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

by allisonp＠world.std.com

<>According to a friend who worked in Field Circus, if the systems were <>inside DEC, that made it much MORE likely that they were entirely <>non-standard configurations that bear no relationship to the label <>on the outside of the box. ;) you betcha. Us mill rats were hacking things together that made the the infernal field circus nuts. I worked for CSSE, the Field Circus engineering arm. Our cave was terminals and printers to year 0. However I was one of those that scrounged whereever I was for systems and put together some creative combinations that were not warmly recieved by the PDP-11 CSSE group we were colocated with. I can still hear Evans asking me how I got two RL02s, 2 BA11 11/23s and RX02 in the same 40" rack then plugged a LN01 laser printer into it. He swore there was no compatable Qbus interface for the laser printer till I showed him a LPV11 with a LPV180 cab kit! There was the many examples of unsupported but works. Remnents of that beast followed me around from '84 and still sits in my room in a different rack. Anywho, I've seen a lot of systems, the joke was missed on badge vs cpu installed. Most if not all were never what the badge said they were. If I wanted to be pendantic I do have the MicroPDP-11 handbooks. But like I'd said and I think Tim said in the end it's the contents not the label and whatever you do have, enjoy it. They are all in whatever current incarnation may now be, good systems that meet the "Robust and mature systems we know how to use." mantra. Allison

26 years, 9 months

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PDP 11/70's for sale

by mbg＠world.std.com

>> Unless there was an upgrade option for the VT52 I don't know about, the >> 'VT52' w/printer is actually designated the VT55. > >Not according to my docs (and the unit I have coupled up to my 11/45) > >The VT55 is a VT52 with a 'waveform generator' card. This is an option >for plotting graphs, roughly compatible with the VT105. Basically, you >can store 2 'heights' for each vertical dot-column on the screen, and >either display a point at that height (for plotting mathematical >functions) or all points below that height (for plotting barcharts). It >gave a reasonable resolution for this, with very little memory. > >The electrolytic copier (wet paper printer) was an option for either the >VT52 or the VT55 (and maybe other VT5x terminals). Most VT55s had it >fitted. Most VT52s didn't. But all combinations were possible. Thanks, I stand corrected. I guess I have just never seen a VT52 with the copier, only VT55s. (Guess I had to be there... :-) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

2
1
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PDP 11/70s For Sale

by mbg＠world.std.com

>That was the plan. I found that the 11/130 I have runs RT-11 quite >nicely and it's the fastest of the tu58 based systems (uses an oddball >parallel interface tu58). And is that using the technique I developed for positioning files on the TU58 to reduce latency on RT? I've had RT cold boot from TU58 in as little as 28 seconds... >Think of it as more flexible... runnin for the door. ;) Ahem... >Seriously the hardware boys seemed to be just a touch off center for the >realm. Even the VT180, a very good CPM engine design they left off >two sided (rev-H has it but I've never seen a real one) and that crippled >disk expansion to the denser two sided media. Bounded System: A system which would be usable if it could be expanded... ... but it can't because it's bounded. Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

2
1
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trackstar revisited

by SUPRDAVE＠aol.com

In a message dated 9/25/99 12:31:58 AM Eastern Daylight Time, jpero(a)cgocable.net writes: > > In a message dated 9/24/99 11:00:12 PM Eastern Daylight Time, > > lwalker(a)mail.interlog.com writes: > > > > > > > > To my mind the PS/1's all had a 2xxx-xxx designation. I have a 2011 > > > which is a 286. The monitor unit contains the PSU. It also had a built- > in > > > 2400 modem. The 2021 is virtually identical but IIRC had more memory. > > > I also have a 2123 and a 2133 which were 386's. > > > > 2133 3x3 case > > 2155 5x5 case (bigger) > > 2168 tower unit > > What about 2144's? 2144 are IBM aptiva models. 4 slot/4 bays > > > > 2011 and 2121 used special monitor with computer's power supply in it. > > 2123 used either a ps2 model 30 or mod 55sx low profile case. > > interesting fact: some midrange 486 ps/1 models were netware certified! > > > Trivia: > > Most of these PS/1s, VPs and Aptivas (especially 386, 486 and > pentiums that used slot tree card and in tower cases with > daughterslot board off the motherboard in H fashion. > That said, this IBM interestingly used LPX factor form motherboards > down to pinouts of the tree slot on board made by IBM or using > non-ibm boards in their ibm-made cases. > > While on this thing, I'm looking for a used or busted PSU and tree > slot board for my aptiva. Both parts are missing. The model is 2144 > type G-1 using intel board (Advanced/MN) that worked. > Secondly, I have VP mod 638x series Type 1 motherboard (92F0388) > needs writeback cache module 256K. Failing that, do anyone got a > used either LPX factor form for pentium 60/66 or LPX pentium socket 7 > motherboard for sale? I do have the P5 66 cpu. > aptiva 2144-82p and 2144-86p were p60 models. probably wont have much luck finding used parts on aptivas though although i did find a 2144-22p for $5 that works good. try www.direct.ibm.com that's IBM's parts counter. > Would be wonderful for yours to shake down your friend network on > this leads. >

26 years, 9 months

1
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external Rf Modulators

by CLASSICCMP＠trailing-edge.com

>Does anyone know of a company that is still setting external RF Modulators? >This would be used to hook up the video output of a Apple ][ series >computer to a standard TV. I know I could use a VCR, but i'd like to >have a RF Modulator... I picked up my latest Jameco catalog, and they've got two RF modulators available. Both are switch selectable for Ch 3 or Ch 4. Part No 135191 takes an 8VDC power supply, and is $3.95. Part No 141639 takes a 12VDC power supply, and is $4.95. For more info, see http://www.jameco.com/ I seem to recall a header connector in the Apple II specifically intended for supplying modulator power. If this has 12VDC on it, you're set! Jameco also has some other Apple II parts availble, including a replacement II/II+/IIe power supply (Part no 22269) and a IIGS power supply (Part no 85518). -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 9 months

2
1
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external Rf Modulators

by lemay＠cs.umn.edu

Does anyone know of a company that is still setting external RF Modulators? This would be used to hook up the video output of a Apple ][ series computer to a standard TV. I know I could use a VCR, but i'd like to have a RF Modulator... -Lawrence LeMay lemay(a)cs.umn.edu

26 years, 9 months

4
3
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trackstar revisited

by allisonp＠world.std.com

<I have model m35 (386sx and slc version do exist) that has ISA slots, <m25 and m30 can either be 8088, 286 or SX. Model 40 used same board <as m35 except more slots and more drive bays. To differeniate: <starting model series based on MCA from ISA is m50 and up. Ok... by the book: PS2/m25 is a 8086 (xt class) with 3 ISA slots and floppies PS2/M30 is the same with a hard disk. That and the trackstar board was only availabel as ISA that I can find data on. They were most commonly seen around here in Tandy 1000sx/ex machines. the PS1/m25 is 286 as are a slew of other PS1 ISA models but they are somehow modeled as PS1 members of the PS2 family of PC systems. Now we have a subspecies of a species I guess. Bizzare but they are all 85xx-xxx! So much for consistant naming. <BTW, all PS/2, many PS/1s, some Aptivas, any IBM machines were good <made quality-wise even case components and circuit boards. I have a PS2/25 (8530-001) and a PS2/m50z 8550-061 and they are certainly well made and easy to work on. A lot of people like the ps2/m25s as they were ISA and fast for XT with good video and a nice small pizza box. the ugly ones (to some) were the integral monitor varients. Allison

26 years, 9 months

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PDP 11/70s For Sale

by allisonp＠world.std.com

<>That was the plan. I found that the 11/130 I have runs RT-11 quite <>nicely and it's the fastest of the tu58 based systems (uses an oddball <>parallel interface tu58). < <And is that using the technique I developed for positioning files <on the TU58 to reduce latency on RT? I've had RT cold boot from TU58 <in as little as 28 seconds... That and the PDT11/130 parallel interface VS standard TU58 serial interface. The PDT11 version of the TU58 is an oddity and becuase of the parallel interface some of the serial versions buffer overflow and data pasing issues are not a reality so you end up running closer to the possible peak data rate with less host latency. The giveback is the PDT11 uses the LSI-11 clearly the slowest of the PDP-11s (t11 can beat it!) so if there is any procesing the tu58 is not the bottleneck anymore. Allison

26 years, 9 months

1
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PDP 11/70s For Sale

by allisonp＠world.std.com

<>the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't <>mind using a tu58 to boot it! < <I've not tried an 11/23... but the 11/73 doesn't work for me... Never tried the 11/73 as I never had one that was dual width. <Why would you need a TU58 to boot the system if you have an RQDX3 <(supposedly attached to some disk)? The disk and breakout were powered off a second ba11-v (the disk would crush the PS current limit if the first box powered it). The TU58 booted it as I didn't have a simple MSCP toggle in boot. Allison

26 years, 9 months

1
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PDP 11/70s For Sale

by mbg＠world.std.com

>;) you betcha. Us mill rats were hacking things together that made the >the infernal field circus nuts. Yep... >I worked for CSSE, the Field Circus engineering arm. Our cave was >terminals and printers to year 0. However I was one of those that >scrounged whereever I was for systems and put together some creative >combinations that were not warmly recieved by the PDP-11 CSSE group we >were colocated with. I can still hear Evans asking me how I got two >RL02s, 2 BA11 11/23s and RX02 in the same 40" rack then plugged a LN01 >laser printer into it. He swore there was no compatable Qbus interface >for the laser printer till I showed him a LPV11 with a LPV180 cab kit! >There was the many examples of unsupported but works. Remnents of that >beast followed me around from '84 and still sits in my room in a >different rack. And I worked in the RT-11 development team, but was the 'procurement division' (scrounger) who would collect parts and put together systems in our lab (the Cave). I also got involved with a lot of the reconfigurations when an SPR came in reporting a problem with a specific configuration. My best scrounge, though, was an 11/84 system built from parts found in various locations around the Mill (I regularaly walked around the Mill looking for discarded -11 parts) >Anywho, I've seen a lot of systems, the joke was missed on badge vs cpu >installed. Most if not all were never what the badge said they were. >If I wanted to be pendantic I do have the MicroPDP-11 handbooks. But >like I'd said and I think Tim said in the end it's the contents not the >label and whatever you do have, enjoy it. They are all in whatever >current incarnation may now be, good systems that meet the "Robust and >mature systems we know how to use." mantra. Not lost on me... I've got a couple of BA123 systems at home which very clearly are uVAXII/GPX systems (badge) -- but one is an 11/83+ and the other is an 11/93. I also have a BA213-based box which states it is an 11/83, but is a mongrel VS3600 (or so). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

1
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PDP 11/70s For Sale

by mbg＠world.std.com

>I've always run out of slots before running out of power. > >the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't >mind using a tu58 to boot it! I've not tried an 11/23... but the 11/73 doesn't work for me... Why would you need a TU58 to boot the system if you have an RQDX3 (supposedly attached to some disk)? >For the pro350, not so for the PDT11/1xx. Right... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

1
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New pdp-8 Documents Added to Highgate

by mcquiggi＠sfu.ca

Hi All: New documents added to http://highgate.comm.sfu.ca/pdp8 this evening: Core Memory Stack, 16K Front Panel Control Board (LED) PDP-8/E Front Panel Control Board (BULB) 16K 12 Bit Base Board (Core Control) Memory Extension and Time Share Control All documents are hardware print sets. Credit as usual goes to David Gesswein for scanning this material. Other new material includes documentation on the pdp-5 and the pdp-12. Admittedly these are off topic, but the contributor, Al Kossow, thought that highgate would be a good place to put the material! Highgate also takes your submissions: if you have any docs or software on the pdp-8 that is not included on the site, let me know and I will add it. Kevin ========================================================== Sgt. Kevin McQuiggin, Vancouver Police Department E-Comm Project (604) 215-5095; Cell: (604) 868-0544 Email: mcquiggi(a)sfu.ca

26 years, 9 months

1
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GT40

by mbg＠world.std.com

>I loved the VT11/VR17's on 11/34A's. Racal Redac used em for >cad stations for circuit board design. When I was at Worcester Polytech, I wrote a program for a class in comptuer graphics which used the VT11/VR14 (on an 11/40) to design simple logic circuits. There was a library of simple gates along one side of the screen and one used the light pen to drag a part onto the design grid and place it in position. Once all the parts were on the grid, the inputs and outputs could be connected. And there was a special input for a clocking signal, and other inputs were supplied from the front panel switches. The state of the gates was displayed in table form on screen and one could watch as the circuit operated. Pretty simple stuff, compared with *real* cad work... but it was fun, and get me a good grade (and actually got me graphics work with other departments at WPI) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

1
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IBM 3270 PC

by mallison＠konnections.com

Yeah, I checked, Jay's correct. There is only one input and it is for the 5272. The card, as I recall, is the main card and a hardwired daughter card. I was hoping to us the setup in another system. But it was obviously (when I opened the box) better left in the original configuration. It is a very nice adapter and monitor, if you can get one... -Mike ---------- > From: Jay Jaeger <cube(a)msn.fullfeed.com> > To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> > Subject: Re: IBM 3270 PC > Date: Friday, September 24, 1999 6:09 PM > > True, so long as you have the MONITOR. I believe the original > correspondent did not have the monitor, and another correspondent suggested > that an ordinary monochrome monitor would work. Not true, AFAIK. > > Jay > > At 08:19 AM 9/24/99 -0600, you wrote: > >I use my 3270 as a standard PC. The display adapter and monitor work fine > >with all software, even comes up in color with UCSD Pascal. No need to pull > >the works. > > > >-Mike > >-----Original Message----- > >From: Jay Jaeger <cube(a)msn.fullfeed.com> > >To: Discussion re-collecting of classic computers > ><classiccmp(a)u.washington.edu> > >Date: Thursday, September 23, 1999 9:06 PM > >Subject: Re: IBM 3270 PC > > > > > >>The part quoted below about the display was incorrect. A true 3270 PC used > >>a special display adapter as well as > >>a special keyboard adapter and some special expansion memory (cabled to the > >>keyboard adapter, if I recall > >>correctly). However, you can pull all of that out, and you will have a > >>more or less standard XT. You can leave the > >>coax card in, if it suits your fancy, and you have a 327x controller around > >>somewhere... 8-) > >> > >> > >>Jay > >> > >> > >>At 04:45 AM 9/23/99 -0500, you wrote: > >>>.The monitor should be a > >>>regular green or amer mono unless a different video board was used as an > >>>aftermarket item. > >> > >> > >> > >>>David Williams wrote: > >>> > >>>> Got an urge to go to a thrift I haven't been to in a while and found > >>>> what was labeled as a 3270 PC. Brought it home and opened it > >>>> up. Looking at the boards inside I'd guess it was a 3270 PC as the > >>>> label said. No keyboard or monitor. I'm guessing it used different > >>>> ones than the normal PC. It has a hard disk, but have to pull it to > >>>> see what type first and 2 half height 5.25" floppies. Not sure what > >>>> software is on the drive. Anyone tell me anything else about this? > >>>> Such as where to locate a keyboard and monitor, what each of the > >>>> boards might be, etc. I can go into some detail on the cards if > >>>> need be. Half appear to be normal drive controllers and serial port, > >>>> etc. Then there is one with a BNC connector and two others that > >>>> have a small jumper board between them. Should I even keep it? > >>>> Hmmmm.... > >>>> > >>>> Thanks. > >>>> > >>>> ----- > >>>> David Williams - Computer Packrat > >>>> dlw(a)trailingedge.com > >>>> http://www.trailingedge.com > >>> > >>--- > >>Jay R. Jaeger The Computer Collection > >>Jay.Jaeger(a)msn.fullfeed.com visit http://www.msn.fullfeed.com/~cube > >> > > > --- > Jay R. Jaeger The Computer Collection > Jay.Jaeger(a)msn.fullfeed.com visit http://www.msn.fullfeed.com/~cube

26 years, 9 months

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RL02s Available and Cabinets

by jhfine＠idirect.com

I just picked up an 11/73 from a company that will also discard the dual cabinet which contains 2 * RL02 drives. If you are going to move on this, it MUST be before the end of September. They are in Toronto and local pickup will be required. Is anyone interested? Sincerely yours, Jerome Fine

26 years, 9 months

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PDP 11/70s For Sale

by allisonp＠world.std.com

<Remember.. the *PDT* was supposedly a smart terminal (at least the <11/110 and 11/130 were little more than that) That was the plan. I found that the 11/130 I have runs RT-11 quite nicely and it's the fastest of the tu58 based systems (uses an oddball parallel interface tu58). <It is a member simply by virtue of the fact that the CPU is the same <architecture. Nothing that was done in the PRO precluded that... it <just took a little more programming to control anything since you had <to program the interrupt controller... Think of it as more flexible... runnin for the door. ;) Seriously the hardware boys seemed to be just a touch off center for the realm. Even the VT180, a very good CPM engine design they left off two sided (rev-H has it but I've never seen a real one) and that crippled disk expansion to the denser two sided media. Allison

26 years, 9 months

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PDP 11/70s For Sale

by allisonp＠world.std.com

<The only problem with that plan is that with a CPU card (say, a KDJ11-A), <memory and serial lines courtesy of an MXV11-B, and some sort of disk <controller like an RQDX3 and the power draw crowbars the power supply. <At least it has done so on every BA11-VA that I've tried... I've always run out of slots before running out of power. the 11/23 (m8186 dual) plus two MXV11s and a RQDX3 does work if you don't mind using a tu58 to boot it! <Well, they certainly aren't *typical* pdp-11s with a boot console that <can be programmed like any other, or interrupts which work like other <ones, and the console takes lots of code to emulate a VT100, that's for <sure... For the pro350, not so for the PDT11/1xx. <they also have a *64*Hz clock... In RT-11, the clock interrupt service <drops one clock tick out of every 16 -- so it only processes 60 clock <ticks a second... :-) Someday the hardware boys will get it. Allison

26 years, 9 months

1
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SOL-20

by elmo＠hotpop.com

I have just acquired a SOL-20. I will entertain appropriate trades for it for a couple days before it goes on the block. If you are going to VCF 3.0 or come thru LA, shipping can be avoided. Regards, Elmo

26 years, 9 months

1
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PDP 11/70s For Sale

by mbg＠world.std.com

>Didn't check the MicroPDP-11 book on this one. All the 11/53 boxes I've >seen either had 11/23B or the earlier no ram-nonPMI 11/73 cpu in them. >Apparently that was a common configuration or the common path for the >used boxes. in any case most of the 11/23 or 11/73 cpus work quite >nicely in that box. That may be the *boxes* which have been marked that way... which sounds like someone was mislead (or the system reconfigured without someone knowing) *NO* 11/53[+] board that I know of has EVER had an F-11 on it. They have all had J-11 (DCJ11) chips. The 11/53[+] has always been a quad width board with two serial lines and either .5Mbyte (11/53) or 1.5Mbyte (11/53+). It is known as the KDJ11-D (the -A is the dual-width 11/73 board, the -B is the quad width 11/83,84 board and the -E is the quad width 11/93,94 board). Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

4
4
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Fixing a PET?

by gwr＠easynet.co.uk

Hi guys, I'm new here, so be gentle! =;-) I'm hopefully about to acquire a PET 8032 - the first PET I've ever owned (I was six years old when they first came out). I'm told that it boots into Basic 4.0, but the boot details are shown in lower case with the odd incorrect character. Also, when typing, some characters come up on the screen differently to the ones actually typed. The vendor suggests it may just need a clean and the I/O chip re-seating - but if it's something more complicated, is it still possible to buy replacement chips? And, thinking longer-term, are replacement screens possible to find these days (e.g. are they a standard size that you can still buy off-the-shelf)? Any suggestions gratefully received! Gareth

26 years, 9 months

2
1
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PDP 11/70s For Sale

by mbg＠world.std.com

>I seem to remember it being in a Terminals/Comms handbook (which I can't >find at the moment :-(), where it claimed that the PDT11 was _not_ a >PDP11, since it didn't have a Unibus/Qbus on it. Remember.. the *PDT* was supposedly a smart terminal (at least the 11/110 and 11/130 were little more than that) >The PDP11 Architecture Handbook is inconsistent. It describes the 'Two >PDP11 Expansion Buses' but also calls the PRO300-series 'A PDP11 family >member'. It is a member simply by virtue of the fact that the CPU is the same architecture. Nothing that was done in the PRO precluded that... it just took a little more programming to control anything since you had to program the interrupt controller... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

1
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PDP 11/70s For Sale

by mbg＠world.std.com

>What about a BA11-V? That's a 4 (dual-height) Q-bus slot box. I'm sure >the backplane can be made into a Q22 one if it isn't already. Then fill >it with a CPU card, memory, serial ports and (say) a SCSI card.... Or >even use it with a TU58 (it's the same physical size as the TU58, and the >units are designed to stack). The only problem with that plan is that with a CPU card (say, a KDJ11-A), memory and serial lines courtesy of an MXV11-B, and some sort of disk controller like an RQDX3 and the power draw crowbars the power supply. At least it has done so on every BA11-VA that I've tried... The only configuration I was able to get to work was two BA11-VAs, with the Qbus jumper, CPU and MXV11-B in the first box and the RQDX3 and DELQA in the second box... And that didn't reliably power-up >At least one DEC book claims that a PDP11 has to have either a Unibus or >Qbus expansion bus, and that the PRO3xx and PDT11s are not PDP11s because >of this (for all they run the same instruction srt). Well, they certainly aren't *typical* pdp-11s with a boot console that can be programmed like any other, or interrupts which work like other ones, and the console takes lots of code to emulate a VT100, that's for sure... they also have a *64*Hz clock... In RT-11, the clock interrupt service drops one clock tick out of every 16 -- so it only processes 60 clock ticks a second... :-) Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years, 9 months

1
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SoCal TRW Swap Sat.

by jpl15＠netcom.com

Last-minute message: The monthly TRW ham radio and electronics swap meet will be held tomorrow, Saturday the 25, from 7:30 -> 11:30 Am USA/PST. From the 405 (San Diego) fwy, take the Rosecrans exit West to Avaiation, turn Left (south) and go about 1/2 mile... the Meet will be on your right, in the southernmost parking lots. Look me up: I'll be in spaces J21 and J23... Marvin will be there too. Cheers John

26 years, 9 months

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Unibus card ID help

by CLASSICCMP＠trailing-edge.com

>I've got a few unibus cards that I can't find in the various on-line >references, does someone have an early-70's handbook around that could >give me some tips? >G103 Memory voltage levels for MM11 and ME10 >G225 Current source for ME10 and MM11 >G226 XY selection switch for ME10 and MM11 >M2860 >M4801 I'm stumped by these two. >M7290 In my book, this is simply labeled "M729 for 980 nsec memory". -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 9 months

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PDP 11/70s For Sale

by allisonp＠world.std.com

<I seem to remember it being in a Terminals/Comms handbook (which I can't <find at the moment :-(), where it claimed that the PDT11 was _not_ a <PDP11, since it didn't have a Unibus/Qbus on it. Didn't say it wasn't there. Only that at that time for marketing reasons it was "improper" to call it a PDP-11. <The PDP11 Architecture Handbook is inconsistent. It describes the 'Two <PDP11 Expansion Buses' but also calls the PRO300-series 'A PDP11 family <member'. As I said. a few years later... Allison

26 years, 9 months

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RCA 1861, NTSC and a DEC VR-201

by allisonp＠world.std.com

<In any case, if there was no other problem, feeding it a mistimed signal <would most likely result in something on the screen - maybe not locked, <probably not centred. But there would be _something_. Therein lies the problem. First the levels form most of the 1861 based designs are poor or sloppy. The front and back porches are a bit wide. Likely the problem will be solved when the said cosmac get's it's circuit fixed. FYI: I have a cosmac design that has the 1861, the driver for the video circuit was an emitter follower with a series resistor and no load to ground. When hooled to a hign impedence input monitor (or with with the 75ohm load switched off) it produced no useable output. The fix was chnge the output stated to have the correct DC offset and self completing. This in the end was not a VR201 <or any other monitor> problem just a design that deliberately minimized cost/components with attendant side effects. Allison

26 years, 9 months

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Unibus card ID help

by af-list＠lafleur.wfi-inc.com

I've got a few unibus cards that I can't find in the various on-line references, does someone have an early-70's handbook around that could give me some tips? G103 G225 G226 M2860 M4801 M7290 Thanks, Aaron

26 years, 9 months

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Looking for DEC card Reader: CR11 or CM11

by mcquiggi＠sfu.ca

Hi Gang: I'm interested in finding a card reader for my pdp-11 machines. There was one advertised as available earlier this week, unfortunately it has been claimed. The CR11 and CM11 models are what I'm looking for - they're a desktop variety that would work nicely with my current machines. Anyone out there have one they will part with? Kevin ========================================================== Sgt. Kevin McQuiggin, Vancouver Police Department E-Comm Project (604) 215-5095; Cell: (604) 868-0544 Email: mcquiggi(a)sfu.ca

26 years, 9 months

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RCA 1861, NTSC and a DEC VR-201

by ethan_dicks＠yahoo.com

--- Tony Duell <ard(a)p850ug1.demon.co.uk> wrote: > OK, you are sure you're giving it 12V still (the VR201 takes its power > from the system unit when used in a standard DEC configuration). Yes. I've got a PC PSU attached via my cable (which, again, works with an Amiga 2000). I even hung a 3.5" HDD off the PSU to ensure a minimum load on the +5V line to ensure proper +12V on the +12V line. > Do you get _anything_ on the screen at all, even if you turn up the brightness > and contrast controls?. Yes. I get background signal and a retrace image if I turn it all the way up, whether the VIP is plugged in or not. > What does your composite output from the RCA VIP > look like on a 'scope? I can see some negative pulses, a stronger line at 0VDC, some schmutz that looks like video data between the sync pulses. It has the general appearance of NTSC mono data. When I attach a Commodore 1084S to the VIP, I get exactly what I expect: digital block noise (from random memory garbage in the VIP at power on) and 1" tall numbers when I tap commands on the keypad. > Can it drive the 75 Ohm input impedance of the VR201? Dunno. How can I tell? I have the VIP schematics. Is there something I can do with this? > Is there a large DC offset on the signal? How would I spot it? The sync pulses are below the 0VDC base line, there _is_ a baseline and the noisy stuff is above the base line. Is that what I'm looking for? There is a mention in the manual about tuning a resistor or two for the sake of certain brands of RF Modulators. Perhaps the signal isn't hot enough to tickle the VR-201? > The VR201s I've looked inside use a standard TDA1180/TDA1170 circuit. > They should be able to lock to 15720Hz (in fact I think I've had them locked > to 15625Hz, which is the UK TV horizontal frequency). Even if they > couldn't, there would still be something on the screen. There appears to be a beam; there is assuredly heat on the cathode, there is no VIP data on the screen. This VR201 works with my DECMate II perfectly well. It also works with an A2000 w/my custom cable. The VIP works with its own cable to another composite monitor. The only combination that does not work is my custom cable between a VIP and the VR-201; that path is what I'm trying to debug. Thanks, -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 9 months

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PDP 11/70s For Sale

by allisonp＠world.std.com

<Which series is most compact (sized for desktop or tower style) pdp An 11/53 thats a 11/23 cpu in a BA23 box. About 6Wx28Hx30D and an easy 110v outlet. With a RD52(30mb) and a RX50 floppy you can run most any PDP11 OS including unix (starting with 2.9 or 2.11). The other choice is a BA123 (end table) with a 11/23 or 11/73 in it. Fast and plenty of disk drives, not to hard on power(110V 600Wmax). If you want something really low power, a PRO350 (or 380) that's a PDP11 or a PDT11/150 (tiny and very low power, less than bigger PCs). PDP-11 line run from the really big like the 11/70 down to a single board (falcon card T-11 cpu, 2 serial, Parallel, 2kw ram, rom, one dual card!). So having a PDP-11 os some sort is very possible and they are all for the most part PDP-11s differing mostly in speed, IO and maximum memory. Allison

26 years, 9 months

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PDP 11/70s For Sale

by jfoust＠threedee.com

Before I forget, last week I saw a BA213 with a M9405 and three M9047 in it. The module database at <http://www.neurotica.com/dec-info/> is down, it appears, and I can't find another link like it right now. The unit was $20 at the UW-Madison (Wisconsin) surplus SWAP shop, open Fridays 8 to 2. - John

26 years, 9 months

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RCA 1861, NTSC and a DEC VR-201

by ethan_dicks＠yahoo.com

What do those things have in common? Apparently not much. I was attempting to lighten my load for the VCF and I ran across a small problem. I have this cable I made to use a VR201 with an Amiga. It works. I even tested it tonight to eliminate sources of failure. When I try to hook a COSMAC VIP up to it, I get nothing. The numbers (from the RCA 1861 spec sheets) look like this: NTSC 1861 @ 1.76064 Mhz 1861 @ 1.764000 Mhz 1861 @ 3.579545/2 -------- ------------------ ------------------- ----------------- Line 15750 Hz 15720 Hz 15750 Hz 15980 Hz Field 60 Hz 60 Hz 60.11 Hz 60.99 Hz The xtal in the VIP is 3.521280 Mhz (2 x 1.76064 Mhz). It seems that the VR201 is sensitive to a 30 Hz difference in the horizontal freq. Barring the chance that I can locate a 3.528 Mhz xtal before the VCF, am I hosed here? I had hoped on using either my VR201 or one brought to the show by a kind soul. As it stands now, I'll have to hope for a kind soul to help me with a standard NTSC monitor (I've just tested the VIP with a more ordinary Commodore 1084S). Can any video guru's shed any light on my dilemma? Is the VR201 that sensitive? Is there a way to get around this? Thanks, -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 9 months

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PDP 11/70s For Sale

by pete＠dunnington.u-net.com

On Sep 24, 8:48, allisonp(a)world.std.com wrote: > > the RAM (typically 1.5MB) and its performance is more like an 11/73 than an > > 11/23. You'd need BSD 2.11 to have any hope of MSCP support for RDxx or > > RX50. > > Pete, > > You forgot to tell him about PUPS! sheesh, even if you not into unix you > need to add that to your PDP-11 list of good information sources. > > ...I'm not home so I don't have the address. ;) Oops, yes, that's a bit of an omission... see http://minnie.cs.adfa.edu.au/PUPS/index.html As (I think) Allison knows, I have an 11/83 running 2.11BSD and an 11/23 running Seventh Edition, as well as several other 11s. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 9 months

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PDP 11/70s For Sale

by pete＠dunnington.u-net.com

On Sep 24, 8:46, allisonp(a)world.std.com wrote: > Subject: Re: PDP 11/70s For Sale > > No, an 11/53 isn't an 11/23, it uses a J-11 on a board which also includes > > the RAM (typically 1.5MB) and its performance is more like an 11/73 than an > > 11/23. You'd need BSD 2.11 to have any hope of MSCP support for RDxx or > > RX50. > > Didn't check the MicroPDP-11 book on this one. All the 11/53 boxes I've > seen either had 11/23B or the earlier no ram-nonPMI 11/73 cpu in them. > Apparently that was a common configuration or the common path for the used > boxes. The microPDP-11/53 uses a specific 11/53 CPU board design with a J-11, SLUs, memory, and boot ROMs on one board. There's no reason you couldn't put an 11/23B in there instead, but 11/53s were never made with F-11 processors, so the ones you've seen must have been downgraded -- or have had the badge replaced :-) The cabinet is of course the same BA23 as the microPDP-11/23 and microPDP-11/73. > in any case most of the 11/23 or 11/73 cpus work quite nicely in > that box. They certainly would, of course. -- Pete Peter Turnbull Dept. of Computer Science University of York

26 years, 9 months

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Parasoft Express released for FREE

by rmeenaks＠olf.com

Hi, I talked to parasoft and they agreed to freely release express for non-commercial use. Unfortunately, they lost the binaries a long time ago. So, does anyone have a copy for the following architectures: Transputers Parsytec Meiko Once I get it, I'll post a copy on my webpage at http://members.xoom.com/transputer BTW, if you dont know what express is, it is a communication library for parallel computers (similar to MPI & PVM) and it supports a wide range of computers. A lot of interesting software was ported to express at one time (but nowadays, everything is MPI & PVM). Ram -- ,,,, /'^'\ ( o o ) -oOOO--(_)--OOOo------------------------------------- | Ram Meenakshisundaram | Senior Software Engineer | OpenLink Financial Inc | .oooO Phone: (516) 227-6600 x267 | ( ) Oooo. Email: rmeenaks(a)olf.com ---\ (----( )-------------------------------------- \_) ) / (_/

26 years, 9 months

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PDP 11/70s For Sale

by danburrows＠mindspring.com

Sounds like a few people need to do a subfeed like I did for the test beds here. 100A dedicated panel mounted directly behind the 9 bay 6 foot tall rack. That panel will one day be fed from the 10KVA UPS I just have to get new batteries for. This sub feed is off a 200A feed that is for my office only. Dan -----Original Message----- From: jpero(a)cgocable.net <jpero(a)cgocable.net> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, September 23, 1999 10:13 PM Subject: Re: PDP 11/70s For Sale > From: Dave McGuire <mcguire(a)neurotica.com> > To: jpero(a)cgocable.net > Subject: Re: PDP 11/70s For Sale > Date: Thu, 23 Sep 1999 21:47:52 -0400 > On Thu, 23 Sep 1999, you wrote: > >Well, what's the physical requirements of that 11/70 machine > >(functional state, power etc?) > > Well, the 11/70 processor itself is a chassis that takes up half of a 6' > rack. It pulls out and the boards go in vertically into the left side, > co-planar with the front of the rack. Groan...to have complete system needs one rack... that pretty large by my space standards. But my eyes lits up on that 70 lights... whew! Which series is most compact (sized for desktop or tower style) pdp or vax and only needs one wall power cord to run whole thing (including storage built in). Current draws snipped. Even I did manage to bull through my parents and did gotten that 11/70, breakers will trip every time I power just the cpu itself up. I throw out flames at my parents every time they accidently tripped the breaker with that ac unit making my computer go out, all plugs in my bedroom and few in living room including my alarm clock and shop computer go dead. I hated this apt even it's located in nice location, nice people. But I do have 2 negatives about this apt, floor is very bouncy for a uneven cement floor (too thin?) and too few breakers on too many circuits attached. Landlord turned down the request to put insolated circuit and a breaker just for ac even we did pay the electrican ourselves. Lots of space in that breaker box, 5 spaces left actually. > Well worth it, though...upwards of seventy LEDs on that front panel, all > merrily blinking away...fast machine, too. An excellent design. I *will* own > another one someday. Thanks. :-) Wizard > > -Dave > >

26 years, 9 months

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7900A drive: 1 , Me - 0 also - 7908 available possibly? + email address change...

by ethan_dicks＠yahoo.com

--- Jay West <jlwest(a)tseinc.com> wrote: > Any cloth I've tried around the > house doesn't seem to be "lint-free", and leaves many little threads and > stuff behind. Has anyone found any common cloths that don't do this? I was > wondering about an old undershirt, etc. Ideas? Don't use an "around the house" cloth. The right tool for the job are laboratory "Kimwipes". They are non-woven, truely lint-free wipes for labware. I know of FE's who have cleaned RK packs with a squeeze bottle of isopropyl (95%+ IIRC, not 70%) and Kimwipes. Besides a chem lab, I don't know where to get them, but they are what you want. I wish I had a box. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 9 months

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Free: 8 Copies of 9/95 BYTE 20th Anniversary Issue - GONE

by DD950＠prodigy.net

-----Original Message----- From: Mike Ford <mikeford(a)socal.rr.com> >>They're gone. Thanks for the fast responses. > >MAN! I'd hate to see what would happen if someone dropped a box of donuts >in front of this group. ;) > Or, your wallet! :-) Jim Rossbach, Tonkin Gulf Yacht Club, www.TonkinYachts.cjb.net The astonishing thing was that the newsperson managed to say "Authorities *suspect* alcohol was involved" with a straight face.

26 years, 9 months

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7900A drive: 1 , Me - 0

by jlwest＠tseinc.com

Here's another installment in the ongoing HP7900A drive saga (yes, it's a plea for advice and/or sympathy <grin>) Installed new (refurbed) lower heads and new lower platter. Recleaned inside of drive. Powered up, put in new removable cartridge. Hit load switch and waited 25 seconds, then hit unload. Did this a few times (the blowers and drive spins up, but the heads don't load for 30 seconds - did this to get any remaining particles out). Removed cartridge, powered down, removed covers and reinspected everything inside. All looked well (including heads, which were fully retracted). So, this time I powered up and hit load. Waited 30 seconds, heard the heads move out to cylinder 0. Ran drive like this for about 3 minutes, no problem. Hit unload. When I removed the removable cartridge, I noticed the heads weren't quite retracted all the way. They were well off the media, but not all the way back home (the heads weren't touching each other, but they were close). Manually pushed the heads back, rechecked everything I could find. Repowered up the drive, after 30 seconds the heads loaded. Drive ready lite comes on and ran for about 15 minutes. No HDI sounds at all. I was elated. Hit unload, and after about 20 seconds heard very soft HDI. This time I left the cartridge in, powered everything off, removed the covers, and this time the heads weren't retracted at all. They were sitting right on the media. Strange thing is, there's no marks on the media, the lower heads I replaced look pristine, and the upper heads have only the very slightest indication of oxide. Gee - perhaps this is why the drive originally had a head crash before I got it? I've been through the "theory of operation" text and flowcharts. Several things confuse me. First, I thought that hitting the unload switch was pretty much of an immediate voice coil retraction - I didn't think this went through all the normal logic circuits. Second, the coil can't be completely shot I wouldn't think, because as I understand it the drive ready light won't even come on unless the positioner moves out to cyl 0 correctly. Before I replaced the heads and media, I don't THINK I had this problem, I think I would have noticed if the heads weren't retracting before. But, I can't imagine that anything I did related to replacing the lower head set and the lower platter would have anything to do with this. Input anyone????? TIA! Jay West

26 years, 9 months

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PDP 11/70's for sale

by mmcfadden＠cmh.edu

All of the PDP 11/70's I have seen seemed to sprawl to fit all of the available space with a few peripherals on the floor or on a cart nearby. The PDP 11/70 that I used the most between 1977 to 1982 was configured in 4 bays and a RP04. Bay 1 CPU with 2 8" floppy drives above Bay 2 expansion chassis with 2 DZ11 terminal multiplexors and TU58 cassette tape Bay 3 4 RK05 drives Bay 4 TU10 tape drive The RP04 sat next to the CPU. For RP04 backups we carried the disk packs to another building and made a copy. Initially the system disk was one of the RK05 drives. Each users programs were on another RK05 and our data was swapped in and out on the two remaining RK05's. When we first received the RP04 we configured it to look like multiple RK05 drives to fit our software and database scheme. We considered the 11/70 a "hot machine" especially after the PDP 11/35 we had originally. It was a race horse and had 320 K words of memory!!! We had 6 programmers, 1 operator, 2 Versatec plotters and a Printronix P300 on the system. Each user had their own VT52!!!! Later we had several VT100's. Compiles took less than 1 minute. OH for the glory days. We collected microbiology data from PDP 11/05's and PDP 11/04's on cassette tape until we started using the 8" floppies. Each PDP 11/05 or 11/04 had a VT52 with an internal wet paper printer. Mike McFadden 026/029 card puncher, assembly programmer, Fortran programmer, datatrieve programmer, hardware guy, VT05 user, VT52 user, VT100 user, PDP 15 user, PDP 11/20 user, PDP 11/50 user, PDP 11/35 user. Interdata 7/32 user, Interdata 8/32 user, Old computer user

26 years, 9 months

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IMSAI switches at VCF?

by edick＠idcomm.com

You're aware, aren't you, that you can get them as replacement parts via www.imsai.net? Dick -----Original Message----- From: Bill Sudbrink <bill(a)chipware.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, September 24, 1999 8:28 AM Subject: IMSAI switches at VCF? >Is anybody going to be selling replacement IMSAI >switches at VCF? > >

26 years, 9 months

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IBM 3270 PC

by mallison＠konnections.com

hat's interesting because mine has a 10MB drive buit in. I didn't think they came without HDs because they needed the terminal software, etc... -----Original Message----- From: David Williams <dlw(a)trailingedge.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Friday, September 24, 1999 8:42 AM Subject: Re: IBM 3270 PC I think I've seen the monitors before too. I may have seen the keyboard once long ago. But I already have an IBM PC which I use to play around with CP/M-86 so wasn't sure if I wanted to keep this. Of course the PC is a PC and not an XT. It doesn't have the hard drive on it so maybe I'll use this one as a CP/M-86 machine now. On 24 Sep 99, at 8:33, Mike Allison wrote: > I sometimes see the monitors. They're VERY obvious. They are large with > an oversize square-ish case and a built in swivel stand. I'm not looking > at the monitor right now, so I forget what the plate says on it. But it > also has a big red toggle switch. You can see them from miles away. > > Again, I believe there are other adapter plugs on the board, so other > monitors would work... > > I've been running CPM-86 as well as other weird stuff on it. It's real > IBM so that early software runs well and correctly on the 3270... > > -mike ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com

26 years, 9 months

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Corona Data System double floppy IBM Compatible PC (fwd)

by siconic＠jasmine.psyber.com

The Corona Data Systems portable is a bit historic in that they copied the IBM PC BIOS without license from IBM and got sued out of existence. If anyone wants this then please contact the owner directly. Reply-to: jfenker(a)teleport.com Sellam Alternate e-mail: dastar(a)verio.com ------------------------------------------------------------------------------- Puttin' the smack down on the man! Coming this October 2-3: Vintage Computer Festival 3.0! See http://www.vintage.org/vcf for details [Last web site update: 09/17/99] ---------- Forwarded message ---------- Date: Wed, 22 Sep 1999 00:18:57 -0700 From: John Fenker <jfenker(a)teleport.com> To: donate(a)vintage.org Subject: Corona Data System double floppy IBM Compatible PC I have a Corona Data System PPC 22 portable computer about the size of a small suitcase with a built-in 9" monitor [like an Osborn with a slightly larger screen]. If you folks would like to have it, I will send it. I may be able to dredge up an owner's guide or the like, if you think it would be worth the effort. I haven't had the heart to discard it; it had the most readable display I have ever had for word processing. I used Multimate, of course, to go with the Wang system at work. If you wish, I'll grub around for the program floppies for Multimate. Let me know at your convenience what to send and where. My wife will be so thrilled! John A Fenker P.O. Box 6278 Vancouver, WA 98668 jfenker(a)teleport.com

26 years, 9 months

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IMSAI switches at VCF?

by bill＠chipware.com

Is anybody going to be selling replacement IMSAI switches at VCF?

26 years, 9 months

2
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PDP 11/70s For Sale

by ethan_dicks＠yahoo.com

--- CLASSICCMP(a)trailing-edge.com wrote: > > But I have no idea how big this 11/70 would be? > > A couple of points: > > 1. The 11/70 CPU itself weighs 400-500 pounds, in its cabinet with > power supplies. Several fairly hefty guys can roll a CPU around > and tip it into a trailer, for example. (Hi Elmo!) It's lots of fun, trust me. > 3. Memory boxes weigh about 80-100 pounds each. A fully equipped > system with core memory boxes (2 Mwords of core) requires 8 memory > boxes. Solid state memory is more dense, and depending on exactly which > generation of memory boards you might only need two memory boxes > for a usable configuration. Mine have a single BA-11-sized box with 16 256K boards (full of 4116 chips) in a second cabinet. > And Massbus disk drives (as were mentioned in the original post) > are the size of a washing machine and weigh several hundred pounds. > You'll need at least two disk drives for any real usage. I've got Systems Industries SI-9900 controllers (5" x 19" x 30") and Fuji Eagles. One short cab is enough to hold 800Mb - 1.2Gb. Real DEC RM03's are 67Mb and the same volume. -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 9 months

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Bursky S-100 book on ebay.

by bill＠chipware.com

In case you missed it, it sold for 109.50. I bid on it but didn't win. Before the auction, I was hoping that nobody would show up at the VCF with a stack of them for sale. Now I hope somebody does...

26 years, 9 months

1
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need a 19" rack in Houston

by KFergason＠aol.com

Howdy, This is sort of specific to Houston, so everyone else can delete now. I have a friend who is need of a 19" rack. Doesn't have to be anything fancy, just a good sturdy rack. Where would be the best place to find/scrounge/whatever one of these beasts? (without calling rittal and paying big bucks) Any hints appreciated. Kelly KFergason(a)aol.com

26 years, 9 months

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RCA 1861, NTSC and a DEC VR-201

by ethan_dicks＠yahoo.com

--- allisonp(a)world.std.com wrote: > But vr201 is not NSTC timing or scan rates. Sure it is. I'm driving this one from an Amiga 2000, right off the mono RCA jack on the back. I made a cable with a DB-15 connector for the VR-201 end and an RCA jack and HDD power socket for the Amiga end. I fire up the Amiga to see the animation of the kickstart disk self-inserting. > No way. It's not the 30hz in frequency it's the serperate sync and > different front and back porch timing. Front and back porch timing I can perhaps see. There is no seperate sync on a VR201. It has a pin for Mono Composite In. I'd post the pin-out, but it's at home and I'm not. > It's a misapplication, Vr201 is not a generic monitor. I realize that the VR-201 is not generic, but it is handy when I need a mono monitor in a semi-portable situation (I once took my A2000 in the Bomac tower case to an Amiga show in Columbus and ran it with this VR-201 to save space) -ethan ===== Infinet has been sold. The domain is going away in February. Please send all replies to erd(a)iname.com __________________________________________________ Do You Yahoo!? Bid and sell for free at http://auctions.yahoo.com

26 years, 9 months

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PDP 11/70s For Sale

by CLASSICCMP＠trailing-edge.com

>Didn't check the MicroPDP-11 book on this one. All the 11/53 boxes I've >seen either had 11/23B or the earlier no ram-nonPMI 11/73 cpu in them. Well, then, none of those were actually 11/53's :-). It reminds me of the folks who have a MicroVAX system living inside a BA23 or BA123 with the "Micro PDP-11" badge on front of it. The badge doesn't mean a damn thing, it's what is living in the box that counts! Tim.

26 years, 9 months

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PDP 11/70s For Sale

by CLASSICCMP＠trailing-edge.com

>Before I forget, last week I saw a BA213 with a M9405 and three M9047 >in it. M9047's are grant continuity cards (no circuitry, just PC boards with pins on the edge connector jumpered together to pass interrupt and DMA signals to the next slot.) A M9405 is a Q22-bus cable connector. This is what you use to hook multiple Q-bus chassis together into a multi-box system. On the other end of the cable you need a M9404. For information on connecting multiple Q-bus systems together, telling you which variants on the M9405 and M9404 cards you'll need for specific CPU/backplane combinations, see Micronote 29, "Q-bus Expansion Concepts", at http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/microno… > The module database at <http://www.neurotica.com/dec-info/> >is down, it appears, and I can't find another link like it right now. You want the "Field Guide to Q-bus and Unibus Modules", at http://metalab.unc.edu/pub/academic/computer-science/history/pdp-11/hardwar… -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

26 years, 9 months

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