test-drb September 1999

test-drb@ccmp.vtda.org

160 participants
610 discussions

by peter.pachla＠vectrex.freeserve.co.uk

Hi again, I've been unable to send e-mail reliably for a while due to system problems....so anyone waiting for email (Sellam in particular) you'll be receiving something during the next 24 hours or so. Anyway, I'm after a couple of items which I was hoping someone in the UK could help me with. First of all I've gotten the Apple bug again and want to get my Apple /// going. It seems to work, but without a set of boot discs it's just so much scrap....so can anyone point me at a source of said discs please? Also, I have an HP-150 which I'm after a hard drive for. I did have a couple of offers from the US last year, but due to system problems I lost touch with the person concerned....that said shipping would've made the cost prohibitive. So, does anyone in the UK have a unit that's up for grabs? Thanks. TTFN - Pete. -- Hardware & Software Engineer. Sound Engineer. Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC) peter.pachla(a)wintermute.org.uk | peter.pachla(a)virgin.net | peter.pachla(a)vectrex.freeserve.co.uk | peter.pachla(a)wintermute.free-online.co.uk | www.wintermute.free-online.co.uk --

24 years, 6 months

IBM 3270 PC

by mallison＠konnections.com

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 -----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 8:21 AM Subject: Re: IBM 3270 PC So what people are telling me is this is basically just an XT to me unless I have something that uses 3270 terminals to hook it up to. Then I can use it as a terminal. That is if I can get the special keyboard and monitor. Is that right? Well I did just give a bunch of furniture in my storeroom to my brother which freed up some space. I guess I could hold on to it for a while just in case something turned up. Hmmmm. On 23 Sep 99, at 22:05, Jay Jaeger wrote: > 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-) ----- David Williams - Computer Packrat dlw(a)trailingedge.com http://www.trailingedge.com

24 years, 6 months

IBM 3270 PC

by mallison＠konnections.com

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 >

24 years, 6 months

Opening the Sun Lunchbox (411 Style Case)

by rkaplan＠accsys-corp.com

Hi - I wonder if someone could help me - I have two questions. I recently acquired a SPARCStation IPC. I have it up and running. The IPC's peripherals come in these lunch box style cases, "411"'s. 1. Can someone tell me how to open these cases? 2. If I have a Seagate SCSI Drive, would that be compatible with the IPC? Thanks in advance for any help. Randy

24 years, 6 months

RCA 1861, NTSC and a DEC VR-201

by pete＠dunnington.u-net.com

On Oct 1, 1:28, Tony Duell wrote: > Indeed (although occassionally you get a board where almost every > resistor is one of the strange E96 values for not really good reason). And surprisingly often in an RC circuit where the capacitor is +/-20% tolerance :-( > I am also convinced that a lot of transistors are chosen because that's > what the designer happened to have in stock :-). Yes there are critical > ones, but I could tell you some good stories about substituting all sorts > of transistors with 2N3904s and 2N3906s and still having the device work > _perfectly_. There are other transistors besides 2N3904s and 2N3906s? You mean BC109/184s, right? :-) -- Pete Peter Turnbull Dept. of Computer Science University of York

24 years, 6 months

Media interchange sillinesss (Was: floppy controller IC (was Re:

by edick＠idcomm.com

Well. . . it wouldn't have made much sense for the folks who made media to admit that they were merely charging more for the media marked "double-sided" when they were alike in every other way. It seemed that the only real difference in many cases was that some diskettes simply were priced higher. The old 8" drives required you punch holes in the appropriate places and cover the old ones if you used "single-sided" media in a 2-sided drive, having punched the hole, which was the only difference. Since they were available, this swapping of media from one application to another happened all the time where I did much of my work back in the mid-80's, and I'm not referring to merely a few dozen of each drive type, as we were testing and qualifying drives by the thousands. That was pretty boring work and, seeing lots of different media, it became obvious when there really wasn't a difference other than the label. Dick -----Original Message----- From: Chuck McManis <cmcmanis(a)mcmanis.com> To: Discussion re-collecting of classic computers <classiccmp(a)u.washington.edu> Date: Thursday, September 30, 1999 11:55 AM Subject: Re: Media interchange sillinesss (Was: floppy controller IC (was Re: >Fascinating stuff, the old "HD/DD/SD" debate rages even today. Fortunately >half of the conversation gets filtered on this end. > >Fred's absolutely correct. > >I can add only one Factoid that was true in 1986 which was that Sony and >Verbatim had both admitted that they were only made double sided diskette >media and the single sided disks were in fact double sided capable. But >_nobody_ ever claimed they used a single emulsion for both HD and DD disks. >For formats where the emulsion was the same for SD vs DD disks they did use >the same media. > >--Chuck

24 years, 6 months

Freguson Big Board and Big Board II

by edick＠idcomm.com

Have any of you guys got definitive and detailed information about these early 1980's single-board computers? I've got a pile of them with very little doc and none on the BB-II. I'd like to determine whether any or all of these babies work before I offer to give away stuff that's totally useless because it's broken. Several of these have been hacked extensively and I'd like to restore them to their minimal but functional configuration. Further, the BB-II has a SASI interface which would, if it worked, help me to sift through a pile of SASI bridge controllers. All in all, that would be a REALLY big help. I also have come onto rumors that there are published hacks to the BB-I which bring it up to speeds comparable with the -II version. Any help with that would be appreciated as well. thanx in advance, Dick

24 years, 6 months

ENIAC book

by yoda＠isr.ist.utl.pt

Hi. I've just finished reading the book "ENIAC" by Scott McCarthey, and loved it. Has anyone also read it? Any comments? Cheers, -- *** Rodrigo Martins de Matos Ventura <yoda(a)isr.ist.utl.pt> *** Web page: http://www.isr.ist.utl.pt/~yoda *** Teaching Assistant and MSc Student at ISR: *** Instituto de Sistemas e Robotica, Polo de Lisboa *** Instituto Superior Tecnico, Lisboa, PORTUGAL *** PGP fingerprint = 0119 AD13 9EEE 264A 3F10 31D3 89B3 C6C4 60C6 4585

24 years, 6 months

PDP-11/45 documents

by cmcmanis＠mcmanis.com

All, A couple of people have asked what 11/70 docs I have, turns out they were 11/45 docs. Perhaps that is better :-) This is what I have: DEC-11-HIAB-D PDP-11 INTERFACE MANUAL SECOND EDITION DEC-11-HRFD-D RF11/RS11 DECdisk System Manual EK-KD11A-MM-001 KD11-A processor maintenance manual DEC-11-HTMAA-D-D TM11 DECmagtape system EK-TU10-TM-001 TU10 DECmagtape master system manual DEC-11-HKBB-D KB11-A central processor unit maintenance manual EE-11040-TM-002 PDP 11/40, -11/35 (21" chassis) System Manual DEC-11-H45C-D PDP-11/45 and PDP-11/50 system maintenance manual EK-11045-MM-007 PDP-11/45, -11/50, -11/55 system maintenance manual EK-1145-OP-001 PDP-11/45, 11/50, 11/55 system users manual EK-KE11E-OP-001 KE11-E and KE11-F instruction set options user manual EK-KT11D-OP-001 KT11-D memory management option users manual EK-MF11U-MM-003 MF11-U/UP core memory system maintenance manual EK-MS11A-MM-006 MS11-A,B,C memory systems maintenance manual EK-MS11A-OP-001 MS11-A,B,C memory systems users's manual DEC-11-HMSB-D PDP-11/45 MS11 semiconductor memory systems maint. manual EK-MF11U-PM-001 MF11-U/UP Core Memory Preventative Maintenance EK-11035-OP-001 PDP-11/35 (BA11-DA, DB 10 1/2" mounting box) system users manual A manilla folder of stuff on the PC04/PC05 punch What I really want/need is the VT340 PROGRAMMERS MANUAL (the big thick one that talks about ReGIS graphics and Sixels and all that stuff). So if you've got a VT340 manual and one or more of the above manuals is on _your_ "gotta have it" list. Send me email. (Or a VT340-G2 would be ok too :-) --Chuck

24 years, 6 months

Opening the Sun Lunchbox (411 Style Case)

by KFergason＠aol.com

might be a screw in the upper back center. take that out. towards the back on each side in the upper piece is a catch. push the case in at these points and lift up. now take it outside and blow the dust out. ( i dunno, every IPC and IPX I have opened was real dusty) any scsi drive should work. if it is a Barracuda, i would be careful about installing it internally. heat and power and all that. might work though, i've seen it done. Kelly In a message dated 9/30/99 10:40:44 PM Central Daylight Time, rkaplan(a)accsys-corp.com writes: > Hi - > > I wonder if someone could help me - I have two questions. > > I recently acquired a SPARCStation IPC. I have it up and running. > The IPC's peripherals come in these lunch box style cases, "411"'s. > > 1. Can someone tell me how to open these cases? > 2. If I have a Seagate SCSI Drive, would that be compatible with the > IPC? > > Thanks in advance for any help. > > Randy >

24 years, 6 months

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test-drb September 1999