test-drb

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101090 discussions

by ggs＠shiresoft.com

I just finished laying out the board for the MEM11A. The last roadblock was figuring out where the last 3 unrouted wires were. EagleCAD didn?t make it easy to find them and I haven?t quite figured out how to use the autorouter on Eagle 7.5, so I did this all by ?hand? (at just under 2000 wires it took a while). I haven?t re-set the grid from all of the other boards (all thru hole parts) that I?ve done, so this board is probably not optimal (plus I was getting the hang of doing a 4 layer board). I ran into a lot of wiring congestion that caused me to reroute the entire board as I moved parts around. Even with a finer grid pitch it?s unlikely that the UMF11 will fit on a single SPC board. I?m going to check the board over for the next week or so before I send it out and about 4 weeks after that I?ll have the first boards that I can populate and try out! TTFN - Guy

9 years, 1 month

Here's what happens when an 18 year old buys a mainframe...

by COURYHOUSE＠aol.com

reminds me of myself dragging him big racks of military comm surplus gear when I was in HD Keep it up Connor! we are proud of ya! Ed Sharpe archivist for SMECC _www.smecc.org_ (http://www.smecc.org) In a message dated 3/29/2016 4:28:17 P.M. US Mountain Standard Time, jwest at classiccmp.org writes: Evan wrote... > Connor is a member of our user group here in the Mid-Atlantic. He's > been learning at an astonishingly quick rate! > He's been a member on this list for quite some time, and is a regular on the evening crew of the #classiccmp irc channel as well. He was working on a DG Nova 3 before the Z machine arrived, hope he gets back to it as well :) J

9 years, 1 month

Old PC Boards and some Books to go

by pontus＠Update.UU.SE

Hi Some gems in there. Will you ship? How much do you want for the DECsystem-10 books? /P On Tue, Mar 29, 2016 at 12:08:28PM -0400, Dave Mitton wrote: > Guys, > still trying to clean out my basement... recently I've gathered a bunch > of PC cards from over the years. > and some of my old text and data books. Still working on listing some more > and some various kits of PC software. > I'm not assuming this is worth much, just rather pass it on, than dispose. > > I've put a list (so far) of the stuff on this web page. I have photos of > the PC cards if interested. > http://dave.mitton.com/computer_clearance.html > > Dave Mitton, > North Andover, MA > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus >

9 years, 1 month

Seiko Wrist Terminal RC-1000 software ??

by dave＠mitton.com

Another old thing I've been interested in selling, is my SEIKO RC-1000 Wrist Terminal. This watch has a two line 12 character display, where you could also load text and alarm/reminder data. I used it for phone lists and meeting reminders. It comes with a DB25 cable that connects to the watch to download data. Example on eBay: http://www.ebay.com/itm/RETRO-1980-s-SEIKO-WRIST-TERMINAL-S501-4000-RC-1000… I'd been trying to figure out where I misplaced the 5.25" floppy with the software, until this last weekend, I found it in a stack of old Infocom game floppies. Unfortunately, when I stick it in my one remaining working 5.25" floppy drive, it made a little noise and decided it couldn't detect formatting. Looking at the diskette, there seems to be some marks on the oxide. Possibly a head load problem. It's also possible that it's just an old format this system doesn't recognize. Anyone in the area (north of Boston) have a working old PC? This is labeled as an IBM/MS-DOS version. I used it once many years ago. Does anyone have this software archived or available? SEIKO PCDatagraph Data Manager circa 1984 Dave. --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

9 years, 1 month

Old PC Boards and some Books to go

by dave＠mitton.com

Guys, still trying to clean out my basement... recently I've gathered a bunch of PC cards from over the years. and some of my old text and data books. Still working on listing some more and some various kits of PC software. I'm not assuming this is worth much, just rather pass it on, than dispose. I've put a list (so far) of the stuff on this web page. I have photos of the PC cards if interested. http://dave.mitton.com/computer_clearance.html Dave Mitton, North Andover, MA --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

9 years, 1 month

PDP-11/04-34 Programmer's Console manual error

by jnc＠mercury.lcs.mit.edu

> From: J?rg Hoppe > this is something every '34 owner must go through. Urrr, hadn't thought of that! Sigh. I wonder if it'd been mentioned here before, and I'd missed it because it was before I joined? Luckily, having that cable in backwards doesn't harm anything... Well, hopefully this: http://gunkies.org/wiki/KY11-LB_Programmer's_Console will save at least some other people... Noel

9 years, 1 month

PDP-11/04-34 Programmer's Console manual error

by jnc＠mercury.lcs.mit.edu

So, something I just found out the hard way, while debugging another 'situation' with a PDP-11/04: The KY11-LB Programmer's Console maintainence manual contains a major error, in describing the configuration of the 20-conductor flat cable that connectors the front panel and the UNIBUS interface module (M7859). This is covered in Chapter 9, "Installation", which includes two figures, Figures 9-4 and 9-5. Those figures show the 20-conductor flat cable with the red edge stripe toward the outer edge of the front panel PCB (correct), and also toward the outer edge of the M7859 (WRONG). On the M7859, the red stripe edge needs to be oriented _away_ from the outer edge of the board. If it is plugged in as shown in these figures, the machine will not operate: the four 'RUN/SR DISP/BUS ERR/MAINT' lights will be on, but nothing else, and it will not respond to any keys. Fortunately, plugging the cable in reversed does not damage anything; simply reverse the cable. Noel

9 years, 1 month

Z8-02 demo PCB (was Re: Running a Z8-02 MPD on a breadboard)

by spacewar＠gmail.com

On Tue, May 12, 2015 at 1:41 AM, Eric Smith <spacewar at gmail.com> wrote: > I designed a simple QUIP adapter for use with solderless breadboards, > and wired up a Z8-02 MPD along with a 28C16 EEPROM for the program > memory, a 62256 static RAM, address latch, and decoder. I programmed a > copy of the Z8671 Basic/Debug interpreter into the EEPROM. To my > amazement, it worked the first time. > > Photos: > https://www.flickr.com/photos/22368471 at N04/sets/72157652653732622 I had a PCB made of basically the same circuit, with a TLC7705 voltage supervisor/reset circuit added, and a stuff option for an actual RS-232 port. I've added photos to the album linked above. Unlike the solderless breadboard version, it did not work the first time, and I haven't yet figured out what's wrong with it. The reset circuit seems to work correctly. I should have added a bus connector for I/O expansion. I was in a hurry and it had to be under 100mm square to get the boards made inexpensively. Rather than soldering in the exceedingly rare 3M QUIP socket, I soldered down four 16-position single in line machined-pin sockets, and plugged the QUIP socket into those.

9 years, 1 month

AT&T Uverse IPv6 vs. Mac OS X 10.(old)

by jnc＠mercury.lcs.mit.edu

> From: Jerry Weiss > Disabling IPV6 was the cure. I was _extremely_ amused to hear that. (Backstory: I'm a long-time detractor of IPv6 - I've always thought it's a rolling ball of digestive byproduct, to be blunt. In fact, if I had still been on the IESG when it came around, I'd have canned it. Unfortunately, I'd resigned a while before [for unrelated reasons], something that in hindsight I've greatly regretted, since it removed my ability to can IPv6. So to hear that IPv6 is _still_, all these years later, not that crucial to useful functionality, is very satisfactory to me - it says my assessment was right on the nose. Long may IPv6 fail to be successful! The single biggest/most expensive IT failure of all time?) Noel

9 years, 1 month

OT RE: AT&T Uverse IPv6 vs. Mac OS X 10.(old)

by jwest＠classiccmp.org

TSIA -----Original Message----- From: cctalk [mailto:cctalk-bounces at classiccmp.org] On Behalf Of Robert Johnson Sent: Monday, March 28, 2016 1:36 PM To: General Discussion: On-Topic and Off-Topic Posts <cctalk at classiccmp.org> Cc: jnc at mercury.lcs.mit.edu Subject: Re: AT&T Uverse IPv6 vs. Mac OS X 10.(old) > > On Mar 28, 2016, at 7:32 AM, Noel Chiappa <jnc at mercury.lcs.mit.edu> wrote: > >> From: Jerry Weiss > >> Disabling IPV6 was the cure. > > I was _extremely_ amused to hear that. > > (Backstory: I'm a long-time detractor of IPv6 - I've always thought > it's a rolling ball of digestive byproduct, to be blunt. In fact, if I > had still been on the IESG when it came around, I'd have canned it. > Unfortunately, I'd resigned a while before [for unrelated reasons], > something that in hindsight I've greatly regretted, since it removed > my ability to can IPv6. So to hear that IPv6 is _still_, all these > years later, not that crucial to useful functionality, is very > satisfactory to me - it says my assessment was right on the nose. Long > may IPv6 fail to be successful! The single biggest/most expensive IT > failure of all time?) > > Noel So, I?m curious what your objections to v6 are (I know there are some very good technical objections, because v6 is unlike v4 enough to be a breaking change from a programatic point of view) - or rather, how would you solve the shortage of IP addresses? Robert Johnson -- Gtalk/Jabber:aloha at blastpuppy.com AIM:AlohaWulf Yahoo:AlohaWulf Skype:AlohaWolf Telephone:+1-562-286-4255 C*NET: 18219881 Email:aloha at blastpuppy.com Email:alohawolf at gmail.com -- "Follow the path of the unsafe, independent thinker. Expose your ideas to the danger of controversy. Speak your mind and fear less the label of "crackpot" than the stigma of conformity." - Thomas J. Watson Sr.

9 years, 1 month

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