Re: [Linux-decnet-user] What DEC machines actually ran DECnet?
Brought to you by:
chrissie_c,
ph3-der-loewe
|
From: Paul K. <pk...@eq...> - 2002-06-24 14:58:09
|
>>>>> "Henry" == Henry W Miller <hen...@at...> writes: Henry> ----- Original Message ----- From: "Paul Koning" Henry> <pk...@eq...> To: <dr...@wo...> Cc: Henry> <lin...@li...> Sent: Friday, June Henry> 21, 2002 11:12 Subject: Re: [Linux-decnet-user] What DEC Henry> machines actually ran DECnet? >> >>>>> "Gregg" == Gregg C Levine <dr...@wo...> writes: >> Gregg> Hello from Gregg C Levine writing for Jedi Knight Computers I Gregg> suppose I should have asked this question before, Gregg> but..... What DEC machines actually ran DECnet? >> 1. The PDP11, under RSX-11M, RSX-11S, RSX11-M+, P/OS, RSTS/E, >> RT11, or IAS. Not DOS, MUMPS, RSX-11D, Ultrix, or >> Micropower/Pascal as far as I know. Henry> Are you speaking about DEC's DOS as opposed to MS-DOS/PC-DOS? I meant DOS-11, the first operating system for the PDP11. Henry> DEC did introduce a DECnet-DOS in the late 1980's, which ran Henry> on a pre Windows PC under DOS with certain Ethernet cards or Henry> with a packet driver shim routine. All things considered, it Henry> ran pretty well. Good point, I forgot about that one. >> 2. VAX, under VMS, Ultrix, Digital Unix, or ELN. 3. DECsystem/20 >> (TOPS-20). 4. DECsystem/10 (TOPS-10) Henry> Both TOPS-10 and TOPS-20 utilized a PDP-11 front-end, Henry> connected to the KL-10 via a high speed connection called the Henry> DTE. The interface was referred to as the DTE-11 for the Henry> PDP-11 portion, and the DTE-10 or DTE-20 for the connection to Henry> the KL-10, depending on whether it was a DECsystem-10 or Henry> DECSYSTEM-20. Henry> The PDP-11 was usually a PDP-11/34 or a PDP-11/40. The KL Henry> could support up to three alternate front-ends; DTE0 being Henry> reserved for the connection to the main front-end, a PDP-11/40 Henry> running a modified version of RSX, called RSX-11/F. Henry> Each of the other three front-ends could also contain a number Henry> of terminal lines (usually DZ-11's or DH-11's), line printers Henry> (LP-11), card reader and card punch, as well as, obviously, Henry> synch line interfaces to other such front-ends. Henry> In addition, the front-end's on the DECsystem-10 could also Henry> run ANF-10, (Advanced Networking Protocol) which was developed Henry> as a stopgap until DECnet-10 became available, and was a Henry> powerful networking protocol in it's own right. Henry> The backend code for DECnet was built inside the TOPS-10 and Henry> TOPS-20 operating systems, and allowed the network to be used Henry> as almost any other device on the system or network. Not all 20s have the PDP11 front end; the 2020 (KS-20) does not as far as I know. I don't remember if DECnet on these machines used the PDP11 or not. If yes, then only for some cases, because Ethernet was a native device on the main system I/O bus, not connected via the PDP11. >> There are codepoints for PDP8 implementations but I don't think >> they actually existed. >> Henry> IIRC, DECnet-8 did exist, but it did not leave very much room Henry> in the system to do much else! It shouldn't be all that bad, after all the smallest RT11 and RSX-11S systems with DECnet support were about the same size as large PDP8s... paul |