45 plugs so nothing extra is required (unless it's a long run or multiple sockets and you need a terminator on the end). You can get little doublers that have one RJ45 plug on a short lead connected to a small box with two RJ45 sockets, wired in such a way that you can plug a 10[0]baseT into one side and a phone line into the other; connect the plug to a patch panel, and reverse the process at the other end (wall socket) to separate the signals again. They're meant for places where there's not enough "horizontal" wiring (the under-floor/overhead/behind-walls runs from patch panel/wiring closet to wall socket). You can also get ones that double up 2 x 10[0]baseT onto one cable, using all four pairs instead of two. > It would be nice to have the wired such that a misconnection > (ethernet into phone) won't fry anything. The phone won't be hurt by the net devices, but it's possible the net devices might be surprised by phone/ISDN voltages. However, as far as I know, we've never had a mishap (touch wood). > It would also be nice to sprinkle > RJ45 sockets around the house and decide what to use them for later. It's called "structured wiring", and that's what patch panels are for :-) All our ethernet, serial, ISDN, and POTS signals are carried on the same wiring and patch panels (except for the fibre, of course). We have about 800 RJ45 wall and floor sockets, not counting the patch panels, in our building for exactly that reason. I have about a couple of dozen at home, but I also have quite a few DB25s, BNCs, and phone sockets :-) -- Pete Peter Turnbull Network Manager Dept. of Computer Science University of York

25 years

MacOS 8.1 on an '030 (somewhat OT)

by rachael_＠gmx.net

>This is absolutely *disturbing*. >http://people.ne.mediaone.net/brochner/bornagain/showme.htm It`s running on a 040 there but I belive that there is a hack in one of the apple emulator for that amiga that would let you runne 8.1 on a 030. Regards Jacob Dahl Pind Public Pgp key available on request -------------------------------------------------- = IF this computer is with us now... = =...It must have been meant to come live with us.= = (Belldandy - Goddess First class) = --------------------------------------------------

25 years

Thicknet (was Re: BBS's)

by ethan_dicks＠yahoo.com

--- Gene Buckle <geneb(a)deltasoft.com> wrote: > I still have one of those huge H???? vampire tap ethernet trancievers that I > modified for 10Base2 that I can hook up to the DEQNA. > g. But does anyone out there use Thicknet at home? I have one vampire tap transceiver (and a bunch of 10Base2). I would love to set up a segment of 10Base5 just for the historical sake of it all. I suppose I would need at least one more 10Base5 transceiver to make it worthwhile. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Yahoo! Calendar - Get organized for the holidays! http://calendar.yahoo.com/

25 years

ISA prototyping boards at RSLC, was Re: intro and RML380Z

by dogas＠bellsouth.net

> What size and pad type do these board use? How big are the holes? How's > the provision for power distribution? How are the bus signals terminated? They were full sized ISAs, the boards are green and the holes were kinda small and lined up... ;) Plated through holes and no termination I think. I'll dig one up again for the catno. and specs you asked for this weekend > I've seen some boards I'd consider at the Radio Shack.com store here in > Denver, but I've never seen one in a regular RS store. They looked like closedout regular RS cat'd stock items of indeterminant age but still 'NIB' ;) - Mike: dogas(a)bellsouth.net

25 years

Rescue Needed: IBM System 36 in Central PA

by LFessen106＠aol.com

In a message dated Tue, 21 Nov 2000 12:56:24 PM Eastern Standard Time, James Willing <jimw(a)agora.rdrop.com> writes: << Please contact original message author (shown below) if you have rescue this one. -jim ---------- Forwarded message ---------- Date: Mon, 20 Nov 2000 12:05:18 -0500 From: Nathan Lauver <nlauver(a)acsworld.net> To: jimw(a)computergarage.org Jim, My company is in posession of an IBM System/36, most of the docs, lots of software, the line printer, two terminals, and an ISA-based emu card for a pc. I can't find anyone to buy it, and it's getting cold. It's in a pavillion-like storage area outside. I talked to the powers that be, and said if I can even just get it out of our way, they'd be happy. Would you be interested in picking it up, or having it shipped? We're located in Central PA. -Nathan >> Just how big is this? I am located outside Allentown (Eastern PA). And where exactly are you located? -Linc Fessenden http://members.aol.com/lfessen106

25 years

TCP/IP on eightbitters

by rachael_＠gmx.net

There is a tcp/ip stack for Amstrad CPC called cpc/ip last time I looked at it only ran at 6128. Regards Jacob Dahl Pind Public Pgp key available on request -------------------------------------------------- = IF this computer is with us now... = =...It must have been meant to come live with us.= = (Belldandy - Goddess First class) = --------------------------------------------------

25 years

Two Convergent Technology UNIX server free for UK collection

by kevin＠xpuppy.freeserve.co.uk

I have a pair of Convergent Technology servers, a 640 and 220. Both running CTIX and in apparently working order. Some manuals and installation tapes, including MicroFocus Cobol (you deal with licening issues!). Free to good home, but need to be collected from near Guildford. Happy to answer any questions as best as I can. They were given to me whilst collecting another machine. Kevin Murrell kevin(a)xpuppy.freeserve.co.uk

25 years

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test-drb November 2000