TUHS

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6420 discussions

by Robin Birch

This is rather off topic I know but the people in this group stand a good chance of being able to help, so apologies. Now, I am struggling with the sums involved in Reed Solomon encoding/decoding. Can anyone walk me through a couple of worked examples? Cheers Robin -- Robin Birch

21 years, 2 months

[pups] Any SMP PDP11 platforms?

by Warren Toomey

Hi all, I stumbled across this reference to a 1975 Masters thesis: de Brito Meyer. W., and Hawley, J.A.. III. Munix. a multiprocessor version of UNIX. Master's thesis, Naval Postgraduate School, Monterey, Calif.. 1975. Description of dual processor Unix. Can anybody tell me what PDP11 platforms around 1975 had multi-CPU capability? Also, if anybody has further information about Munix, please let me know! Thanks in advance for any help. I've trawled thru the Unix Archive with no results. Cheers, Warren

21 years, 2 months

Anybody with a copy of this paper?

by Warren Toomey

Hi all, would anybody have a copy of this paper: Multiprocessor UNIX operating systems. Bach, M.J., and Buroff. S.J. Bell Systems. Tech. J. 63. 8 (Oct. 1984) 1733-1749. If so, would you be able to scan it in and e-mail it to me, or even photocopy it and post it to me? I'll reimburse you for time & postage. Thanks in advance, Warren

21 years, 2 months

[pups] UC08 and Ultrix-3.1

by nao

Hi, all. I finally discarded my RD54 haunted by frustrating retries and burnt my yen on an Emulex UC08 board. I installed it to my PDP-11/53 and attached an old DDS2 drive and a 230MB MO drive. Now 2.11BSD runs as smooth as silk. Next I tried to install Ultrix-3.1, but I entered an unexpected weirdness. After entering setup phase 1, the initial setup aborted saying that it failed to access files under /usr. Some lengthy investigation revealed that UC08's emulation confuses Ultrix. The MO drive pretends an RD54 and the installer is quite confident of it. Once the kernel is in service, it checks the controller board and identifies it as a KDA50, which is connected to RAxx drives. Now the kernel treat the MO disk as a RAxx. Since RD54 and RAxx have different partition layout, kernel failes to find /usr filesystem and the installation process fails. To avoid this gap, I put a 540MB drive (bigger than an RA81, which is about 469MB) and configured it to behave as an RA81. The installation process now goes. After carefully studying src/sys/conf/dksizes.c, I also used a 230MB MO disk as an undersized RA81 and it seems to work well. I also tried SIMH. This time an emulated RD54 worked well, but a tape drive suddenly stopped during installation. I traced TMSCP protocol log and found a bug in the tape driver of Ultrix standalone installer, which hitted hidden incompatibility of SIMH. Here is an ad hoc patch for SIMH: --- simh.orig/PDP11/pdp11_tq.c Mon May 19 20:24:04 2003 +++ simh/PDP11/pdp11_tq.c Thu Nov 20 18:32:43 2003 @@ -260,7 +260,7 @@ CMF_SEQ|CMF_RW|MD_CDL|MD_CSE|MD_REV| /* compare */ MD_SCH|MD_SEC|MD_SER, CMF_SEQ|CMF_RW|MD_CDL|MD_CSE|MD_REV|MD_CMP| /* read */ - MD_SCH|MD_SEC|MD_SER, + MD_SCH|MD_SEC|MD_SER|MD_RWD, CMF_SEQ|CMF_RW|CMF_WR|MD_CDL|MD_CSE|MD_IMM| /* write */ MD_CMP|MD_ERW|MD_SEC|MD_SER, 0, /* 35 */ But of course you want to fix Ultrix, don't you? Another patch is here, but it is untested: --- src/sys/sas/tk.c- Sun Jan 24 06:24:58 1988 +++ src/sys/sas/tk.c Fri Nov 21 22:14:15 2003 @@ -247,6 +247,7 @@ op = M_O_READ; else op = M_O_WRITE; + tk.tk_cmd[0].m_modifier = 0; if((mp = tkcmd(op)) == 0) { printf("\n%s magtape error: ", tk_dct); printf("endcode=%o flags=%o status=%o\n", @@ -324,6 +325,7 @@ sizeof(struct tmscp) - sizeof(struct tmscp_header); tk.tk_cmd[0].m_header.tk_vcid = 1; tk.tk_cmd[0].m_cntflgs = 0; + tk.tk_cmd[0].m_modifier = 0; /* need to set the density if TU81 */ if (tkcmd(M_O_STCON) == 0) { printf("\n%s STCON FAILED: can't init controller", tk_dct); Ultrix seems unnecessarily square and not an OS of my type, but a fairly good testbed for emulated software and hardware :-) Naoki Hamada nao(a)tom-yam.or.jp

21 years, 2 months

RE: [TUHS] SCO reveals major UNIXT IP violations

by norman＠nose.cs.utoronto.ca

Gregg C Levine: Kenneth, doesn't that mean, that their case can be closed, because they themselves are the guilty party? Caldera was bought by SCO. I thought it was the other way around: Caldera bought the UNIX-OS part of SCO, then (around the time the current fracas started) renamed themselves The SCO Group. Norman Wilson Toronto ON

21 years, 2 months

SCO reveals major UNIX IP violations

by Kenneth Stailey

an excerpt: << SCO this week said it was "examining" the AT&T settlement to see who might have leaked the ancient AT&T-derived UNIX� code and put it into a BSD distribution. Allowing such hallowed innovations to be used under an open source license, would, we agreed thoroughly devalue SCO's IP assets. So we set about looking for who could perpetrate such a foul violation. And deep on a warez site of dubious origins, we unearthed a highly incriminating statement. There we found a script kiddie shameless boasting of his crime. The poster claimed that he'd released - "... the ancient UNIX releases (V1-7 and 32V) under a "BSD-style" license. I've attached a PDF of the license letter hereto. Feel free to propogate it as you see fit" Propagate? We shivered. The subject line of the email confirmed our worst fears. [...] So after a little digging, we traced this serious UNIX� violation to a hacker outfit called "Caldera Inc." The email was datelined 23 Jan 2002. Perhaps using an assumed identity, the hacker signed himself as "Dion L. Johnson II - Product Manager and one of many open source enthusiasts in Caldera Intl." We shall be doing some more digging soon, to see where these hackers can be traced. And as dutiful citizens, we shall inform The SCO Group of these violations as our enquiries continue. As soon as we find out who these Caldera hackers are. Can you help? >> complete article: http://www.theregister.co.uk/content/4/34102.html __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree

21 years, 2 months

Why Caldera Released Unix: A Brief History

by Kenneth Stailey

http://linux.oreillynet.com/pub/a/linux/2002/02/28/caldera.html __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree

21 years, 2 months

SCO's additional law suits

by Brantley Coile

Wonder where they are getting the money to do this? Who has the most to gain by shutting down BSD and LINUX? Brantley Coile

21 years, 2 months

SCO To Expand Its Lawsuit Beyond Linux

by Pat Villani

I wonder how much trouble 32I will be: <http://www.atnewyork.com/news/article.php/3110981> Pat -- Technology is a way of organizing the universe so that man doesn't have to experience it. -- Max Frisch

21 years, 2 months

[pups] DEC PRO or P/OS

by Gregg C Levine

Hello from Gregg C Levine Can any of you point me in the directions of a website that completely discusses this operating system, PRO or P/OS? As I recall the DEC Professional system was basically a shrunken PDP-11. Finding one of course, would be a good thing. ------------------- Gregg C Levine hansolofalcon(a)worldnet.att.net ------------------------------------------------------------ "The Force will be with you...Always." Obi-Wan Kenobi "Use the Force, Luke." Obi-Wan Kenobi (This company dedicates this E-Mail to General Obi-Wan Kenobi ) (This company dedicates this E-Mail to Master Yoda )

21 years, 2 months

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