test-drb

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COMPUTERS: THEIR IMPACT ON SOCIETY, AFIPS Conference Proceedings, Volume 27, Pa

by COURYHOUSE＠aol.com

extra copy no DJ ex lib tight binding unmarked text pages aside from library stamps etc trade or? repy offlist Ed# SMECC www.smecc.org _ COMPUTERS: THEIR IMPACT ON SOCIETY, AFIPS Conference Proceedings, Volume 27, Part 2, 1965 Fall Joint Computer Conference. _ (https://www.amazon.com/COMPUTERS-Conference-Proceedings-Computer-Conference… omputers+their+impact+on+society) 1967

9 years, 5 months

vt100 terminfo with padding for an actual vt100?

by billdegnan＠gmail.com

On Sep 5, 2016 12:05 PM, "Peter Coghlan" <cctalk at beyondthepale.ie> wrote: > > Fritz Mueller wrote: > > > > > On Sep 4, 2016, at 6:08 PM, william degnan <billdegnan at gmail.com> wrote: > > > > > > Even better, I found this post, this is my how to attach a vt100 to a VAX > > > 4000, you can apply to most any case > > > > > > Hi Bill, > > > > Thanks for you help! > > > > I will say that I have the getty running fine, baud rate, serial format, etc. > > all okay. Works just fine at 1200 baud and below. At higher baud rates, it > > seems like the vt100 is dropping some characters or bits after certain > > escape sequences, even with xon/xoff flow control enabled, so I?m *pretty* > > sure the issue is just with the padding values in the vt100 terminfo spec? > > > > I've got a VT102 Video Terminal User Guide (EK-VT102-UG-003) which contains > a table of fill characters required for different control codes / escape > sequences / display characters at each possible baud rate. Here's what it > lists for 19200 baud: > > 324 IND, LF, NEL, RI (Smooth Scroll) > 191 DECCOLM > 190 DECALN > 144 ED (132 Col) > 104 ED (80 Col) > 32 IND, LF, NEL, RI (Jump Scroll) > 6 EL (132 Col) > 4 EL (80 Col) > 7 DECINLM > 2 All others except RIS and DECTST > > The appendix also seems to hint that the VT100 has different requirements so > this may not be very useful to you but it might give you a rough idea. > > Regards, > Peter Coghlan. The link I provided has exactly what keystrokes and settings to use for 8/n/1 and 19200, plus a link to the vt100 manual. VT102 is not the same. B

9 years, 5 months

Interact Model One Software

by davidpopovich＠rogers.com

Did you ever get your interact running? I can help you with cassettes if you need. There is also a way to use a wav file and play through an MP3 to cassette adapter Let me know Sent from my iPhone

9 years, 5 months

RQDX3 as secondary MSCP controller

by Mark＠Misty.com

Hi, Last year I rescued a dual-wide 8-position q-bus backplane. I added the wire wrap to convert it from 18 to 22-bit, and now can boot BSD2.11 from CMD/CQD SCSI controller and CF card at DU0, via an AztecMonster CF-SCSI adapter. If I remove the SCSI controller, I can boot XXDP >from an RQDX3 connected floppy drive at DU0. My CPU is an M8192 from the scrap-card guy on e-bay, and I'm using an M7195 SLU/ROM card for console. It's got 23-14534/23-146E4 ROMs. I'm using a 2MW Clearpoint RAM card. I'm fabricating a cool desktop flexiglass case, so I can put the tiny-pdp11/73 on the desk at work. The difficulty I am having is I would like to configure the system with both MSCP controller cards installed, so I can boot from either SCSI or floppy, preferably with the SCSI still starting at DU0 so my BSD2.11 CFs remain portable to my other system. I changed the W1-W11 jumpers on the RQDX3 for 17760334 secondary MSCP address. And, I installed W12 to start at MSCP unit number 4. I used the menu on the SCSI controller to set it for DU0-DU3-only device mappings (SCSI ID 0-3). My understanding is each controller needs the different CSR, and non-overlapping MSCP unit numbers. I confirmed I (finally) got the RQDX3 address jumpers because the bootrom memory map now displays 17760334-17760336 as in use, as well as 17772150-17772152 for the SCSI controller. I was expecting that I'd now be able to boot from the floppy at DU4 (BOOT> DU 4), but after a long pause, I get ?BOOTROM-F- DU 4 device error. I also tried "BOOT> 17760334 DU 4", but still no joy. Another oddness I noted was that with my original RQDX3 config, if I plug the M7516 ethernet card in, that breaks booting from floppy. Are there some other jumper changes I need to make on the RQDX3? Does anyone have any other suggestions about what I might be doing wrong? Mark -- Mark G. Thomas (Mark at Misty.com), KC3DRE

9 years, 5 months

Power Supply capacitor physical size

by jrr＠flippers.com

On 09/03/2016 10:07 AM, Adrian Graham wrote: > On 03/09/2016 17:39, "Jon Elson" <elson at pico-systems.com> wrote: > >> On 09/03/2016 10:56 AM, Noel Chiappa wrote: >>>> From: Jon Elson >>>>> needs new caps since one of the 1000uF 16V ones has bulged badly. >>>>> ... >>>>> If I go up to 25V I can get 16mm diameter which is the size of the old >>>>> ones. >>>> Capacitors that are subjected to high AC ripple current may need the >>>> large surface area for cooling. >>> Interesting point - but in his particular case, he should be OK replacing the >>> old 16V cap with a similar-sized modern 25V cap? >>> >>> >> Similar size - then no problem! But, some new cap types are >> VASTLY smaller than the caps from 40 years ago. > Hence my question, I'll stick with the same size but higher voltage. > > Cheers! > You do have to consider where in the circuit the capacitor is. If this is a switching power supply (as I suspect) then if the cap is after the switching transformer it MUST be a low ESR, high temp cap - otherwise it won't last very long. If this is on the primary side and is simply filtering the input rectified AC then ESR is not as big a problem, but you need a good physical size if the switching supply puts out a fair bit of current due to heating effects of low frequency ripple. So, it all depends. For general repair I would get the best grade of capacitor - say Panasonic - with a nice low ESR and away you go. John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out"

9 years, 5 months

Data Genera MPT/100

by lbickley＠bickleywest.com

I have a nice, clean DG MPT/100 I'm in the process of restoring. As you might expect, I contacted Bruce at "Wild Hare" to see what documentation and software he had for the critter. He was able provide some helpful PDF documentation - but NO schematic or software. Without software, the MPT/100 is essentially useless. If anyone has the 5.25" floppy system and/or diagnostic diskette sets for this workstation I'd really appreciate images of same. If you have the floppies, but no images, and you lend me your floppies, I'll make images and make them publicly available and return your floppies (assuming you want them back). If by some stroke of luck you have the schematics for the MPT/100 (DG part numbers: Mainboard 001-002963 and Keyboard 001-002688) I could really use them :) The MPT/100 contains the DG microNOVA mN602 CPU and 64K of system RAM plus video memory. Software for the MPT/100 includes a set of Diagnostic diskettes and the MP/OS system diskettes. Regards, Lyle -- 73 AF6WS Bickley Consulting West Inc. http://bickleywest.com "Black holes are where God is dividing by zero"

9 years, 5 months

Wanted - two 27C010-capable EPROM emulators

by classiccmp＠philpem.me.uk

Hi there, Does anyone have a pair of spare EPROM emulators which are capable of emulating 27C010 EPROMs? Ideally two identical ones, but that's optional. I'm trying to reverse-engineer a Securicor Datatrak MkII navigation receiver and build a signal generator which can emulate a chain of Datatrak transmitters. I'm part of the way there, but I've hit something of an impasse: * My emulator isn't good enough to run the firmware on a PC (it crashes when the RTOS starts to boot). * My knowledge of the hardware is full of holes (especially the simple-but-custom ASIC). Porting a monitor ROM using EPROMs would take a fair while, even with the HP16700A to use as a "debugger". I'd like to try patching the firmware, but with bare EPROMs that'll take a while to get right. I could swear these things were as common as housebricks on ebay a year or so ago, but now they're not quite so common... Incidentally, if someone (preferable in the EEA) has a spare HP 16717A acquisition card (for the 16700A series logic analysers) for sale, I'd be very interested in getting another one -- my second 16717A seems to have died while in storage, and spying on the 68k has eaten up all the pod inputs on my one working card. Thanks, -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/

9 years, 5 months

Apple IIgs and (separately) Big Apple collection, Baltimore MD area (USA)

by brad＠facefault.org

Both these locations are NW of Baltimore, Maryland. I have no relationship with either seller but am willing to do in-person recon for people on this list if required. Large lot of Apple stuff, $1200 Mostly Macs but a good amount of Apple II stuff (including a //c with all original boxes and paperwork) Westminster, MD http://baltimore.craigslist.org/sys/5763302040.html Apple IIGS, $100 3.5 and 5.25 floppy drives, monitor, keyboard, mouse New Windsor, MD http://baltimore.craigslist.org/sys/5746461980.html ? Brad Ackerman N1MNB PGP: 0x9F49A373 brad at facefault.org <*> http://bsa.smugmug.com/

9 years, 5 months

DCS 2400 or System 2400?

by bobalan＠sbcglobal.net

I found a simple manual for a "System 2400" 24 bit computer. Can be downloaded here: http://dvq.com/docs/dcs2400o.pdf There's a reference to "dcs 2400" and on the title page, "Digital Computer" from the rep. Gene Baumgardner. Does anyone have more info on this computer, or the company who made it? It looks like an interesting system. -Bob -- Vintage computers and electronics www.dvq.com www.tekmuseum.com www.decmuseum.org

9 years, 5 months

Power Supply capacitor physical size

by jnc＠mercury.lcs.mit.edu

> From: Jon Elson >> needs new caps since one of the 1000uF 16V ones has bulged badly. >> ... >> If I go up to 25V I can get 16mm diameter which is the size of the old >> ones. > Capacitors that are subjected to high AC ripple current may need the > large surface area for cooling. Interesting point - but in his particular case, he should be OK replacing the old 16V cap with a similar-sized modern 25V cap? Noel

9 years, 5 months

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