test-drb

test-drb@ccmp.vtda.org

101090 discussions

by aek＠bitsavers.org

> I know the Acorn > Archimedes runs RiscOS, but what else? I'm not sure > that the Acorn was ever even sold in the US. As far as I know it was not. My first exposure to the Acorn machines were those brought over in '87 for Apple's first attempt at a RISC Apple II (Moebius). I never saw a RISCOS machine sold here. I've found a few of them on eBay for CHM. Shipping from the UK is painful. I've also had an unusually high percentage of them never arrive.

18 years, 10 months

newbie building a scratch-built computer

by ajp166＠bellatlantic.net

> >Subject: Re: newbie building a scratch-built computer > From: "Chuck Guzis" <cclist at sydex.com> > Date: Fri, 03 Aug 2007 20:41:57 -0700 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >On 4 Aug 2007 at 4:18, Ensor wrote: > >> <GRIN> What, like a logic probe...? > >I figured if the OP was using an LED as a logic probe, then he might >not want to throw his filthy lucre after a commercial probe. It's >easy enough to toss one together out of hellbox detritus. > >> I don't actually have a logic analyser myself (annoyingly), and tend to >> reach for my logic probe long before I resort to digging out my 'scope. I >> find mine indispensible. > >Same here; rather than set up a scope just to see if a line is >wiggling, a logic probe is much easier. on my bench I have a several multimeters [digital and analog], scope, a pc based logic analyser and a logic proble. the onder they are used generally puts the logic analyser last right after the scope. >> If the OP is in the UK, then Maplins do a nice one for ?15 (which is less >> than I paid for mine back in 1980). > >Radio Shack used to offer one for a reasonable price, but no >longer... I have one of those and it works ok, I also have one that responds to really fast pulses. Allison

18 years, 10 months

UK VCF?

by sellam＠vintagetech.com

RE: trademarks I stand corrected: Hans Franke acquired EU trademarks on "Vintage Computer Festival" some time ago. I imagine these would extend into the UK in some fashion, but then I'm not an international lawyer (or otherwise). -- Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org [ Old computing resources for business || Buy/Sell/Trade Vintage Computers ] [ and academia at www.VintageTech.com || at http://marketplace.vintage.org ]

18 years, 10 months

Help needed...VAX 7000 mop booting problems

by pat＠computer-refuge.org

So, I've been trying for a few days to get my VAX 7000/640 (currently with only one processor, so a 610 I guess) to MOP boot into a VMS cluster. I'm running OpenVMS hosted off SIMH, and have tried both 7.2 and 7.3, and have successfully booted my VAX 4000/100 off the setup. I've also successfully booted the firmware update utility (LFU) and the file "ISL_LVAX_073.SYS" that comes on the install CD, through MOP. However, when I try to do a mop boot, the system just halts and says boot failure: --------------------------------------------------------------------- >>> b -fl 0,0,0 exa0 Initializing... F E D C B A 9 8 7 6 5 4 3 2 1 0 NODE # A M . . . . . . P TYP o + . . . . . . + ST1 . . . . . . . . B BPD o + . . . . . . + ST2 . . . . . . . . B BPD + + . . . . . . + ST3 . . . . . . . . B BPD + . . . . . + . . + . . . + C0 XMI + . . . . . . . . . . . . . . . . C1 . . . . . . . . . . . . . . . . C2 . . . . . . . . . . . . . . . . C3 . A0 . . . . . . . ILV . 512 . . . . . . . 512MB Firmware Rev = V4.3-4842 SROM Rev = V3.1-0 SYS SN = AB25002CX0 Booting... Connecting to boot device exa0 Created device: exa0.0.0.1.0 Attempting MOP boot. Requesting MOP Assistance Volunteer. MOP Assistance Volunteer found. Loading... ... Load complete! Image size: 133241 Host name: SIMV73 Host address: aa-00-04-00-06-04 bootstrap code read in base = 154000, start = 0 boot device name = exa0.0.0.1.0 boot flags 0,0,0 boot device type = 69 controller ID = a unit number = 0 node ID = 0 channel = 0 slot = 1 hose = 0 jumping to bootstrap at 154000 CPU:0 Console entry reason: HALT instruction in kernel mode Entry PC: 006B6368 Entry PSL:041F0600 >>> boot failure --------------------------------------------------------------------- I've tried it omitting the -flags part, and with -fl 1, but they all give the same error. Anyone have any useful hints? Or, another VAX 7000 to try repeating my (failing) experiment on? Thanks, Pat -- Purdue University ITAP/RCAC --- http://www.rcac.purdue.edu/ The Computer Refuge --- http://computer-refuge.org

18 years, 10 months

UK Classic Computer event (Was VCF UK)

by classiccmp＠memory-alpha.org.uk

Hi, > Can we have a quick poll to see who lives where? I'm located in Birmingham. TTFN - Pete.

18 years, 10 months

UK Classic Computer event (Was VCF UK)

by RodSmallwood＠mail.ediconsulting.co.uk

UK Pioneers? If it were not for the fact that they are in permanent off line storage. Alan Turing and Tommy Flowers. Or some of the LEO people - (5000 valves and 33kW of heat to get rid of) -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Roger Holmes Sent: 03 August 2007 10:42 To: cctalk at classiccmp.org Subject: UK Classic Computer event (Was VCF UK) > > If Bletchley Park might be able to do a VCF in two or three years >> time, maybe we could do something much simpler in the mean time, >> without using the VCF name. Just a get together of anyone in the UK >> with an interest in old computers and hopefully a few who would want >> to exhibit theirs. Who would be interested and about how much space, >> if any would they want? > > > My thoughts were developing along the same lines, the key question > surely is numbers. 7 replies so far from the UK. > How many do we think would attend, and could some core events be lined > up to to ensure a worthwhile experience? I'm thinking here of the > datacentre visits that (I think) were run from VCF Europe last year I see. Probably the biggest concentration of these in the UK is still central London, though I'm out of touch with that side of things. > and the involvement of industry alumni that the US events have > enjoyed. Many of the real pioneers (who are still alive) are in the Computer Conservation Society. Maybe we could involve them, I am a member but I don't attend meetings (except one as a speaker). > It's not like we don't have a few home-grown pioneers - Clive Sinclair > and various Acorn people spring to mind. Ah, you're talking more modern pioneers, ones of the microprocessor era. Yes indeed. Alan Sugar's probably free now :-) Just kidding. Do we have any contacts or ideas on how to contact them? Isn't it Sir Clive now by the way, we don't want to put anyone's nose out of joint from the first contact. Roger.

18 years, 10 months

UK Classic Computer event (Was VCF UK)

by RodSmallwood＠mail.ediconsulting.co.uk

I'm located about 50 miles west of London (near the (in)famous Greenham Common.) Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Gordon JC Pearce Sent: 03 August 2007 11:32 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: UK Classic Computer event (Was VCF UK) On Fri, 2007-08-03 at 10:42 +0100, Roger Holmes wrote: > I see. Probably the biggest concentration of these in the UK is still > central London, though I'm out of touch with that side of things. I got the impression that the bulk of the UK classic computing community was around the Midlands and north, with a few exceptions. Can we have a quick poll to see who lives where? I'm about half-way up Scotland on the left-hand side. Gordon

18 years, 10 months

ST-412 Jumpers

by silvercreekvalley＠yahoo.com

I'm just trying to figure out the jumper settings on a ST-412 drive. I've read the manual and it sort of helps, but its somewhat obtuse in style. I have two drives which are taken from working PDP 11/23's - they both have the same setting on the jumper block. The jumper block is a 16 pin DIL socket, with a 14 pin DIL plug inserted. The plug has 7 metal bars, 3 of which are open circuit, the rest are closed. Working from the connector end of the PCB, the first bar - open second bar - open third bar - closed fourth bar - open fifth bar - closed sixth bar - closed seventh bar - closed Looking in the manual the first bar would persumably be written as 8-9, the second as 7-10 etc? Anyway, I'm trying to use this in a PERQ just to test the EIO is working, and I can boot of floppy. So I need to set this as drive 1. What bars would I need to open and close? Thanks Ian. ____________________________________________________________________________________ Yahoo! oneSearch: Finally, mobile search that gives answers, not web links. http://mobile.yahoo.com/mobileweb/onesearch?refer=1ONXIC

18 years, 10 months

newbie building a scratch-built computer (River)

by Billy.Pettit＠wdc.com

Chuck Guzis wrote: At one time or another, cross-assemblers in FORTRAN were coded up for most of the early 8-bit chips. I believe that Intel even offered one as a standard product at one time. GI certainly did--I have it mentioned in their product brochure. The real problem would be locating one of these. In all likelihood, one last saw existence as a stretch of 9-track 1/2" tape. Cheers, Chuck --------------------- That was a standard practice back in the 1960's. I still have paper listings of a FORTRAN program to cross assemble CDC 160-A code on a 3300. And I think (been a few years) that I have the same cross assemblers for the 1604 and 924 machines. Later, there were 6600 FORTRAN cross assemblers for all the 3000 machines. My copies of these are on a 7 track tape which now resembles a solid disk of celluloid, sadly. The card decks went into the dumpster on the last move. But you are correct about 8 bit support using FORTRAN. I know I had paper listings for the 6502, 8080 and Z80 processors. And I think I still have the BASIC cross assembler for the 6502. Thinking about it, I also gave Al a paper tape for a 6502 assembler that I used on an Apple II with a teletype. I'll have to ask Al if he has had any luck archiving it. There were definitely FORTRAN cross assemblers for the Motorola chips (6800 &6809) floating around for years. But I don't think I ever saved any. Must look and see. Billy

18 years, 10 months

Linus 1000 Write-Top computer

by tosteve＠yahoo.com

I just received my Linus 1000 computer - it's nice, interesting to use. But it has no stylus (writing pen), just the wire - still useful, just have to be careful to not scratch the screen. Does anyone have any interesting information, manuals, or a stylus? Thanks! Steve. --------------------------------- Sick sense of humor? Visit Yahoo! TV's Comedy with an Edge to see what's on, when.

18 years, 10 months

Acquired - IBM portable / IBM Model 5155

by mark.seeberger＠argis.com

Do you still have this machine available? Mark Seeberger ====================================================== Hello, all: A friend of my sister-in-law gave me the original IBM portable (well, lugable) Model 5155 and RGB monitor. It's the dual drive model. There's a 37-pin DB connector on the back. External floppy?? I have to say, this equipment is in the best condition of any classic item I have ever acquired. Not a scratch, dent or cabinet fade. No dust either...anywhere. I know that the owner was anal retentive, but oh boy. I haven't tried yet, but it was just taken out of service after many years of use. Rich [ Rich Cini [ ClubWin!/CW1 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ <http://highgate.comm.sfu.ca/~rcini/classiccmp/> <================ reply separator =================>

18 years, 10 months

UK VCF?

by marvin＠rain.org

> > Sellam, if you're so enthusiastic as to set up a "rival" VCF to spite > > someone setting up a VCF-a-like, why not just set up a VCF in the UK? > Now, we could all type about this, discuss the finer points of > international trademark law and call each other names, or we could > push ahead, think of a rough location and discuss some of the > logistics and what would be needed to undertake VCF-UK. > > Simon Great comment!!! And as to what's in a name, try "recognition" since VCF has been going on for some 10 years. I would expect both Sellam and Hans to be *very* interested in getting a VCF UK going. Instead of putting up straw men to argue about, try working together ... it is a lot more effective!

18 years, 10 months

More on CUBIX - Was: newbie building a scratch-built computer

by ajp166＠bellatlantic.net

> >Subject: More on CUBIX - Was: newbie building a scratch-built computer > From: "Dave Dunfield" <dave06a at dunfield.com> > Date: Fri, 03 Aug 2007 07:29:17 -0500 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >>> If the whole purpose of this exercise is to have an old 8-bit system so you >>> can program in hex and/or assembler, then you can download an emulator and >>> play around with it from there. If you mainly want to run things off the >>> various serial and parallel ports then something like the Micro-KIM would be >>> useful. > >There's an experience gained by building it yourself that simply can't be obtained >by playing with an emulator. Building a real/physical computer is a worthwhile >excercise and beneficial learning experience. Besides, friends and family are much >less impressed by a wave of the hand at a PC running an emulator with the statement >"I downloaded that!" then they are by a rats nest of wires, circuit boards, cables >and such and "I built it myself!" > There is magic in building it yourself however it's constructed be it emulator or hardware. The magic is that you have to understand it to build it. Simply assembling "it" does not provide it beyond the mechanical accomplishment though if you study the result there will be knowledge gained. <<<snippage>>> >Another plug for my CUBIX system: > >The system comes with the following resident (runs on CUBIX itself) development >tools: > > 6809 Assembler > ASP - A simple high-level language/preprocessor for the assembler. > Debugger (breakpoints, single-step, disassembler, all the usual commands etc.) > Basic > Forth > Micro-APL > C compiler > 8080 simulator > Text editors / utilities / etc. > - Source is posted for all of the above except for the C compiler. > >I can also provide PC based cross development tools for the 6809 including: > > Hardware Debug Monitor (RAMless - needs only ROM to run) > Full-up ROMable 6809 monitor (Quite powerful) > 6809 Assembler > 6809 Disassembler (Does symbols, memory block types, comments etc.) > 6809 C compiler > 6809/CUBIX simulator/emulator - Lets you run 6809 code on your PC with ICE > type debugging capabilities - Also boots CUBIX, provides access to all > the resident tools etc. He may appear biased but those are powerful tools and unlike back when I built my Altair or the 8008 before that they are available! >I'm obviously biased, but I think it's a worthwhile system to build. Depending >on your skill/experience/time available, it should take anywhere from a day or >two to a few weeks to build it. What you get from the excercise is a unique >system that can actually do useful things, and the experience and satisfaction >of having created it with your own two hands. Having built it yourself, along >with the fact that I have released the source code means that you have the >opportunity to fully understand EVERYTHING about this system - down to the >tiniest wire, and the last byte of code - this is something that rarely happens >with modern computers. This system is simple enough that you shouldn't have >trouble following the design, yet powerful enough to be considered a "real" >computer. MY $0.02, great teaching tool, good for understanding hardware, excellent for a look at a straightforward OS example that is very usable. For an old hand PDP8/11, NS*DOS and CP/M style OSs CUBIX OS was a real eye opener to different ways files can be orgainized. <<<<snippage>>>> >I should also point out that unlike most home-grown designs, the CUBIX system >is very well documented. Two of the three 360k diskettes that normally accompany >the system are filled with documentation. Over a dozen documents containing >more than 300 pages. Therein lies the greatest value. Even if you didn't build it there is a wealth of information that applies to any CPU/system. >What else can I say - all of the CUBIX material is available free on my site. >If people are interested, I could organize it into a separate "building a >CUBIX system" page with more information, additional PC tools and other related >material. Let me know if there is any interest. Having built one and meaning to spend more time with it it's a good project and in some respects less painful than doing a Z80 CP/M machine from the ground up. The key thing is that when operational like CP/M systems there is enough software to be useful. This is unlike the microKIM, CosmacELF style minimal systems where hand entered programs of a a few hundred bytes are it. The other feature is there is a CUBIX SIM and while building you can become familiar, read docs, look inside the code and develop software or other projects. Allison

18 years, 10 months

Fwd: [sdiy] Wanted: Multibus (late 70s microprocessor bus) extender card

by aek＠bitsavers.org

> Does anyone happen to have spare, or can anyone point me in the direction of > an inexpensive source for, an extender card for Multibus Halted Electronics has dozens of them in their 1/2 off bin

18 years, 10 months

UK VCF?

by RodSmallwood＠mail.ediconsulting.co.uk

Hi As much as I would like to see something along these lines. It would be best to sort out the funding first. Perhaps a small group of interested parties could meet to see if such an event is feasible in the UK. Rod Smallwood -----Original Message----- From: cctech-bounces at classiccmp.org [mailto:cctech-bounces at classiccmp.org] On Behalf Of Andrew Burton Sent: 02 August 2007 23:16 To: General Discussion: On-Topic and Off-Topic Posts Subject: Re: UK VCF? Roger Holmes <roger.holmes at microspot.co.uk> wrote:> First a simple question, how many readers of > this list are in the UK? I am one of (hopefully) many :) > If Bletchley Park might be able to do a VCF in > two or three years > time, maybe we could do something much simpler in the mean time, > without using the VCF name. Just a get together of anyone in the UK > with an interest in old computers and hopefully > a few who would want > to exhibit theirs. Who would be interested and > about how much space, > if any would they want? Not much. Just enough to have a table for my laptop & opened up Amiga. I could bring a few issues of 80 Microcomputing aswell, which would be the ones I have duplicates of. The duplicates aren't in particularly good condition so it doesn't matter too much if they were to get accidentally damaged :) All the other issues of 80 Microcomputing I have are pretty much in mint condition and I wouldn't risk bringing to the event (is that bad? Would anyone else feel the same way?). > I guess we would need to double that up to allow for aisles etc. Then > we'll know the size of venues to look for. By the way, I was really > thrown by the mention of the planet Venus, it took me a while to work > out it was a typo for venues :-) > > Then there's the question of vehicle parking. > How many and are we > talking only cars and small vans or big vans and articulated lorries? I'd just bring my car. > Roger, > who is planning a 1300 sq ft extension to his computer room, and who > lives on a farm in Kent. Probably too small and > not central enough, > but who knows. Regards, Andrew B aliensrcooluk at yahoo.co.uk

18 years, 10 months

As is test equipment

by phat＠mountaincable.net

Hello there: I realize this is a bit of stretch since 2002 but do you still have the General Radio 1217/1201C combo still for sale? Regards, Paul

18 years, 10 months

newbie building a scratch-built computer

by classiccmp＠memory-alpha.org.uk

Hi, > What is wrong with C?! :( Don't get me started.... ;-) > Yes it is not assembly, but it is also much closer to the >hardware then most of the other structured programming languages >out there! I've always regarded "C" as more of a "high level macro assembler", I personally don't regard it as a high level language as such - sort of a halfway house. Now, if you understand how C "works" (read K&R a few times as a start) and the intimate details of your target hardware then you can do a passable job. The problem is, most programmers nowadays simply don't have that level of knowledge, which inevitably leads to large, slow, buggy firmware which is nigh on impossible to fully debug. And then there's the issue of readibility. I don't care what anyone says, I find assembly language listings VASTLY easier to understand than someone elses' "C" code no matter how well commented/documented (even when I've never encountered that particular processor before). I'll give you a personal example. I was once tasked with converting a real time OS from Z8 assembly language (yes, Z8) to V50 (x86) assembly language; we're talking a lot of code here, the assembled code filled almost an entire 32K EPROM. Took me about three and a half weeks, at the end of which I had a well structured, fully documented and FULLY DEBUGGED (I took a LOT of pride in never releasing code which was less than 100%) product which was cleared for production. Unknown to me at the time, initially at least, my boss also tasked our "C" programmer to do the same job. He did the conversion in about two weeks....and then spent the next TWO MONTHS trying (and failing) to track down the bugs in his code, about a third of which were caused by compiler bugs rather than something he'd done wrong. I was eventually brought in to help him, at which point I learnt rather a lot about how bloated and inefficient the output from "C" compilers can be. Needless to say, it was impossible for us to fully debug his code (or fit it into a 32K EPROM for that matter) and so it was dropped in favour of mine. "C" certainly has it's uses (I'm sure), but in my opinion, embedded systems/device drivers isn't one of them.... TTFN - Pete.

18 years, 10 months

C history / was Re: newbie building a scratch-built computer

by aek＠bitsavers.org

> I recall a conversation with a fellow at Xerox R&D on Coyote Hill > Road (not PARC) around 1983 or so. He remarked that much of the > Xerox document management code was in 'B' and not C. Unlikely. 'B' was a BCPL derivative which predated 'C' at Bell Labs. BCPL was used at PARC as the basic high level language for the Alto. During this same time period, a strongly typed language called Mesa was developed, which was used on the Alto, and later on the machines which evolved into the Xerox Star. Variations of Mesa were the primary Xerox development languages up through Globalview, which caused Xerox huge problems with hiring programmers, since no one outside of this world had any experience with the language. They eventually developed a Mesa to C translator called Memosa.

18 years, 10 months

PERQ T2

by ajp166＠bellatlantic.net

> >Subject: Re: PERQ T2 > From: ard at p850ug1.demon.co.uk (Tony Duell) > Date: Thu, 02 Aug 2007 19:54:44 +0100 (BST) > To: cctalk at classiccmp.org > >> >> Hi Tony, >> >> Thanks for the reply. >> >> The drive is a Micropolis 1303, and I think it has >> failed. The >> drive does spin down after a minute or so. > >You know, it's really hard debuggin a machine when you're not told all >the symptoms :-) > >More seriously, this does sound like the standard Micropolis 1300-series >problem, when that rubber bumper goes sticky and prevents head movelemt. >The bad news is that all Micropolis 1300s (and their ESDI equivalent?) >suffer from it, or at least if they don't they will soon. > >Finding a replacement 1300-seires is probably not the wisest thing to do, >therefore. > >I've never tried it, but I have heard that people have had some success >in openign up the HDA *yes, outside a clean room), removing the bumper, >shutting the whole thing up and using the drive as normal. How long it'll >keep working is anohter matter. I've done it three times and two are still running over 8 years and many thousands of hours later. I'ts been done by others. Allison >> >> I noticed the PERQ manuals do state that the hard disk >> must >> be able to perform a "locate disk heads" operation, >> even >> for a floppy boot - which I assume means find track 0. > >I beleive the hard disk must og 'Ready' Quite what that means I will have >to check -- the boot ROMs check for a particular state in one bit of a >particluar port. I candig out the EIO and DIB schematics to find out just >waht that means if you like. > >> Hence >> I'm unable to boot from floppy. >> >> I will check the signal levels just to be sure. >> >> Wondering where to go from here. I'm guessing I could >> buy a >> replacement 1303 drive - but they are not cheap (hence >> my >> other posting) just to try and see. > >Any reason not tu use some other ST412-interfaced drive? The PERQ _can_ >use it. > >-tony

18 years, 10 months

perkin-elmer/concurent manuals

by Philip.Hastings＠pseg.com

I might be interested in these if you still have them ----------------------------------------- The information contained in this e-mail, including any attachment(s), is intended solely for use by the named addressee(s). If you are not the intended recipient, or a person designated as responsible for delivering such messages to the intended recipient, you are not authorized to disclose, copy, distribute or retain this message, in whole or in part, without written authorization from PSEG. This e-mail may contain proprietary, confidential or privileged information. If you have received this message in error, please notify the sender immediately. This notice is included in all e-mail messages leaving PSEG. Thank you for your cooperation.

18 years, 10 months

Micropolis 1303

by silvercreekvalley＠yahoo.com

Hi Tony, I did try some other drives, namely some MFM drives I had to hand from a PDP 11. These were ST-412 drives. I simply connected the existing PERQ controller to the new drive, hoping the hard disk would show ready, but no joy. The drive didnt even show a flicker on the LED. The drives were all known working, and boot fine on a 11/23. I didnt change any jumpers as the drives were the only drive in the PDP 11's. Could this mean a fault EIO card? I've examined the board carefully under a maginfier for track breaks, dry joints, and damage. The edge connectors were cleaned and all IC's have been carefully re-seated. Ian. ____________________________________________________________________________________ Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&…

18 years, 10 months

PERQ T2

by silvercreekvalley＠yahoo.com

Hi Tony, Thanks for the reply. The drive is a Micropolis 1303, and I think it has failed. The drive does spin down after a minute or so. I noticed the PERQ manuals do state that the hard disk must be able to perform a "locate disk heads" operation, even for a floppy boot - which I assume means find track 0. Hence I'm unable to boot from floppy. I will check the signal levels just to be sure. Wondering where to go from here. I'm guessing I could buy a replacement 1303 drive - but they are not cheap (hence my other posting) just to try and see. Ian. ____________________________________________________________________________________ Fussy? Opinionated? Impossible to please? Perfect. Join Yahoo!'s user panel and lay it on us. http://surveylink.yahoo.com/gmrs/yahoo_panel_invite.asp?a=7

18 years, 10 months

Thoth

by aek＠bitsavers.org

Brent Hilpert wrote: > Around 1980 I was programming in Z (dev'd at U of Waterloo IIRC, Thoth/Verex > OS), another descendant of B/BCPL and so a sibling of C Are there still copies of Z or the operating systems around that you know of? I asked Dave Cheriton about this a few years ago, and he didn't have a copy.

18 years, 10 months

HP 165xx internal documentation?

by aek＠bitsavers.org

On the chance that someone might know someone from HP Colorado Springs.. Is there any documenation around on the operating systems or internal workings of the 16500A or B logic analyzers? The 500B is a pretty sophisticated device, but of course there is no useful docs in the service manual on how the hardware or software actually works.

18 years, 10 months

Fwd: [sdiy] Wanted: Multibus (late 70s microprocessor bus) extender card

by rtellason＠verizon.net

Can anybody here help this guy out? ---------- Forwarded Message ---------- Subject: [sdiy] Wanted: Multibus (late 70s microprocessor bus) extender card Date: Tuesday 31 July 2007 17:30 From: "Steve Lenham" <lenham at clara.co.uk> To: "SDIY list" <synth-diy at dropmix.xs4all.nl> Hi, Does anyone happen to have spare, or can anyone point me in the direction of an inexpensive source for, an extender card for Multibus (the late 70s microprocessor bus standard)? I know that Digikey and Mouser list them new, but they are around $120 each. I'm working on a Lexicon 224 reverb unit (a fascinating device), which uses a Multibus backplane and eight plug-in cards. I need to be able to work on these cards with them still attached to the bus - hence the need for an extender. Any pointers would be much appreciated. I'm in the UK, but am happy to import. Cheers, Steve L. _______________________________________________ Synth-diy mailing list Synth-diy at dropmix.xs4all.nl http://dropmix.xs4all.nl/mailman/listinfo/synth-diy ------------------------------------------------------- -- Member of the toughest, meanest, deadliest, most unrelenting -- and ablest -- form of life in this section of space, ?a critter that can be killed but can't be tamed. ?--Robert A. Heinlein, "The Puppet Masters" - Information is more dangerous than cannon to a society ruled by lies. --James M Dakin

18 years, 10 months

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test-drb