- test-drb@ccmp.vtda.org - classiccmp.org

Mainframe floating point math implementation.

by jnc＠mercury.lcs.mit.edu

> From: Charles Anthony > the missing piece of the rounding algorithim has been identified: > Only round if the mantissa was shifted more then 71 bits. Wow. I'm really impressed that they implemented that in hardware, back then! Then again, they threw so many gates at the Multics CPU, I guess they figured a few more wouldn't matter... ;-) Noel

10 years, 3 months

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Mainframe floating point math implementation.

by charles.unix.pro＠gmail.com

The Multics distribution includes ISOLTS, a surprisingly complete and pedantic processor test program. It is unhappy with our emulated floating point. This should be the floating point used by the GE 6xx series and the Honeywell DPS8 and 6000 series. There is one particular failure that I am driven to seeking help for. If the intricacies of mainframe floating point math h/w do not interest you, time to delete this message and move on. For add and subtract operations, the operand with the smaller has its mantissa shifted right and the exponent incremented adjusted until the exponents match. >From the DPS8M assembly language manual: "The mantissas are aligned by shifting the mantissa of the operand having the algebraically smaller exponent to the right the number of places equal to the absolute value of the difference in the two exponents. Bits shifted beyond the bit position equivalent to AQ71 are lost." Sadly, ISOLTS complains about our implementation. It does helpfully provide what it says are the correct answers. Examination of the answers reveals the it is not the case that the shifted bits are lost; the shift mantissas are rounded according to rules that I can't quite characterize. ISOLTS runs many operands through the UFA (Unnormalized Floating Add) instruction; the current state of my rounding algorithm passes the first 46 tests; fails on the 47th. Everytime I try a different approach, it fails on an earlier test. The best rule that I have is: if the shifted mantissa is all ones and at least one of the bits shifted out was a one, the set the mantissa to 0. Test #47 adds: 700000000000700000000000 E 31. to 202025452400000000000000 E 102. ISOLTS expects 202025452377 777777777777 E 102. and it gets: 202025452400000000000000 E 102. The emulator should not have rounded in this case; but I cannot figure out the rule. I've abstracted the instruction out of the emulator and embedded it in a standalone test harness that runs the 47 tests. https://sourceforge.net/projects/dps8m/files/drop/Charles/ufa47.c Any insights, suggestions for algorithms, reading material would be greatly appreciated. -- Charles

10 years, 3 months

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R: RE: RSX-11 trouble

by supervinx＠libero.it

Thanks! I've to dig it, since my RSX experience amounts to two hours. The IND should have worked before, since there are a lot of user generated .CMD files.

10 years, 3 months

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PDP-12 Restoration at the RICM

by michael.99.thompson＠gmail.com

We are now working on the RK8F controller and RK05 drive. The RK8F has special M7104 and M7105 boards so it will work in the DW8E Omnibus-Posibus chassis. The MAINDEC-08-DHRKA RK8E Diskless Control Test showed that a data-break to address 0000 worked, but did not work to address 7777. After about 4 hours of debugging we found a dirty connection on an M7102 board in the DW8E chassis. This prevented one of the CA signals from the RK8F from being driven onto the Posibus MA. The DHRKA diag now passes, so much of the RK8K and the DW8E are working. We bought a new NiCd battery pack for the RK05 and new weather strip to replace the blower to card cage, and plenum to disk pack seals. There is also a power supply problem that shows up after the RK05 had been powered on for 10 minutes that we need to fix. We have a disk pack that came with the PDP-12, but we don't know if it has LAPS-DIAL or OS/12 installed. Maybe we will solve that mystery in a few weeks. -- Michael Thompson

10 years, 3 months

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PDP-8/E-F-M OEM price list on eBay

by COURYHOUSE＠aol.com

Lyle would love a scan of it! Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 3/26/2016 9:59:18 A.M. US Mountain Standard Time, lbickley at bickleywest.com writes: On Sat, 26 Mar 2016 12:50:02 -0400 (EDT) jnc at mercury.lcs.mit.edu (Noel Chiappa) wrote: > Hey, all you PDP-8 people: there's a PDP-8/E-F-M OEM price list going > on eBay, not very much: > > http://www.ebay.com/itm/272187153709 > > I saw it go past once before, figured someone would notice and grab > it, but I guess not... > > Noel Thanks, I bought it :) Lyle -- Lyle Bickley Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

10 years, 3 months

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PDP-11 M873 ROM card info?

by jnc＠mercury.lcs.mit.edu

> Does anyone know of _any_ information about this series of cards? > ... search as I can, I don't seem OK, it turns out I needed to be looking for "BM873"; under that, it appears to be fairly well documented (prints, TM, etc). > Known variants are the -YA, -YB and -YJ. Most of the later variants are for use on the 11/40 which is the front end of a KL10; there's a PDP-10 document online (KL873.MEM) which lists them all in some detail. Does anyone have a -YB we can dump? (I have a -YA, and will dump that in a few moments, here.) Noel

10 years, 3 months

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Thanks

by rodsmallwood52＠btinternet.com

Hi Guys Thank you to every one who responded to my request for font pics. I found the right one in short order. Regards Rod (Panelman) Smallwood

10 years, 3 months

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PDP-11 M873 ROM card info?

by jnc＠mercury.lcs.mit.edu

Does anyone know of _any_ information about this series of cards? They are quad cards which seem to use two chips of the same types as the M9301 uses four, with 128 words of memory. They thus must fit between the M792 diode ROM card, and the M9301, in timing terms. However, search as I can, I don't seem to be able to find anything on them. Known variants are the -YA, -YB and -YJ. Noel

10 years, 3 months

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Closeup needed

by rodsmallwood52＠btinternet.com

Hi Guys Does anybody have an 8/i or 8/L?. I need a close up pic of the logo area to the top left of the panel. In particular the address text under the logo. The font looks like a made up one and I need to create it. Thanks Rod (Panelman) Smallwood

10 years, 3 months

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PDP-8/E-F-M OEM price list on eBay

by jnc＠mercury.lcs.mit.edu

Hey, all you PDP-8 people: there's a PDP-8/E-F-M OEM price list going on eBay, not very much: http://www.ebay.com/itm/272187153709 I saw it go past once before, figured someone would notice and grab it, but I guess not... Noel

10 years, 3 months

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PDP-8 panels

by rodsmallwood52＠btinternet.com

Hello Guys. To say I'm pleased with the comments on the batch just shipped would be an understatement. However you cant just rest on your laurels. _Batch now in production_ The next batch is already underway and the quantity increased to thirty, It will consist of 8/e (A and B), 8/f and 8/m .All the artwork is done and ready I'm trying to get to a ship from stock situation but I keep getting pre-orders (not that I mind!!) _The PDP-8 Product Line So Far_ PDP-8/e (A) before the switch change PDP-8/e (B) after the switch change PDP-8/f PDP-8/m We also offer to change the address from the standard maynard to galway. If you find any other address variations I'd be interested.to consider them as well. _PDP-8 New Products under consideration _ 1. Front panels for any of the other PDP-8 models, Including the Straight 8 but excluding PDP-8A. 2. Bezels either cast metal as existing or a tough plastic. The metal ones are big and heavy and awkward to ship. 3. Programmers Console PCB (key and lamp unit) / emulator 4. Integrated version of 1 + 2 above 5. Integrated version of 1 + 2 + 3 above _ __PDP-11 Product Line_ 1. Artwork underway for 11/XX panels (11/70 style) 2. No launch date yet but not a long way off. _DEC unlisted above or non CPU panels._ I'll look at anything DEC made that uses a flat substrate (Plastic, Metal or Glass) and has screen printing _Non DEC panels _ I'd be intersted in panels from other makers using similar substrates and screen printing. I think thats the lot Regards Rod (Panelman) Smallwood _ _

10 years, 3 months

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3
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Resistor/Fuse replacement (DEC H7104-D)

by derschjo＠gmail.com

Hi all -- Yesterday I replaced the dead 2N6547 transistor in the H7104 and fired 'er up again. Same exact results. (The timbre of the power supply whine may have changed slightly, it's hard to tell). So, back to the drawing board. I tested the replacement transistor after power-up and it was still good, so at least it wasn't a casualty. On closer inspection, I found what appears to be a large-ish (maybe 2.5-3mm in diameter) resistor with a hairline crack down the middle. Testing reveals it to be open-circuit, and looking at the print set reveals it to be connected to a leg of the transistor I just replaced, so that seems suspect. I noted no smoke or odor during any of the times I've powered this thing up (the resistor is on the outside edge of the supply and I was watching pretty closely at all times) so I assume it was dead long before I got ahold of this machine and I just overlooked it. It's listed in the print set as a 1 Ohm, 2 Watt resistor, with a "FUSE" designation. I'm not entirely sure what I should be searching for for a replacement; clearly the "fuse" part of the designation is important but I'm not sure what a modern equivalent is. I've browsed around Mouser for awhile and I'm not seeing anything obvious. I'm sure this is obvious to anyone with experience -- can you point me in the right direction? Thanks, Josh

10 years, 3 months

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couple of Coco machines also free for pickup

by hilpert＠cs.ubc.ca

Vancouver, B.C. region, as with the other stuff.

10 years, 3 months

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also free for pickup: macClassic

by hilpert＠cs.ubc.ca

I believe it has the nothing-but-horizontal-bars-in-display problem. Picked it up in anticipation of working on it someday but I have too much to do. With keyboard. I think the system disks and manuals are also around. Sorry, but I just can't get into packing&shipping stuff this size.

10 years, 3 months

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Free XT Machine

by ball.of.john＠gmail.com

>I'm up in Kamloops but even at the cost of gas (about $120 tghere and back) I'm tempted to go down and pick >it up if it has not already happened. Failing that, There's a fantastic place at 304 Victoria drive that >will accept the machine if you can't find a home for it. I can vet for them as their specialty is older >machines. Oh butts, that was to be emailed to him directly. Sorry guys. >_>'

10 years, 3 months

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Looking for information about TEP FTI990, Eyring PDOS

by iamcamiel＠gmail.com

Hello everyone, Over the course of the past few days I've made a few repairs to a TEP FTI990, a TMS9900 based industrial microcomputer built on eurocards. I've now got it to the point where it boots and runs Eyring's PDOS operating system. I have a description and pictures of the system here: http://vaxbarn.com/index.php/collection/35-tms9900/69-tep-fti990, and an account of the repairs I did here: http://vaxbarn.com/index.php/collection/35-tms9900/70-tep-fti990-repair I have a copy of PDOS version 2.4C, as well as a PDOS programmer's reference manual. I am looking for additional materials: TEP and PDOS manuals, and floppies with additional programs. I'd like to get in touch with anyone who has some knowledge of these systems. Kind regards, Camiel Vanderhoeven

10 years, 3 months

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Free XT Machine

by ball.of.john＠gmail.com

I'm up in Kamloops but even at the cost of gas (about $120 tghere and back) I'm tempted to go down and pick it up if it has not already happened. Failing that, There's a fantastic place at 304 Victoria drive that will accept the machine if you can't find a home for it. I can vet for them as their specialty is older machines. -John B. >IBM 5160 system >IBM 5151 monitor >IBM clicky keyboard. > >Dual floppy with hard drive, but the hard drive is erratic, perhaps a stiction issue. >Also some extra floppy drives and untested hard drives. > >Mentioned this last year, it's still available, but may soon end up in scrap if it's not taken.

10 years, 3 months

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The Second International Conference on Electronics and Software Science (ICESS2016)

by joan.sdiwc＠gmail.com

You are invited to participate in *The Second International Conference on Electronics and Software Science (ICESS2016) <http://sdiwc.net/conferences/second-international-conference-on-electronics…> *that will be held at the Takamatsu Sunport Hall Building, Takamatsu, Japan on November 14-16, 2016. The event will be held over three days, with presentations delivered by researchers from the international community, including presentations from keynote speakers and state-of-the-art lectures. *Nov. 14-16, 2016* *Kagawa University, Takamatsu, Japan* Submission Deadline Open from now until Sept. 14, 2016 Notification of Acceptance 4-7 weeks from the Submission Date Camera Ready Submission Oct. 14, 2016 Registration Deadline Oct. 14, 2016 Conference Dates Nov. 14-16, 2016 All registered papers will be published in SDIWC Digital Library and in the proceedings of the conference. The conference welcome papers on the following (but not limited to) research topics: Please check here: http://sdiwc.net/conferences/second-international-conference-on-electronics… Contact email: icess16 at sdiwc.net

10 years, 3 months

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help reading 9 track tape

by jecel＠merlintec.com

A student at the Physics Institute at the University of S?o Paulo (Brazil) reimplemented the Manchester DataFlow machine from the 1980s using modern FPGA technology. His goal is to evolve the project so it can be used for current applications. His advisor was at Manchester at the time of the project and brought a 9 track tape written on a PDP-11 which includes the Pascal sources for a compiler for the DataFlow machine. There is no equipment locally that can read the contents of this tape, but it would really help the student's project to have access to these sources. I imagine this stuff might be interesting for other people as well, so perhaps mailing the tape to someone on this list who can read it and put the content online would be the best option? -- Jecel

10 years, 3 months

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cctech Digest, Vol 21, Issue 22

by mark＠matlockfamily.com

On Mar 23, 2016, at 12:00 PM, cctech-request at classiccmp.org wrote: > Message: 2 > Date: Tue, 22 Mar 2016 16:34:01 +0100 > From: Mattis Lind <mattislind at gmail.com> > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Subject: RSX11S > Message-ID: > <CABr82SKAPr=Ck92GKPmog9S64GSe2D2Z47A7yS-mFpAeKcGptg at mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > While archiving a bunch of old 8 inch disks I found disks that apparently > contain an old RSX11S system. I think it has been used in some kind of > railroad CTC system. > > https://dl.dropboxusercontent.com/u/96935524/Datormusuem/PDP11RX01DISKS/DIS… > > It is possible to boot this image in SimH (when setting CPU type to 11/03, > 11/23 (F11), 11/34 or 11/73 (J11) ) > > I get this: > > sim> b rx0 > XDT: 18 > XDT>g > RSX-11S V02 BL18 > > > DEVICE TT01: NOT IN CONFIGURATION > DEVICE FT00: NOT IN CONFIGURATION >> a > MCR -- 1 >> b > MCR -- 1 >> ccc > MCR -- 1 >> > > > So first there is a XDT> prompt. By pressing g or p it starts RSX11S. But > it seems to be possible to do other things. Commands like "s" and "l" do > stuff "x" causes: > > XDT>x > > SYSTEM CRASH AT LOCATION 025276 > > REGISTERS > > R0=000000 R1=177170 R2=003403 R3=157000 > > R4=012422 R5=000002 SP=157004 PS=000340 > > SYSTEM STACK DUMP > > LOCATION CONTENTS > > 157004 157150 > > HALT instruction, PC: 000572 (MOVB #15,R2) > sim> > > I understand that RSX11S is a scaled down version of RSX11M. An embedded > RTOS of that day. But what kind of commands are possible at the XDT and > MCR(?) prompts. I am a little bit curious to understand more about the > system that it has been running. > > > /Mattis Mattis, A good description of what is possible in RSX11S can be found in the manual: http://bitsavers.trailing-edge.com/pdf/dec/pdp11/rsx11/RSX11S_V4.2_Jul85/AA… Because you got the MCR - 1 (Illegal Function) response I think basic MCR must have been included in the system. The XDT> is the eXecutive Debugging Tool and is similar to ODT. The X is a command to do a crash dump. There are not many MCR commands available in RSX11S, but one that you should try is TAL which if it was included in the system sysgen will display all the installed tasks and their status, ATL shows which tasks are active. RUN task name will execute a task that is installed. The most interesting thing that you might find in the system, if it was included is a task called RSDV1H which displays a live picture of the memory organization and system operation similar to RMD on a RSX11M or M+ system. RSX11S was designed to be a memory resident real-time priority driven multitasking system. It is booted from a disk but really doesn't have a file system unless it is included in the sysgen and then it only does block I/O type operations. Nonresident tasks can be loaded by a task loader if that capability is sysgened in. This all sounds pretty limiting and it is but still RSX11S can do a lot when needed. Over 30 years ago, I helped create a system that read data from 8 commodity exchanges & a news wire feed in various formats, then sent DECnet data packets to 10 PDP-11/23s running RSX11S. The 11/23s each had 20 VT100s hung off each one (using DLV11Js and DZV11s) with each commodity trader getting customized screens of data in real-time. The goal was to get data to the traders faster than any other commercial service. News headlines scrolled across the bottom of the VT100 and the trader could request specific stories which were stored in a RMS-11 Indexed file back on the main server which was an 11/44 run RSX11M. The RSX11S systems had no disk and were downloaded the OS over the leased data line running at 9600 baud (fast for the day). The 11/23s ran re-entrant Macro-11 code in 256 Kbytes of RAM (OS, programs, & DECnet). Best Regards, Mark

10 years, 3 months

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IBM PC XT free for pickup, Vancouver, BC area.

by hilpert＠cs.ubc.ca

IBM 5160 system IBM 5151 monitor IBM clicky keyboard. Dual floppy with hard drive, but the hard drive is erratic, perhaps a stiction issue. Also some extra floppy drives and untested hard drives. Mentioned this last year, it's still available, but may soon end up in scrap if it's not taken.

10 years, 3 months

1
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FS: DEC Rainbows, PRO 350s, VR201s, LK201s, etc.

by rjlorenzen＠q.com

I have decided to sell off my collection of the above on eBay. I need the money and space and don't want to move them. Just search for my user name, fortran00 (that's double-zero). I am starting with components and will move on to parts, complete systems, docs, software, etc. as I complete an inventory and testing. There are multiples of everything. Deals outside of eBay will be considered, but not for items actually up for auction, as this violates eBay rules. I have a larger discussion of what is available under the listing for Rainbow system units. Everything is tested before sale, but of course I can't guarantee future performance. Richard Lorenzen, fortran00, NA0L

10 years, 3 months

2
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Looking for Eyring PDOS for TMS-9900

by iamcamiel＠gmail.com

If anyone happens to have a copy of the PDOS operating system for TMS-9900 systems, I'd like to know, and hopefully arrange some sort of transfer; I have a TMS-9900 system on eurocards, built by the german company TEP. It was not working when I got it, but I painstakingly debugged a bunch of problems out of it with my trusty logic analyzer. I've now got it up and running to the point where it tries to load the OS from a 5-1/4" floppy disk (79 tracks, 16 sectors, 256 bytes/sector). The BOOT EPROMs contain a bootloader for PDOS, and I have a PDOS manual, but not the operating system itself. PDOS was made by Eyring Research Institute, Inc. Thanks! Camiel Vanderhoeven

10 years, 3 months

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Looking for Eyring PDOS for TMS-9900

by camiel＠camicom.com

If anyone happens to have a copy of the PDOS operating system for TMS-9900 systems, I'd like to know, and hopefully arrange some sort of transfer; I have a TMS-9900 system on eurocards, built by the german company TEP. It was not working when I got it, but I painstakingly debugged a bunch of problems out of it with my trusty logic analyzer. I've now got it up and running to the point where it tries to load the OS from a 5-1/4" floppy disk (79 tracks, 16 sectors, 256 bytes/sector). The BOOT EPROMs contain a bootloader for PDOS, and I have a PDOS manual, but not the operating system itself. PDOS was made by Eyring Research Institute, Inc. Thanks! Camiel Vanderhoeven

10 years, 3 months

1
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R: Opening up PSU for Olivetti M24

by supervinx＠libero.it

Can't check it now... have you looked under the feet on the bottom? Olivetti used to hide screws right there..

10 years, 3 months

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Motorola's Punched-Card Reader

by COURYHOUSE＠aol.com

Ed at SMECC FOUND: In the Motorola annual report from 1967 CONTROL SYSTEMS DIVISION The division completed the best year in its six-year history. Orders increased 40% over the previous year. Additionally, two significant objectives were reached. The first was a move to achieve international stature in the process controls field. Early in the year, a sales and service organization was established in Puerto Rico to serve the mushrooming petro-chemical industry in that area. Also, early in 1968, the division established a fully owned subsidiary in England. The subsidiary, known as Motorola Control Systems, Ltd., will service the process control and information processing markets in the United Kingdom and the European Common Market. Second, through product innovation and sales penetration, the division took a giant step in achieving its primary goal ? placing Motorola firmly in the field of information processing. At the Fall joint computer conference in California, the division unveiled its MDR-1000 Document Reader, the first of a family of low-cost input terminals for information processing systems. The MDR-1000 provides a simple means for entering data into an electronic processing system directly from marked or punched cards and documents. This offers systems designers a new, low-cost method of getting raw data directly from the source, without need for skilled data processing equipment operators. The initial application of this "industry-first" is in processing daily operating information for one of the Bell Telephone systems. The immediate success of the MDR-1000 resulted in an expansion of this customer's program. Potential applications for the MDR-1000 in business, education, industry and government are virtually endless. The division's continuing success in marketing its three major product lines ? supervisory control systems, data systems and process controls systems ? increases its technical skills and disciplines in the related field of information processing. The primary skill involved is computer technology. In the area of process control instrumentation, for instance, the division received several petroleum refinery contracts to supply complete networks of field instruments, plus all related computer interface equipment. Three of these major contracts called for tying in with computers >from three different computer manufacturers. Supervisory control system sales also gained impetus during the year. A large system was designed and installed for the Minnesota Power & Light Co., and other systems are under construction for the Getty Oil Co. and Marathon Pipeline Co. The sale of additional equipment for systems installed in previous years continued to increase during the year. This segment of the total sales picture is significant as engineering development costs were generally charged against the original sale. ok lets find one of these readers! sheet and card.... neat! Thanks Ed Sharpe archivist for SMECC _www.smecc.org_ (http://www.smecc.org) In a message dated 3/24/2016 1:02:25 A.M. US Mountain Standard Time, silent700 at gmail.com writes: I don't know their history as regards computing before the 1980s but Motorola seems to have had a brief flirtation with data processing in the form of their MDR-1000 mark-sense and punched-card reader, a brochure for which I scanned tonight: http://chiclassiccomp.org/docs/index.php?dir=%2Fcomputing/Motorola The original had been damaged by mildew and staining, which I tried to clean up a bit without sacrificing the graphics on the covers, but the inside fared much better. If you're like me, you'll enjoy some juicy shots of telco datacomm equipment, too. I know HP made a similar desktop device but I don't believe this is a rebadge of any other company's product. Or is it? As always, feel free to add to your collections, etc. -j

10 years, 3 months

1
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Motorola's Punched-Card Reader

by COURYHOUSE＠aol.com

does not look like the HP units we had..... another case is the motorola teleprinter see the photo of it on the teleprinter slide rule _www.smecc.org/motolola_government.htm_ (http://www.smecc.org/motolola_government.htm) this unit also appears in the Motorola 1961 annual report. Keep me in the look on this marksense card reader I want to know more Ed# _www.smecc.org_ (http://www.smecc.org) In a message dated 3/24/2016 1:02:25 A.M. US Mountain Standard Time, silent700 at gmail.com writes: http://chiclassiccomp.org/docs/index.php?dir=%2Fcomputing/Motorola

10 years, 3 months

1
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DEC PDP-16 books

by dstalk＠execulink.com

Hi, I was considering scanning "PDP-16 Computer Designer's Handbook" (1971, DEC) and "Designing Computers and Digital Systems" by Bell, Grason, and Newell (Digital Press, 1972) and have a couple of questions: 1. Are there already existing scans? 2. What is their copyright status? Don

10 years, 3 months

2
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Connecting a Cambridge Z88 to the Internet

by lproven＠gmail.com

I've been asked about doing this for an exhibition. >From some cursory Googling, it seems that the Z88 has a terminal emulator, and equipped with a suitable serial cable, you could just run a cable to a host device with an Internet connection and have a text-only terminal session fairly readily. Not much more than that, though. Has anyone on CC done this? -- Liam Proven ? Profile: http://lproven.livejournal.com/profile Email: lproven at cix.co.uk ? GMail/G+/Twitter/Flickr/Facebook: lproven MSN: lproven at hotmail.com ? Skype/AIM/Yahoo/LinkedIn: liamproven Cell/Mobiles: +44 7939-087884 (UK) ? +420 702 829 053 (?R)

10 years, 3 months

6
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The Fourth International Conference on Digital Information Processing, E-Business and Cloud Computing (DIPECC2016)

by joan.sdiwc＠gmail.com

You are invited to participate in The Fourth International Conference on Digital Information Processing, E-Business and Cloud Computing (DIPECC2016) <http://sdiwc.net/conferences/dipecc2016/> that will be held in Asia Pacific University of Technology and Innovation (APU), Kuala Lumpur, Malaysia, on September 6-8, 2016 as part of The Fifth World Congress on Computing, Engineering and Technology (WCCET). The event will be held over three days, with presentations delivered by researchers from the international community, including presentations from keynote speakers and state-of-the-art lectures. September 6-8, 2016 ? Kuala Lumpur, Malaysia Asia Pacific University of Technology and Innovation (APU) Website: http://sdiwc.net/conferences/dipecc2016/ ================ *IMPORTANT DATES* Submission Dates Open from now until August 6, 2016 Notification of Acceptance August 20, 2016 or 4 weeks from the submission date Camera Ready Submission Open from now until August 26, 2016 Registration Deadline Open from now until August 26, 2016 Conference Dates September 6-8, 2016 The submission is open until August 6, 2016. Please consider submitting your papers to DIPECC2016. SUBMISSION LINK: http://sdiwc.net/conferences/dipecc2016/openconf/openconf.php EMAIL: dipecc16 at sdiwc.net

10 years, 3 months

1
0
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Motorola's Punched-Card Reader

by silent700＠gmail.com

I don't know their history as regards computing before the 1980s but Motorola seems to have had a brief flirtation with data processing in the form of their MDR-1000 mark-sense and punched-card reader, a brochure for which I scanned tonight: http://chiclassiccomp.org/docs/index.php?dir=%2Fcomputing/Motorola The original had been damaged by mildew and staining, which I tried to clean up a bit without sacrificing the graphics on the covers, but the inside fared much better. If you're like me, you'll enjoy some juicy shots of telco datacomm equipment, too. I know HP made a similar desktop device but I don't believe this is a rebadge of any other company's product. Or is it? As always, feel free to add to your collections, etc. -j

10 years, 3 months

1
0
0 0

Opening up PSU for Olivetti M24

by robert.jarratt＠ntlworld.com

I have just acquired an Olivetti M24. I want to inspect the PSU and I have removed it from the machine. But I am struggling to remove the only seemingly removable panel. This is the one with the mains socket and the on/off switch on it. It looks as if it might be hinged at the bottom, but it won't pivot out or come away. Does anyone know how to get inside this PSU? Thanks Rob

10 years, 3 months

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Reproduction 8/e panel from Rod Smallwood

by michael.99.thompson＠gmail.com

I received my reproduction 8/e panel from Rod Smallwood (aka "panelman") this week. It looks spectacular compared to the peeling paint on the original. Rod did not drill the hole for the rotary switch because the position varies a little depending on the revision of the switch panel. I put the original panel on top of the new one, marked the rotary switch location, drilled a pilot hole and successively larger holes. I had to adjust the position of the AC power switch a little to optimize the clearance around the switches, but that was easy. The original panel had rubber bumpers between the panel and the front of the chassis that I will attach to the new panel with double sided adhesive tape. The original panel had a tapered relief at the back of the hole for the AC power switch, but the new one does not. I will use a file or Dremel tool to remove some of the panel material. Without the relief the panel will get stressed near the AC switch. Overall, the workmanship on the panel is spectacular. Now I need to repaint the 8/e front panel frame, RX01, RK05, and TU56 so they look as nice as the new front panel. -- Michael Thompson

10 years, 3 months

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FS: Fulcrum IMSAI 8080 clone system

by sellam＠vintagetech.com

I'm selling this interesting off-shoot of IMSAI history. It's a Fulcrum Data Systems IMSAI 8080 clone in turnkey configuration. Fulcrum was started by Bruce Wright of WW Component Supply, who competed with Tom Fischer to buy remaining inventory at the IMSAI bankruptcy sale in the early 1980s. Fulcrum was eventually sued and had to cease and desist but not before a few of these systems were sold. Photos and more information are located here: http://vintagetech.com/sales/S-100/Fulcrum/ It powers up but I haven't tested the logic. The bus power is fused and I don't have the fuse caps right now. I can probably round some up with a little scrounging. Otherwise I tested all the voltages coming off of the power supply and they are good. I'm asking $1,200 for the complete system (CPU + dual drive unit) but I'm willing to entertain offers. Please inquire directly via private e-mail. You might also want to check out the other stuff I have for sale by starting here: http://vintagetech.com/sales/ Thanks! -- Sellam Abraham VintageTech ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintagetech.com Whatsoever a man soweth, that shall he also reap. The truth is always simple. * * * NOTICE * * * Due to the insecure nature of the medium over which this message has been transmitted, no statement made in this writing may be considered reliable for any purpose either express or implied. The contents of this message are appropriate for entertainment and/or informational purposes only. The right of the people to be secure in their papers against unreasonable searches and seizures shall not be violated.

10 years, 3 months

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TI Silent 743/745 question.

by Corey.Cohen＠ca.com

I'm trying to troubleshoot a TI silent 743/745. When you press the "rubout" key should it print anything like an underscore? Besides sending the rubout character, what does the actual print head do? Backup? Print an underscore? Thanks, Corey corey cohen u??o? ???o? Mobile: +1 917 747 1408<tel:+1%20917%20747%201408>

10 years, 3 months

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Looking for I/O specs HP 9000/236 - 9836CU

by pete＠petelancashire.com

I just acquired one of the guys w/o a display Looking for the spec's of the display connector. I have what I believe to be the pinout but nothing on timing, scan rates, levels etc. Other identification on the thing is "1 MB Board internal set as 1st Card" Upgraded to 9836CU NO BATT / DOES NOT START / BOOT ? Model ID tag 9836C / 2210A01010 -pete

10 years, 3 months

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Resistor/Fuse replacement (DEC H7104-D)

by jnc＠mercury.lcs.mit.edu

> From: Josh Dersch > I have no excuse, I just get nervous working on these things. I should hope you do get nervous! Anytime one is working around equipment that contains lethal voltages, one _should_ be nervous! It helps with... > I suppose eventually I'll get used to it. Don't get too used to it, one wants to always be aware and cautious! (I myself am missing half a nail - and I'm lucky that's all that's missing - because I got too "used to" working with my table saw...) Noel

10 years, 3 months

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Andy Grove dies

by c.murray.mccullough＠gmail.com

Andrew Grove, co-founder of INTEL, passed away.Truly a giant of our industry. He made possible, or promoted, the brains and memory chips that drive our machines, old and new.

10 years, 3 months

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Anyone want some Polymorphic 88 manuals and disks?

by ben＠bensinclair.com

I had a Poly 8813, and just found that I still have the System 88 User's Manual, including the Macro 88 manual, schematics, and 16K RAM manual/schematics. I also have some disks that came with the system, though their status is unknown. I believe many of them were just blank, but there is some system software and a general ledger program disk. Anyone want these? The manuals seem to be readily available online already. -- Ben Sinclair ben at bensinclair.com

10 years, 3 months

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Restoring Nylon parts (like the card guides in a PDP-8a chassis)

by dpi＠dustyoldcomputers.com

A friend mentioned that there was a thread about the card guides in an 8a or 8e chassis but I was unable to locate it so I am posting this as a new thread as it has more relevance than just specifically those card guides. Nylon is hygroscopic. Hygroscopic means it has the ability to absorbs water. As nylon ages it drys out. When nylon dries out it shrinks and it becomes brittle. If a nylon part has not yet cracked or been damaged by UV it can be restored to almost like new simply by boiling it in water for 15 to 20 minutes. Boiling will force water back into the material and it will expand and soften. Do not use a pan with a ceramic type of non stick coating. I almost ruined a 10" skillet because it imparted a flavor to the coating which then transferred to the food cooked in the skillet. I don't know what effect microwaves would have on the Nylon matrix so I suggest you just use something like a Corning Ware ceramic glass pan on your range. I was able to restore almost all the unbroken card guides on my 8a. A couple of them had taken on a permanent bend due to excessive shrinkage. Some had broken pins. A few of the pieces expanded too much and you could plug them into the chassis but they bowed away from the edge because they had lengthened beyond original length. Waiting a few weeks allowed them to dry out a little and shrink and restored them to original size. Unfortunately there are no adhesives that will adhere to nylon long term so it is not possible to repair broken nylon parts in a usable manner. Nylon while cheap and easy to injection mold was probably not the best choice for card guides. But then who would ever have expected these machines to still be coveted 40 years after manufacture. -- Doug Ingraham PDP-8 SN 1175

10 years, 3 months

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RSX11S

by mattislind＠gmail.com

While archiving a bunch of old 8 inch disks I found disks that apparently contain an old RSX11S system. I think it has been used in some kind of railroad CTC system. https://dl.dropboxusercontent.com/u/96935524/Datormusuem/PDP11RX01DISKS/DIS… It is possible to boot this image in SimH (when setting CPU type to 11/03, 11/23 (F11), 11/34 or 11/73 (J11) ) I get this: sim> b rx0 XDT: 18 XDT>g RSX-11S V02 BL18 DEVICE TT01: NOT IN CONFIGURATION DEVICE FT00: NOT IN CONFIGURATION >a MCR -- 1 >b MCR -- 1 >ccc MCR -- 1 > So first there is a XDT> prompt. By pressing g or p it starts RSX11S. But it seems to be possible to do other things. Commands like "s" and "l" do stuff "x" causes: XDT>x SYSTEM CRASH AT LOCATION 025276 REGISTERS R0=000000 R1=177170 R2=003403 R3=157000 R4=012422 R5=000002 SP=157004 PS=000340 SYSTEM STACK DUMP LOCATION CONTENTS 157004 157150 HALT instruction, PC: 000572 (MOVB #15,R2) sim> I understand that RSX11S is a scaled down version of RSX11M. An embedded RTOS of that day. But what kind of commands are possible at the XDT and MCR(?) prompts. I am a little bit curious to understand more about the system that it has been running. /Mattis

10 years, 3 months

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Andrew S.Grove 1936-2016

by spedraja＠gmail.com

https://newsroom.intel.com/news-releases/andrew-s-grove-1936-2016/?utm_cont… Gracias | Regards - Saludos | Greetings | Freundliche Gr??e | Salutations ? -- *Sergio Pedraja* -- twitter: @sergio_pedraja | skype: Sergio Pedraja -- http://plus.google.com/u/0/101292256663392735405 http://www.linkedin.com/in/sergiopedraja ----- No crea todo lo que ve, ni crea que est? vi?ndolo todo

10 years, 3 months

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Baydel Unibus disk systems

by tmfdmike＠gmail.com

Folks, I've found something I forgot I had; a Baydel Unibus disk controller. At one time I had 3 or 4 of these in complete systems but carelessly managed to trade them all away(!) - except this one board. They were all identical; a pdp-11/04 with a quad Unibus Baydel disk controller hooked up to an 8" hard drive in a separate rack mount. In use the Baydel subsystem emulated multiple RK05s. The part number on the board is B01061. Unusually Google seems to be utterly silent on the subject; it seems Baydel and these products have slipped beneath the digital waves without trace. Does anyone have any information? I just have the controller board; I don't have any of the hard drives left. All I remember is the disk was an 8" and the interface is a single 40-pin cable; so not SMD and not SCSI. Far too early for IDE or ATA. Any suggestions for what the interface might have been and what disks might have been used? What hard disks were around in late 70s / early 80s that used a single 40-pin connector?? Thanks Mike http://www.corestore.org 'No greater love hath a man than he lay down his life for his brother. Not for millions, not for glory, not for fame. For one person, in the dark, where no one will ever know or see.'

10 years, 3 months

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Andy Grove passed away last night

by curiousmarc3＠gmail.com

>From the CHM: "Dear all, The museum is remembering Andy S. Grove, who passed away last night. Please read David C. Brock?s timely blog post this evening, http://www.computerhistory.org/atchm/remembering-andy-s-grove/ Best, Kirsten Tashev Vice-President, Collections & Exhibitions Computer History Museum" I met him during my time at Intel, he attended a couple important meetings (acquisitions discussions, company wide technical strategic planning meetings, quarterly meetings). But already in not so good health and not saying much. We sure listened when he spoke up. I remember in particular once when Intel had a really bad quarter because we raised the price of Flash, after misjudging worldwide inventory. We consequently lost a large part of the market to Samsung ? which probably never returned. Most CEOs would have fired the VP, but instead he took the mike and congratulated him for having had the guts to raise prices. We all applauded, but I distinctly remember I wasn't quite sure why... Bless his soul, he brought a company back from the brink of extinction selling RAM at negative margins, to industry dominance in microprocessors with 65% gross margins. That is excessively difficult to do. Marc

10 years, 3 months

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Anyone in the PNW Going to VCFwest this August?

by ball.of.john＠gmail.com

I'm trying to figure out a logistical nightmare to get a number of machines down there before I commit to any reservations. I'm several hours East of Vancouver Canada but there is several hundred pounds in Silicon Graphics workstations, monitors and peripherals I planned to take. My car is far too small and I am not fully licensed to rent a truck for the week. Best I can hope is someone else with a large vehicle is going the same direction there and back. Can totally help to pay some of the costs. -John

10 years, 3 months

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VCF Southeast + East details updated

by cctalk＠snarc.net

It's almost time for two awesome Vintage Computer Festival shows! VCF Southeast is April 2-3. Details are here: http://vcfed.org/wp/festivals/vintag...val-southeast/. VCF East is April 15-17 (now including Ted Nelson!). Details are here: http://vcfed.org/wp/festivals/vintag...festival-east/.

10 years, 3 months

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Request for TU58 tapes (DECtape II)

by malcolm＠avitech.com.au

I've just finished a restoration of a TU58 drive. I'm looking for a small quantity of TU58 tapes (perhaps 2 tapes?) to use with it. Ideally I'm looking for tapes that have been run through a drive recently and known to be not shedding oxide. If anyone has some that they are prepared to part with, please let me know. I'm happy to pay for the tapes plus shipping. Thanks - Malcolm.

10 years, 3 months

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DEC H7104-D power supply tips?

by derschjo＠gmail.com

Hi all -- My call for a VAX-11/750 a month or so ago actually bore some fruit (locally, even!) and as of a couple of weeks ago, I now have a very nicely configured 11/750 system taking up most of the basement. The previous owner got it after it was retired from a local(ish) university in the mid 1990s and it has not been powered on since then. Apparently at the time of its retirement the power supplies were exhibiting "random issues." (No more detail is available than that on the history...) At any rate, I went through the two power supplies (and the small pilot supply in the power controller) and found a lot of leaky capacitors (as in, yellow/brown goo was coming out of maybe 2/3 of them) so I went ahead and recapped the whole thing. At the moment I have things running on a dummy load in the 11/750 chassis. (the harnesses are still hooked to the chassis backplane, but all cards have been pulled, and the backplanes thoroughly checked for bent pins, etc.) The H7104-C (2.5V) supply seems to be working fine but the main 5V supply in the H7104-D is not doing so well (and as a result the other voltages it's supposed to be producing are also not present). The Power Controller lights up the "Reg. Fail" lamp (I don't know why the 5V Fail lamp isn't also on) and the 5V supply emits a loud (somewhere around 400Hz?) whine/squeal. I get about .3V out of it with a load. Without a load there's no squeal and I get about 5.6V, but that's not particularly useful. I've double-checked everything in the H7104-D and there's nothing obviously wrong (no caps installed backwards, no scorched components). At the moment the H7104-D is hooked up only to a dummy load, so it's not anything on the backplane shorting out or causing issues. This is another one of those cases where I've gotten myself in over my head with large, complicated power supplies -- anyone have any experience with these? Any tips? Thanks as always, Josh

10 years, 3 months

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A gold mine for anybody in Austin...

by r3trohub＠gmail.com

Unfortunately, I'm nowhere near Austin! But here is a great gold mine for somebody local http://austin.craigslist.org/sys/5436553322.html

10 years, 3 months

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Free: DEC 19 Inch Rack and Kennedy Tri-Density 9-Track Drive in Exeter, NH, USA

by mardy＠me.com

I have a vintage DEC 19 inch rack with a Kennedy 9400 Tri-Density 9-Track tape drive located in Exeter, NH, USA that needs a good home. If you?re interested I can send some photos, etc. Thanks, -Mardy

10 years, 3 months

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