test-drb

test-drb@ccmp.vtda.org

101090 discussions

RT-11 MACRO V5.05 Y2K crash 4-Mar-2008 and fix

by jhfinedp3k＠compsys.to

>paramucho wrote: >MACRO V5.05 crashed on 4-Mar-2008. > >It's a coding bug. MACRO was bit clearing a 5-bit rather than 4-bit >field for the month. The fix: > >Loc Old New >62160 177740 177760 > >For other versions you're looking for this sequence: > >Old New >000315 >006215 >006215 >042725 >177740 177760 >010015 > Jerome Fine replies: This post appeared on alt.sys.pdp11 and vmsnet.pdp-11 on Monday, March 3rd, 2008. While it fixes the bug for the month, the year is still incorrect. By the way, I can make available a full Y2K fix for V05.05 of MACRO which includes a 4 digit year - as opposed to DEC's version which only supports a 2 digit year. Just over a dozen words need to be modified, so an SLP file is probably the way to submit it. Naturally, the patch includes the above modification along with checking the rest of the year in the date word. Is there sufficient interest in having the patch? I have not found any interest in fixing bugs in RT-11, let alone in enhancements. Let me know. I can also produce Y2K bug fixes for DIR, PIP, IND, LINK, LIBR, etc. I use a free read only server to monitor a few text only news groups. Does anyone know of a free server that I can use to post a few times a year to news groups? Can anyone forward a post for me instead? I would request that you "modify" my e-mail address to prevent spam. Sincerely yours, Jerome Fine

18 years, 1 month

Large Pile, S-100 Computer Goodies Available

by kyrrin＠bluefeathertech.com

EQUIPMENT LOCATION: Kent, Washington, southeast of Seattle. NO SHIPPING. LOCAL PICKUP ONLY. Fellow techies, Since I'm no longer in the computer collecting arena, I think this would be of more use to others who are. I have available a huge pile (about 5 foot high by 3 or so wide) of S-100 computer stuff. There's one complete computer (a big NNC chassis with 8-inch floppies), plus a huge load of boards, documentation, extenders, an external drive cabinet, etc. This is taking up valuable space in my garage. I would much prefer that it take up space in someone else's, preferably someone who can appreciate it. With that in mind, first person to offer me $100 for the entire lot can have it. That cost is based solely on the time, gas, and effort I spent getting the stuff home. NO SHIPPING! LOCAL PICKUP ONLY! I don't have the facilities or tools to ship this lot, and I'm not sure I'd want to trust any of it to FedEx Ground or whoever in any case. -=-=-=-=-=-=-=-=-=-=-=- Bruce Lane, Owner & Head Hardware Heavy, Blue Feather Technologies -- http://www.bluefeathertech.com kyrrin (at) bluefeathertech do/t c=o=m "Quid Malmborg in Plano..."

18 years, 1 month

Obsolete chips

by cclist＠sydex.com

> Date: Thu, 06 Mar 2008 07:54:50 -0800 > 9034 - S/B 9094 = Dual J-K Argh. You have no idea how many databooks and catalogs I went through to find that 9034--and then was perplexed as to why anyone would carry a mask-programmed ROM as a generic part. Sigh. At any rate, there were a lot of manufacturers making DTL that we don't think of today. In particular, Philco: 9093 = 853 9094 = 856 9097 = 855 9099 = 852 9930 = 830 9931 = 831, etc. 800-series is the lower-cost "commercial" grade of 900-series logic with a narrower temp range, also available in plastic DIP. The confusing thing about DTL part numbers is how they're "shoehorned" within the RTL part number scheme. So, a 928 is RTL, but a 930 is DTL; A similar situation exists with the 9000 numbers. 9931 is DTL, 9989 is RTL. A point of curiosity that I have is what was the highest level of integration achieved before DTL was relegated to the "obsolescent" bin? I have a couple of Fairchild addressable 8-bit memories; was there anything more elaborate? A full adder, perhaps? Cheers, Chuck

18 years, 1 month

GAL16V8 as a modern substitute for a 7447?

by ethan.dicks＠usap.gov

Hi, all, Has anyone here worked with or ever plotted silently to create a moderish 7-segment decoder/driver from a GAL16V8? I'm working on a project made >from classic parts, and am trying to reduce part count rather aggresively, since I'm going to hand-wire it. One thought was to attempt to combine a 7490 _and_ a 7447 in a single GAL16V8. I have blown hundreds of PALs, but have much less experience in designing with them, so I'm not even sure that it's possible to mash together that much logic internally in a 16V8. I know all the outputs are optionally registered, so presuming one has 4 assignable flip-flops, one could theoretically make a counter on the output pins, but what's less clear to me is if you could then take those terms and internally decode them to a 7-segment display. After the large amounts of replies about this 8-way digital switch, I don't necessarily want to clog the list with discissions of what is and isn't possible for a GAL16V8, so if you can remember, please make any suggestions and comments to me directly, not the list. Thanks for any nudges towards a solution. -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 8-Dec-2007 at 15:40 Z South Pole Station PSC 468 Box 400 Temp -25.4 F (-31.9 C) Windchill -52.5 F (-47.0 C) APO AP 96598 Wind 13.7 kts Grid 12 Barometer 678.8 mb (10674 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html

18 years, 1 month

Value of big iron

by roger.holmes＠microspot.co.uk

The Curator of the Computing Collection at the (UK) Science Museum is coming down to see it in May to see my second ICT1301 to give me a provisional decision on whether they want to take it. If they don't, I have found someone as mad as me, who would like to buy it, but he want me to give him a price. My question is, how much is it worth? I don't want to ask too much but I don't want to find something similar is sold a couple of months later for ten times as much. I have two bracketing values, that I bought it for 150 GBP in 1977, and that it was sold new for 247,000 GBP in 1962, both figures plus inflation of course. That is a somewhat wide range, and must be reduced by the fact it is not assembled and will probably need many months work to get it into working condition, but even as a static display it is quite impressive. Does anyone know of any experts who could come down and value such an unusual thing? Probably none have been sold since I bought mine so it would have to be based on other brands or models. Roger Holmes

18 years, 1 month

Logic testing

by technobug＠comcast.net

At Wed, 5 Mar 2008 14:00:29 -0800 (PST), Herbert C. Williams wrote: > But... > Logic levels are different when using PNP transistors. IBM in its > SMS series > cards used "S" levels (+S and -S) which were -12 and 0volts. Commonly > germanium transistors were PNP, and the Vcc rail was a negative > voltage (in the > case of SMS cards -12 volts). If you have a logic analyzer, you > can TRY to use > it by connecting the ground level reference to -12 volts and hope that > something doesn't blow because the analyzer's ground is now at -12 > volts and > logic levels go "up" from there. My old Biomation K100 will take a +/- 50 volt signal and set reference levels to -6.4 to +6.35 volts. This should be sufficient to handle most logic levels out there. However, the newer logic analyzers typically restrict the reference levels to +/- 5V at best. Re-referencing ground still requires one to be able to set the reference level, which in the case of the cited logic probably requires +6 V. [...] CRC

18 years, 1 month

Obsolete chips

by trag＠io.com

> Date: Sun, 2 Mar 2008 12:09:29 -0500 (EST) > From: Steven Hirsch <snhirsch at gmail.com> > On Sun, 2 Mar 2008, Doc Shipley wrote: > >> At the risk of sounding like a broken record, MC Howard in Austin, >> Texas >> has been my source for everything from 74-series chips to 64-pin >> wirewrap >> The prices on their website are insane, but I've never heard of them >> actually charging what's listed. > > Interesting. If I tripped over that website on my own, I wouldn't have > the impression that it was worth my while to deal with them. Literally > everything brings up a page stating "...Coming Soon". And if you're ever in Austin, it's worth a stop by to browse the store. It's not huge, but it's fairly large and there are many shelves of Stuff. They also have a nice assortment of old connectors. Take Loop 1 (AKA MoPac) to 183. Go south on 183 to Burnet Road. Take Burnet Road north two stop lights to Longhorn. Turn left on Longhorn, take it to the end (a few blocks) turn left again, and Howard is in the second set of industrial buildings on the left, next to the carpeting distributer. Jeff Walther

18 years, 1 month

Western Peripherals TC130

by abacos_98＠yahoo.com

I recently acquired a Western Peripherals TC130 controller set. Does anybody have any expeience with this controller and would I be better off getting a single board solution. I have a Cipher 1734 drive I would like to use. Thanks, Brian.

18 years, 1 month

6502 CPU schematics

by lee＠geekdot.com

> Do you have any more information on this? Is it an official > document or something done to make a processor similar to a > 6502? I'd like to find the guy who did it. If he had the > CAD file then we could make a gerber. I think it has been created from the information on this site .. http://impulzus.sch.bme.hu/6502/ Lee.

18 years, 1 month

Program The Baby competition

by pete＠dunnington.plus.com

My friends in CompSci at York have reminded me that the School of Computer Science at the University of Manchester is organising a number of activities "to celebrate the 60th birthday of computing"" -- that is, to celebrate the 60th birthday of the "Baby" computer. There's to be a computer animation festival and a public open day in June that may be of interest to UK list members, and there's a "program the Baby" competition. Details at http://www.cs.manchester.ac.uk/Digital60/ -- Pete Peter Turnbull Network Manager University of York

18 years, 1 month

HP-IB drive simulator

by rdbrown＠pacific.net.au

The CS-80 & SS-80 information is up at bitsavers and linked off the IEEE-488 wikipedia article. Olivier De Smet's HP85 simulator has a 9121 emulation in. I have hpfddcs.pdf - Appendix A of some HP floppy manual documenting the Amigo command set for 9121 & the 5.25 posted by Frank McConnell in 2003 http://www.classiccmp.org/pipermail/cctalk/2003-May/021826.html http://www.reanimators.org/tmp/hpfddcs.pdf This mob http://www.isa-j.co.jp/english/product/HP/HPIB_SCSI/ supplies (expensively) new SS-80 HP-IB drives (Jon has it linked from the 9122 entry on hpmuseum.net). I think I also found a company in England providing CS-80 to SCSI drives for 1000s & 3000s. http://www.reactivedata.com/2-LegacyDiskAndTapeEmulators/leghp1000.htm I think some of the BSDs may have support for CS-80 drives. Since I just got myself a 7980 magtape (HP-IB), source for a unix driver would be really nice. Hope this gets to the list & is useful.

18 years, 1 month

Obsolete chips

by dm561＠torfree.net

Don't know if this made it first time; if dupe, pls excuse. -----Original Message: Date: Thu, 06 Mar 2008 07:54:50 -0800 From: Bob Rosenbloom <bobalan at sbcglobal.net> Subject: Re: Obsolete chips dwight elvey wrote: > Hi > Here is a list of the DTL that Anchor has. Does anyone have > a pinouts and types for these?? > > > 930 > 932 > 934 > 936 > 937 > 946 > 948 > 951 > 958 > 962 > 1800 > 9093 > 9034 > 9099 > > Knowing what these are would help in knowing what other DTL > numbers are the same part. > Dwight > I have data sheets for the following: 930 = expandable dual 4-input NAND 932 = expandable dual 4-input buffer 934 = hex inverter 936 = hex inverter 937 = hex inverter 946 = quad inverter 948 = clocked flip-flop 951 = multivibrator 962 = quad 2-input NAND gate plus inverter Bob ---------Reply: Hmm, I have slightly different info: 946 = Quad 2-input NAND 962 = Triple 3-input NAND On the other hand I can't find a 934 listed in my books... In addition: 958 = Quad 2-input power gate 1800 = Dual 5-input NAND 9093 = Dual J-K 9034 - S/B 9094 = Dual J-K 9099 = Dual J-K Also listed at Anchor: 935 = Hex Inverter (extendable) 949 = Quad 2-input NAND Equivalent devices usually differ in the value of the pullup resistor (if any): e.g. Dual 4-input NANDs: 930 = 6K P/U 932 = 2K P/U, driver 944 = O/C, driver 961 = 2K P/U The 935 was a 936 w/o any input diodes. Extendable (expandable) indicated a connection that bypassed the input diodes so that it could be externally expanded with more diodes or an extender like the 933. I still have some of these (maybe even some RTL) and of course the Databooks. Fairchild's DTL had a '9' prefix; NS used 'DM' m

18 years, 1 month

Obsolete chips

by dm561＠torfree.net

-----Original Message: Date: Thu, 06 Mar 2008 07:54:50 -0800 From: Bob Rosenbloom <bobalan at sbcglobal.net> Subject: Re: Obsolete chips dwight elvey wrote: > Hi > Here is a list of the DTL that Anchor has. Does anyone have > a pinouts and types for these?? > > > 930 > 932 > 934 > 936 > 937 > 946 > 948 > 951 > 958 > 962 > 1800 > 9093 > 9034 > 9099 > > Knowing what these are would help in knowing what other DTL > numbers are the same part. > Dwight > I have data sheets for the following: 930 = expandable dual 4-input NAND 932 = expandable dual 4-input buffer 934 = hex inverter 936 = hex inverter 937 = hex inverter 946 = quad inverter 948 = clocked flip-flop 951 = multivibrator 962 = quad 2-input NAND gate plus inverter Bob ---------Reply: Hmm, I have slightly different info: 946 = Quad 2-input NAND 962 = Triple 3-input NAND On the other hand I can't find a 934 listed in my books... In addition: 958 = Quad 2-input power gate 1800 = Dual 5-input NAND 9093 = Dual J-K 9034 - S/B 9094 = Dual J-K 9099 = Dual J-K Also listed at Anchor: 935 = Hex Inverter (extendable) 949 = Quad 2-input NAND Equivalent devices usually differ in the value of the pullup resistor (if any): e.g. Dual 4-input NANDs: 930 = 6K P/U 932 = 2K P/U, driver 944 = O/C, driver 961 = 2K P/U The 935 was a 936 w/o any input diodes. Extendable (expandable) indicated a connection that bypassed the input diodes so that it could be externally expanded with more diodes or an extender like the 933. I still have some of these (maybe even some RTL) and of course the Databooks. Fairchild's DTL had a '9' prefix; NS used 'DM' m

18 years, 1 month

Obsolete chips

by cclist＠sydex.com

> Date: Thu, 06 Mar 2008 07:54:50 -0800 > From: Bob Rosenbloom > Subject: Re: Obsolete chips All of the following are from the Motorola Big Brown Book: > 930 = expandable dual 4-input NAND ... 958 - Dual 2-input NAND Power gate 1800 - Dual 5-input NAND gate The following were obtained from a "direct replacement" chart: 9093 - Dual J-K flip flop (same as 953) 9099 - Dual J-K flip flop (same as 952) I can find a mention in an old catalog of this one, but have no additional information: 9034 - 256 bit ROM Cheers, Chuck

18 years, 1 month

Wanted: DEC Core memory (broken, too)

by hachti＠hachti.de

Hi folks, I am looking for Omnibus core memory. If anyone can offer me a complete memory.... But I am also interested in a BROKEN DEC H619 core stack to repair. Best wishes, Philipp :-) -- http://www.hachti.de

18 years, 1 month

(non?)HP Basic

by Tim＠Rikers.org

I got around to typing in a couple of my high school basic programs from a few old printouts. http://rikers.org/hp2100/dnd/ Anyone care to comment on the flavor of basic it used? This was an early version, and the instruction: 2440 PRINT "LOAD .DRAGN" was later replaced with a CHAIN command. This was he latest printed source I had, so I typed some in to see what folks can glean from it. -- Tim Riker - http://Rikers.org/ - TimR at Debian.org Embedded Linux Technologist - http://eLinux.org/ BZFlag maintainer - http://BZFlag.org/ - for fun!

18 years, 1 month

1st stage loader for IMSAI - need ascii to binary conversion

by jefferwin＠gmail.com

I am in the process of rebuilding an IMSAI 8080 and am using my Mac Pro as a dumb terminal. I have it all to the point where I can type a character and see the ascii appear on the front panel. What I need to do is write a simple 1st stage loader that will take the HEX output from the ASM80 assembler, send it over the serial connection and put it in memory. This way I can write a more sophisticated loader and not have to key it in by hand. The question is, what is the algorithm, in assembly language, for converting an ascii character to its binary equivalent. By this, I mean converting an 'a' to 1010, not 041H which is the ascii value. I remember writing such a thing 30 years ago but simply cannot get my head around it now. The algorithm has to deal with taking an ascii string like AF67DBFF6FF9AF81C2130053DBFF5FAAC2210039D20600780747D3FFAF4 and converting each ascii character into the binary value it represents. The sting above would convert, one character at a time, to: 1010 1111 0110 0111 1101 well, you get the point...It has to work only for 0-9 and A-F which should make it easier. Anyone out there remember how to do this? Jeff Erwin

18 years, 1 month

Logic testing

by roger.holmes＠microspot.co.uk

> > From: ard at p850ug1.demon.co.uk (Tony Duell) > Subject: Logic testing > > I fail to see what silicon .vs. germanium has to d owith the > polarity of > the logic cignals. In general PNP transistors, and for that matter > PMOS > fets, imply -ve logic levels, and plenty of machines were built using > those components. Also ECL chips have -ve logic levels (around -2V) > wrt > ground. I bow to your greater knowledge. I was employed as a programmer and picked up hardware later. > > The HP Logicdart (a handheld 3-input logic analyser) can certainly > handle > the PMOS logic signals in older HP handheld calculaotrs and the -15V > logic levels in the discrete transistor circuitry of the HP9100. I > don't > see why it'd not work for you. And most _decent_ logic analysers (as > opposed to the TTL-only toys...) can handle ECL levels. > > In cany case, I cna't believe the signals in your machine are all that > fast. Is it not possible to make up level shifter stages to turn them > into TTL-level sgiansl for testing? Indeed, the clock is 1MHz, 750ns high and 250ns low, with lots of wobbling about as the signal overshoots. Thanks Tony, if I see a logic analyser going cheap (though that is unlikely) I will buy it.

18 years, 1 month

IBM 3088 - Dummy questions

by Arno_1983＠gmx.de

"Bob Brown" <bbrown at harpercollege.edu> wrote: > Sounds like 4341 (or maybe 4331)'s (waist high, couch wide). > They were air-cooled. Yep - I always used to report the form factor of our 4331 (boarded in Hans Franke's warehouse in Munich) as "chest freezer". It has a big axial fan in a horizontal separator panel above the power supplies and two pairs of radial blowers on top of the logic gate - drawing ambient air in through the front grille and forcing it _down_wards through the cardcages. So long, -- Arno Kletzander Student Assistant // Studentische Hilfskraft Informatik Sammlung Erlangen www.iser.uni-erlangen.de Der GMX SmartSurfer hilft bis zu 70% Ihrer Onlinekosten zu sparen! Ideal f?r Modem und ISDN: http://www.gmx.net/de/go/smartsurfer

18 years, 1 month

Complete pdp8/e system on eBay

by jmiles007＠iquest.net

Sorry if this is bad form - I ordinarily would not post a mention of one of my own auctions but this is probably somewhat special. I have decided to sell my complete 8/e system, peripherals, software, documentations, and spares. Ebay auction number 270217347007 Jon Miles

18 years, 1 month

Albuquerque Craigslist posting: "Older RISC hardware free to collector"

by chowell2＠pacbell.net

(note I'm not a cctalk subscriber, though I read through the archives fairly often.) I was informed of the following posting to the Albuquerque Craigslist and thought people here might be interested: http://albuquerque.craigslist.org/sys/596509820.html ----- Older RISC hardware free to collector Reply to: sale-596509820 at craigslist.org Date: 2008-03-05, 12:24PM MST We have several '90s vintage RISC computers; Decstation, VAXStation, HP9000, Sun4, and RS6000. I think that I have media kits, documentation, and licenses for all of them but most of it's in boxes and I will need to check. The disks have been wiped to ensure no corporate data goes with them. These are obviously not speed demons, but they served us well for many years. The boss wants me to send them off for scrap, but that seems like a waste if there are collectors or enthusiasts who would like them. Free if you pick them up. I will not ship. These systems all booted and ran when they were turned off, but the disks have been wiped and I don't have time to test them. They are as is, where is, but they are free. * Location: ABQ * it's NOT ok to contact this poster with services or other commercial interests PostingID: 596509820

18 years, 1 month

Complete pdp8/e system on eBay

by g-wright＠att.net

Well belly up to the bar and show this piece that is finished and displayed better that this item Is......................... - Jerry -------------- Original message from Al Kossow <aek at bitsavers.org>: -------------- > > I bet you have a nicer set there than what the Computer History > Museum > > has for a PDP-8! > > Hardly > > What is in visible storage is a very small fraction of the Museum's > DEC holdings > which includes an RF08. > > >

18 years, 1 month

Complete pdp8/e system on eBay

by aek＠bitsavers.org

> I bet you have a nicer set there than what the Computer History Museum > has for a PDP-8! Hardly What is in visible storage is a very small fraction of the Museum's DEC holdings which includes an RF08.

18 years, 1 month

someone's got an expensive wang (terminal)

by legalize＠xmission.com

ebay # 160211814874 I have no idea why this went up to $300. Maybe they didn't realize it was only a terminal and not a computer? I could be wrong of course, but it looks virtually identical to the terminal I bought not too long ago. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html> Legalize Adulthood! <http://blogs.xmission.com/legalize/>

18 years, 1 month

Nostalgia trip

by James＠jdfogg.com

> For those interested in a snapshot of the way BBS's were 21 years ago, > point > your telnet client at landover.no-ip.com This bangs me out of putty with haste. Does the server accept telnet on the standard port?

18 years, 1 month

Jump to page:

2026

2025

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb