Send cctalk mailing list submissions to cctalk at classiccmp.org To subscribe or unsubscribe via the World Wide Web, visit http://www.classiccmp.org/mailman/listinfo/cctalk or, via email, send a message with subject or body 'help' to cctalk-request at classiccmp.org You can reach the person managing the list at cctalk-owner at classiccmp.org When replying, please edit your Subject line so it is more specific than "Re: Contents of cctalk digest..." Today's Topics: 1. Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) (Chuck Guzis) 2. Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) (Chuck Guzis) 3. Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) (ED SHARPE) 4. off topic - capatob - saratov2 computer Russsian pdp8? HELP (Dr Iain Maoileoin) 5. Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) (ED SHARPE) 6. Re: PDP-11/45 RSTS/E boot problem (Fritz Mueller) 7. uc04 + scsi2sd ? (Jacob Ritorto) 8. Re: uc04 + scsi2sd ? (Richard Cini) 9. KD11-E/EA microcode flow diagrams (Noel Chiappa) 10. Re: KD11-E/EA microcode flow diagrams (Fritz Mueller) 11. Re: PDP-11/45 RSTS/E boot problem (Jerry Weiss) 12. Re: uc04 + scsi2sd ? (Jerry Weiss) 13. Re: PDP-11/45 RSTS/E boot problem (Fritz Mueller) 14. ISO - 386 or 486 system or cplt mobo (drlegendre) 15. Re: ISO - 386 or 486 system or cplt mobo (wrcooke at wrcooke.net) 16. SMECC on the hunt for Monarch hp 150 poster do U have one? or a hi res clean scan? (ED SHARPE) 17. Re: uc04 + scsi2sd ? (Al Kossow) 18. Re: uc04 + scsi2sd ? (Josh Dersch) 19. Re: PDP-11/45 RSTS/E boot problem (Tony Duell) 20. Re: PDP-11/45 RSTS/E boot problem (Jerry Weiss) 21. Re: OT? Upper limits of FSB (Curious Marc) 22. Re: PDP-11/45 RSTS/E boot problem (Fritz Mueller) 23. Re: PDP-11/45 RSTS/E boot problem (Tony Duell) 24. Re: PDP-11/45 RSTS/E boot problem (Fritz Mueller) 25. Re: ISO - 386 or 486 system or cplt mobo (devin davison) 26. Re: off topic - capatob - saratov2 computer Russsian pdp8? HELP (Bob Smith) 27. Re: off topic - capatob - saratov2 computer Russsian pdp8? HELP (Grant Taylor) ------------------------------------------------------------------- --- Message: 1 Date: Sat, 5 Jan 2019 10:10:04 -0800 From: Chuck Guzis <cclist at sydex.com> To: Fred Cisin via cctalk <cctalk at classiccmp.org> Subject: Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) Message-ID: <1651425f-f406-205d-5284-1e6fd1d7c00a at sydex.com> Content-Type: text/plain; charset=utf-8 Okay, I think I found the reference to it. It turns out that it was a high-school student's project entered in the "Fourth Annual Computer Programming Contest for Grades 7 to 12'. To quote: "The 1966 winner was William J. Elliott, a 12th grade student at West High School in Minneapolis. His project, ELTRAN, is an algorithmic language compiler system for the UNIVAC 422 computer. Until the development of ELTRAN, no compiler existed for the computer." See PDF page 10 here: http://www.bitsavers.org/pdf/computersAndAutomation/196701.pdf --Chuck P.S. One of these days, I'm going to host a course on "how to use Google". ------------------------------ Message: 2 Date: Sat, 5 Jan 2019 10:17:52 -0800 From: Chuck Guzis <cclist at sydex.com> To: Chuck Guzis via cctalk <cctalk at classiccmp.org> Subject: Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) Message-ID: <6e237124-1ac7-700d-b9be-beda8f3a0e16 at sydex.com> Content-Type: text/plain; charset=utf-8 Since it was a 53-year old high-school project, I doubt that you're going to find much on it. However, see the post by Steve Schweda here: https://community.hpe.com/t5/Operating-System-OpenVMS/Left-shift-by-more-th… He may actually have some familiarity with ELTRAN and know where some documentation exists. --Chuck On 1/5/19 10:10 AM, Chuck Guzis via cctalk wrote: ------------------------------ Message: 3 Date: Sat, 5 Jan 2019 18:21:53 +0000 (UTC) From: ED SHARPE <couryhouse at aol.com> To: cctalk at classiccmp.org Subject: Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) Message-ID: <1152753582.13550260.1546712513898 at mail.yahoo.com> Content-Type: text/plain; charset=UTF-8 (COME ON SOCRATES ...? DO YOUR? THING!) In a message dated 1/5/2019 1:49:38 AM US Mountain Standard Time, cctalk at classiccmp.org writes: no is compiler a small one only 2 do loops allowed...ed# Sent from AOL Mobile MailOn Friday, January 4, 2019 Chuck Guzis via cctalk <cclist at sydex.com; cctalk at classiccmp.org> wrote:On 1/4/19 8:42 PM, Fred Cisin via cctalk wrote:> Would be? interesting when you find it.> Not necessarily "tiny"> Remember WATFOR??? (very impressive!) I guesss not too many numerical methods types hwere, but ELTRAN is asubroutine in the EISPACK linear programming set.? Yes, it's all FORTRAN: cc? ? this subroutine is a translation of the algol procedure elmtrans,c? ? num. math. 16, 181-204(1970) by peters and wilkinson.c? ? handbook for auto. comp., vol.ii-linear algebra, 372-395(1971).cc? ? this subroutine accumulates the stabilized elementaryc? ? similarity transformations used in the reduction of ac? ? real general matrix to upper hessenberg form by? elmhes. --Chuck ------------------------------ Message: 4 Date: Sat, 5 Jan 2019 18:36:56 +0000 From: Dr Iain Maoileoin <iain at csp-partnership.co.uk> To: cctalk at classiccmp.org Subject: off topic - capatob - saratov2 computer Russsian pdp8? HELP Message-ID: <4BDE03FE-1A04-4060-B245-6EFDDC503B42 at csp-partnership.co.uk> Content-Type: text/plain; charset=us-ascii Off topic, but looking for help and/or wisdom. If you visit https://www.scotnet.co.uk/iain/saratov < https://www.scotnet.co.uk/iain/saratov>/ < https://www.scotnet.co.uk/iain/> you will see some photos and wire- lists of work that I have started on the front panel of a Capatob 2. I plan to get the switches and lights running on a blinkenbone board with a PDP8 emulation behind it. (I already have an PDP11/70 front- panel running on the same infrastructure) I have been struggling for over a year to get much info about this saratov computer (circuit diagrams etc). So I have started the reverse engineering on the panel. Does anybody know anything about this computer? online or offline it would be much appreciated. Iain ------------------------------ Message: 5 Date: Sat, 5 Jan 2019 19:17:56 +0000 (UTC) From: ED SHARPE <couryhouse at aol.com> To: cctalk at classiccmp.org, cclist at sydex.com, COURYHOUSE at aol.com Subject: Re: ELTRAN THE COMPILER ANY DOCS? (NOT THE SEMICONDUCTOR STUFF!))) Message-ID: <860959218.13562972.1546715876710 at mail.yahoo.com> Content-Type: text/plain; charset=UTF-8 Chuck! Many thanks! Update on? 422 UNIVAC? docs . .? some kind? ?people have mailed in? docs and? ?things? they have? found related to this? 422 UNIVAC ...? things are? shaping up! Many? thanks? ?to? all? these? folks- I? fear ever putting power to this? thing... so? may? parts to go? POP... I have a nice large? Variac.....? ?suggestions? Ed In a message dated 1/5/2019 11:18:00 AM US Mountain Standard Time, cctalk at classiccmp.org writes: Since it was a 53-year old high-school project, I doubt that you're going to find much on it.? However, see the post by Steve Schweda here: https://community.hpe.com/t5/Operating-System-OpenVMS/Left-shift-by-more-th… He may actually have some familiarity with ELTRAN and know where some documentation exists. --Chuck On 1/5/19 10:10 AM, Chuck Guzis via cctalk wrote: ------------------------------ Message: 6 Date: Sat, 5 Jan 2019 12:58:44 -0800 From: Fritz Mueller <fritzm at fritzm.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <06515329-3961-4FF4-87FE-C11C3FDEF2AD at fritzm.org> Content-Type: text/plain; charset=utf-8 Well, there?s wisdom there, for sure! :-) Last night I also managed to put a new RSTS image, sysgen?d with the non-overlapped DK driver, on a different physical pack. It behaved exactly the same way on the real hardware (looping, counting up errors) on boot. So I think now overlapped vs. non-overlapped DK driver is not the issue, and media and image transfer fidelity are not the issue. A memory or MMU problem would be consistent with what has been seen so far, so I may bark up that tree a little more today. Paul, any additional suggestions for things to look at in ODT to try and wring out more information on the specifics of the fault? I did get some MACRO CRC-16 sub-routines coded up last night while waiting for various transfers, so I think I?ll go ahead and finish up the standalone CRC dumper utility today. Lastly, a 5V-tolerant USB FIFO breakout board is supposed to show up in the mails today. If that works out as simply as I hope to interface with a DR11-C, I should have a much better way to blast bits on and off the machine soon. cheers, --FritzM. ------------------------------ Message: 7 Date: Sat, 5 Jan 2019 17:46:33 -0500 From: Jacob Ritorto <jacob.ritorto at gmail.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: uc04 + scsi2sd ? Message-ID: < CAHYQbfABUeqYRHVCDGFJW=AWwEmP85aCn5GUNeeVvbxKVNw=Ow at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" Hey all, Anyone know whether the Emulex UC04 works with the sd2scsi? I just bought a uc04 and it won't talk to any of my old scsi disks, seems to think there's supposed to be a "controller" in between :\ yuck. thx jake P.S. While I'm at it, anyone know how to get UC04 to talk to directly to plain scsi disks and tapes instead of these lunatic ESDI controller bridge things? ------------------------------ Message: 8 Date: Sat, 5 Jan 2019 22:51:54 +0000 (UTC) From: Richard Cini <rich.cini at verizon.net> To: Jacob Ritorto <jacob.ritorto at gmail.com>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: uc04 + scsi2sd ? Message-ID: < C8CACE9E45EB766D.E58C2E33-FDBF-42C3-836D-A38B62C941C3 at mail.outlook.com Content-Type: text/plain; charset=us-ascii I use it with a UC07. Not sure what the difference in the controllers is thought. Get Outlook for iOS On Sat, Jan 5, 2019 at 5:46 PM -0500, "Jacob Ritorto via cctalk" < cctalk at classiccmp.org> wrote: Hey all, Anyone know whether the Emulex UC04 works with the sd2scsi? I just bought a uc04 and it won't talk to any of my old scsi disks, seems to think there's supposed to be a "controller" in between :\ yuck. thx jake P.S. While I'm at it, anyone know how to get UC04 to talk to directly to plain scsi disks and tapes instead of these lunatic ESDI controller bridge things? ------------------------------ Message: 9 Date: Sat, 5 Jan 2019 18:35:38 -0500 (EST) From: jnc at mercury.lcs.mit.edu (Noel Chiappa) To: cctalk at classiccmp.org Cc: jnc at mercury.lcs.mit.edu Subject: KD11-E/EA microcode flow diagrams Message-ID: <20190105233538.972AD18C0BE at mercury.lcs.mit.edu> The copy of the KD11-EA engineering drawings (in the 11/34A Field Maintenance Print Set, MP-00190) on Bitsavers is missing most of the pages that hold the microcode flow diagrams. I have a set of the KD11-EA FMPS (MP-00192), which does have all the missing pages, which I can eventually scan. However, in the interim, the 11/34 Field Maintenance Print Set Vol. 2 (MP-00082) on Bitsavers has a complete set of microcode flow diagrams for the KD11-E (pp. 15- 40 of the PDF), and they are almost identical to the KD11-EA diagrams. The only difference I can see (I compared page by page, to see if each page had the same microinstructions on it) is that on sheet 17; the last microinstruction for RTI/RTT has been moved from 002 -> 744. (The actual microinstruction contents seem to be the same.) I don't know whyo the changed address; I originally thought that perhaps they had to re-do the IR Decode ROMs when they added floating point, and they needed the original location to handle the start of the floating point microcode, but that doesn't seem to be the case. Noel ------------------------------ Message: 10 Date: Sat, 5 Jan 2019 16:04:29 -0800 From: Fritz Mueller <fritzm at fritzm.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: KD11-E/EA microcode flow diagrams Message-ID: <B740924C-3A2A-467D-BD20-71373D26569D at fritzm.org> Content-Type: text/plain; charset=utf-8 That?s interesting... So what?s at 002 now? Maybe something new was required there by micro branch/fork logic, so the original contents had to be moved? ------------------------------ Message: 11 Date: Sat, 5 Jan 2019 18:06:48 -0600 From: Jerry Weiss <jsw at ieee.org> To: Fritz Mueller <fritzm at fritzm.org>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <c8bf1cf0-1cdc-f63b-278a-d0ccd75a86b1 at ieee.org> Content-Type: text/plain; charset=utf-8; format=flowed On 1/5/19 2:58 PM, Fritz Mueller via cctalk wrote: Along those lines if you have a spare disk pack, try putting RT11(FB,XM) on the machine and give it a workout.?? This would exercise the machine a bit more than MAINDECS, though not as much as RSTS. A few suggestions from my ancient history running RK11-C and a mix of DEC and Diablo Drives.? I regularly disassembled, moved cross country and reassembled PDP 11/34 and LSI 11/73 systems. I ran them in small rooms which housed saltwater tanks containing sea creatures. * Given the age of this equipment, double check all the ground connections between the cabinets, PDU's, drives, outlets and CPU. * Carefully check for breaks or problems with drive cables and terminators. * I believe you need a terminator in the RK11-C if the second disk bus is unused. * Try using the drive on the other bus if RSTS can be booted of from DK4. * Make sure you only have one LTC active if a DL11-W and a KW11 are both in use. * If you are not using a common PDU for the CPU, Drive and RK11-C power supplies, make sure they all powered from outlets on the same phase. * Don't leave the disk packs or drives near the tanks.? The squid have good aim and their ink isn't kind to electrical devices. ??? Jerry ------------------------------ Message: 12 Date: Sat, 5 Jan 2019 18:27:15 -0600 From: Jerry Weiss <jsw at ieee.org> To: Jacob Ritorto <jacob.ritorto at gmail.com>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: uc04 + scsi2sd ? Message-ID: <8f48055c-6ca2-d342-25d2-4c2baaedb0d3 at ieee.org> Content-Type: text/plain; charset=utf-8; format=flowed Hi Jake, I don't have a UC04, but its manual states its? Peripheral Interface is SCSI single ended.? The pinout is just like the UC07, except for terminator power. ??? Jerry On 1/5/19 4:46 PM, Jacob Ritorto via cctalk wrote: ------------------------------ Message: 13 Date: Sat, 5 Jan 2019 16:44:51 -0800 From: Fritz Mueller <fritzm at fritzm.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <2CA1BCC4-8E94-4A21-9A3F-10F3AFFDBA03 at fritzm.org> Content-Type: text/plain; charset=utf-8 Hi Jerry, Yup, I have previously had RT-11 running on this machine without incident. Yep, got that in there. Easy enough experiment to try; would need to re-jumper the G740 disk selection flip chip in the RK11-C too, I guess? Only a DL11-W in this system. Ah, haven?t checked that one yet. I will carefully check my basement for squid! --FritzM. ------------------------------ Message: 14 Date: Sat, 5 Jan 2019 19:42:10 -0600 From: drlegendre <drlegendre at gmail.com> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: ISO - 386 or 486 system or cplt mobo Message-ID: < CAFjrmd4Y27od8rxFBHcszAV4=KANscJyuVq31mn6ckE7AQ+wjg at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" I'm interested in finding a 386 or slow 486 machine or moboj ust for playing DOS games. Does anyone have such a thing sitting around, looking for a home? Thanks in advance. ------------------------------ Message: 15 Date: Sat, 5 Jan 2019 22:02:21 -0500 (EST) From: wrcooke at wrcooke.net To: drlegendre <drlegendre at gmail.com>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: ISO - 386 or 486 system or cplt mobo Message-ID: <2039907214.341781.1546743741252 at email.ionos.com> Content-Type: text/plain; charset=UTF-8 I have a couple of 386sx motherboards with I think 1MB ram. I thought I had a full 386 board with 8MB ram but I can't seem to find it. Would one of those work for you? Will "He may look dumb but that's just a disguise."? -- Charlie Daniels "The names of global variables should start with? ? // "? --? https://isocpp.org ------------------------------ Message: 16 Date: Sun, 6 Jan 2019 03:03:29 +0000 (UTC) From: ED SHARPE <couryhouse at aol.com> To: cctalk at classiccmp.org Subject: SMECC on the hunt for Monarch hp 150 poster do U have one? or a hi res clean scan? Message-ID: <2056564350.13640687.1546743809848 at mail.yahoo.com> Content-Type: text/plain; charset=UTF-8 Howdy? from the? ?desert? lands in Arizona!Early in the? HP DOS? PC? campaign? there was the? monarch? butterfly poster used to advertise? HP? 150 ... seeking to recreate? a duplicate? in a? corner of? the? room our? little? hp 150? computer exchange inc? ?demo desk? area? .... the? poster ( or a? print of it... )? ?is? needed! What? great? fun we are? having...? got a? 2886a? (need paper feeder? and receiver? little? flap? things that hung off? printer though)and the? stake of? all the? '150' blue? box? ?software'? to have there too? and other things? ? for the era...any other early poster material? good? too... the monarch? one is? what? sticks in my? brain... OK? also the? HP Portable 110? came? along too... interested in Ad? material for? it... have most of the hardware? to? look? ?interesting I? think. THANKS IN ADVANCE? ED SHARPE? ARCHIVIST FOR SMECC ------------------------------ Message: 17 Date: Sat, 5 Jan 2019 19:55:49 -0800 From: Al Kossow <aek at bitsavers.org> To: cctalk at classiccmp.org Subject: Re: uc04 + scsi2sd ? Message-ID: <9fc4ea8d-2b99-5682-4bef-a25799b4cfd1 at bitsavers.org> Content-Type: text/plain; charset=utf-8 On 1/5/19 2:46 PM, Jacob Ritorto via cctalk wrote: Nope. This card expects pre common command set disks with non- embedded scsi adapters. In a bad old days, you had to configure the scsi drive adapters with disk geometry before you could use them, and the UC04 does that for adapters like the Adaptec 4000. ------------------------------ Message: 18 Date: Sat, 5 Jan 2019 20:41:21 -0800 From: Josh Dersch <derschjo at gmail.com> To: cctalk at classiccmp.org Subject: Re: uc04 + scsi2sd ? Message-ID: <97bc8c2b-9143-3d42-4c22-ec58452b17a3 at gmail.com> Content-Type: text/plain; charset=utf-8; format=flowed On 1/5/2019 7:55 PM, Al Kossow via cctalk wrote: Al's right; I'll add two things: 1) I've used a SCSI2SD in other systems that formerly used an Adaptec 4000/5000 controller with some success, but I was only ever able to get a single drive to work at a time; you may have similar luck with the SCSI2SD if you configure it just right. 2) The SCSI2SD does currently have support for emulating some of these early controllers/bridges, but the Adaptecs aren't on the list yet -- however the SCSI2SD's creator has been open to feature requests in the past, and might be able to add support, and documentation for the Adaptect boards is readily available.? (And the SCSI2SD firmware's open as well, so you can hack it in yourself if you have the time, etc.) - Josh ------------------------------ Message: 19 Date: Sun, 6 Jan 2019 05:17:50 +0000 From: Tony Duell <ard.p850ug1 at gmail.com> To: Fritz Mueller <fritzm at fritzm.org>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: < CAHkUCCzgCmUGP4fD9aKTtNGVfqWahVRxWgHAVSAiu3FHU2J-8g at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" On Sun, Jan 6, 2019 at 12:45 AM Fritz Mueller via cctalk <cctalk at classiccmp.org> wrote: No. One difference between the RK11-C and RK11-D is how it does drive selects. The RK11-C has 4 select lines on each cable, one is asserted at a time. The RK11-D has a 3 bit binary selection. There's a decoder in the RK05 (on the G740 I think) that is enabled when the drive is connected to an RK11-D. The RK03 is 1- of-4 select only which is why it works on an RK11-C and not on an RK11-D. So on the first drive connector of the RK11-C you get selects 0..3. On the second cable you get 4..7. The drive is always jumpered for 0,1,2,3. If it's jumpered as drive 0 and you connect it to the first connector it's DK0. If it's jumpered as drive 0 and you connect it to the second connector it's DK4. -tony ------------------------------ Message: 20 Date: Sat, 5 Jan 2019 23:37:19 -0600 From: Jerry Weiss <jsw at ieee.org> To: Tony Duell <ard.p850ug1 at gmail.com>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>, Fritz Mueller <fritzm at fritzm.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <0381aa1f-bb09-17c7-490f-ed8247779015 at ieee.org> Content-Type: text/plain; charset=utf-8; format=flowed On 1/5/19 11:17 PM, Tony Duell via cctalk wrote: I have used a Diablo drive with 1 of 4 selection on a third party RKV11 controller which was 3 bit binary. It only worked as DK1, DK2 or DK4 for obvious reasons. ------------------------------ Message: 21 Date: Sat, 5 Jan 2019 21:40:10 -0800 From: Curious Marc <curiousmarc3 at gmail.com> To: "Jeffrey S. Worley" <technoid6502 at gmail.com>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: OT? Upper limits of FSB Message-ID: <1B9BC890-8E94-4184-A6F8-6AAD35F5F924 at gmail.com> Content-Type: text/plain; charset=utf-8 Interconnects at 28Gb/s/lane have been out for a while now, supported by quite a few chips. 56Gb/s PAM4 is around the corner, and we run 100Gb/s in the lab right now. Just sayin? ;-). That said, we throw in about every equalization trick we know of, PCB materials are getting quite exotic and connectors are pretty interesting. We have to hand hold our customers to design their interconnect traces and connector breakouts. And you can?t go too far, with increasing reliance on micro-twinax or on-board optics for longer distances and backplanes. Marc ------------------------------ Message: 22 Date: Sat, 5 Jan 2019 21:45:39 -0800 From: Fritz Mueller <fritzm at fritzm.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <52B95127-1712-4E7E-AF23-879C42FD7F1D at fritzm.org> Content-Type: text/plain; charset=utf-8 Hi Tony, I?m speaking of the G740 at C13 on the RK11-C backplane, appearing on sheet RK11-C-06 in the engineering drawings and described in the last paragraph of section 3.2.5 in the RK11-C manual? On my RK11-C, this is jumpered to enable only drives 0 and 1; all other jumpers are unpopulated. --FritzM. ------------------------------ Message: 23 Date: Sun, 6 Jan 2019 05:51:18 +0000 From: Tony Duell <ard.p850ug1 at gmail.com> To: Fritz Mueller <fritzm at fritzm.org>, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: < CAHkUCCwiheajcd31QFD6YMEQVVDk8qM98arTz9RTqy5pPMCmDA at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" On Sun, Jan 6, 2019 at 5:45 AM Fritz Mueller via cctalk <cctalk at classiccmp.org> wrote: Ooops... Yes, you do have to fit the jumper there. Actually, is there a good reason not to fit all jumpers on that board? -tony ------------------------------ Message: 24 Date: Sat, 5 Jan 2019 21:58:48 -0800 From: Fritz Mueller <fritzm at fritzm.org> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: PDP-11/45 RSTS/E boot problem Message-ID: <AE581820-081C-44E4-A543-406FC31FB533 at fritzm.org> Content-Type: text/plain; charset=us-ascii Looking at it, I was just wondering the same thing! ------------------------------ Message: 25 Date: Sun, 6 Jan 2019 01:53:34 -0500 From: devin davison <lyokoboy0 at gmail.com> To: wrcooke at wrcooke.net, "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> Subject: Re: ISO - 386 or 486 system or cplt mobo Message-ID: < CAOpB=UM9O-iJHzRjfgo805+qJ52OzjPPGmH1O=cyH9yq380PmQ at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" I have a stockpile of them. Will get you pictures tomorrow. On Sat, Jan 5, 2019, 11:59 PM Will Cooke via cctalk < cctalk at classiccmp.org> wrote: ------------------------------ Message: 26 Date: Sun, 6 Jan 2019 09:08:03 -0500 From: Bob Smith <bobsmithofd at gmail.com> To: Dr Iain Maoileoin <iain at csp-partnership.co.uk>, "General Discussion: On-Topic and Off-Topic Posts" < cctalk at classiccmp.org> Subject: Re: off topic - capatob - saratov2 computer Russsian pdp8? HELP Message-ID: < CAHtNYbW0GBXV+UPRCwGMZzCnvMNpLCiF5LkG6wez_65w3YxMSQ at mail.gmail.com> Content-Type: text/plain; charset="UTF-8" https://hapoc2015.sciencesconf.org/file/176702 gives a Little more history on Soviet copies of computers. The timing of the production of the Capatob 2 seems to make it a PDP8/L clone, not an M. What is called the 8 is really based on the 5, used 6-bit bytes, 12 bit words, and was Octal based - memory was the most expensive part of the system at least through the early 70s, and thus 12 bit words for double precision, 24bits, was a reasonable approach for a scientific computer. bb On Sat, Jan 5, 2019 at 1:37 PM Dr Iain Maoileoin via cctalk <cctalk at classiccmp.org> wrote: ------------------------------ Message: 27 Date: Sun, 6 Jan 2019 10:42:15 -0700 From: Grant Taylor <cctalk at gtaylor.tnetconsulting.net> To: cctalk at classiccmp.org Subject: Re: off topic - capatob - saratov2 computer Russsian pdp8? HELP Message-ID: < aec7d8ba-4356-8f6f-9bfe-16ac4932cbc0 at spamtrap.tnetconsulting.net> Content-Type: text/plain; charset=utf-8; format=flowed On 1/6/19 7:08 AM, Bob Smith via cctalk wrote: Is "byte" the correct term for 6-bits? I thought a "byte" had always been 8-bits. But I started paying attention in the '90s, so I missed a lot. I would have blindly substituted "word" in place of "byte" except for the fact that you subsequently say "12-bit words". I don't know if "words" is parallel on purpose, as in representing a quantity of two 6-bit word. Will someone please explain what I'm missing that transpired before I started paying attention in the '90s?