test-drb

test-drb@ccmp.vtda.org

101090 discussions

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 _ _

9 years, 1 month

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

9 years, 1 month

couple of Coco machines also free for pickup

by hilpert＠cs.ubc.ca

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

9 years, 1 month

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.

9 years, 1 month

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. >_>'

9 years, 1 month

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

9 years, 1 month

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.

9 years, 1 month

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

9 years, 1 month

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

9 years, 1 month

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

9 years, 1 month

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