test-drb

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101090 discussions

by maxeskin＠hotmail.com

A few months ago, PC World did a similar thing, only they made real hardware problems. Cutting the IDE cable on some machines, and rearranging RAM in others (so the SIMMS were no longer paired). Noone solved this. Better yet, the next issue, they published a letter saying that these were clearly artificial problems, and I quote, "IDE cables just don't fail". The guy said that a tech would never think to look at it. BTW, do you train service techs? >> >> Allison >> >> > >Actually I agree with you. I put the following problem in front of some >techs at TRW who did dos PC's as part of some in-house training. > >I wrote a program that did a cold boot. I attached it to the >ANSI.SYS driver. I gave this PC to them to fix. > >I watched them swap memory, power supply, motherboard, hard disk controller >and such for an hour. > >After they got tired... I closed the floppy door an a write protected >MS-DOS 3.3 floppy and it booted. > >They never once looked at a software problem. I guess doing mini systems >taught me something. > >Bill > >+---------------------------------------------------------------------------+ >| Bill/Carolyn Pechter | 17 Meredith Drive | Tinton Falls, New Jersey 07724 | >| 908-389-3592 | Save computing history, give an old geek old hardware. | >| pechter(a)shell.monmouth.com | >+---------------------------------------------------------------------------+ > ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com

28 years, 2 months

Early Mac Clones

by tomowad＠earthlink.net

>I have one--in pieces. I don't know if it works but I got it all >disassembled with cables hanging out of it. A neat unit. Hopefully I'll >find a complete one some day, or get this one working. There were not Mac >ROMs in it by the way. I paid $5. Do you mean they were cloned or just weren't any there? >What specifically did you want to know? Anything not already mentioned. The Outbound I've read about, but the other clones are entirely new to me. Tom Owad

28 years, 2 months

Former Disk Costs (was: 32 bit Macs (was Atari hard ))

by allisonp＠world.std.com

<YEs, but you need to keep quite a bit of stuff in memory. I think perhap <32K of data memory. I'd like to see anybody fit all of TeX82 into the <other 32K that's common on a CP/M system. Overlays and other sectioning techniques. Also a good portion 32k data area can be farmed to disk files. 64k space can be tough but people ahve done bigger things in smaller machines. Allison

28 years, 2 months

Amazing

by red＠bears.org

Microsoft NT Server 4.0 ships with GORILLA.BAS Completely bizarre. Any guesses why? I know it's not really classic as I'm fairly sure GORILLA.BAS didn't ship with MS-DOS until version 4 or 5. Still. Weird. ok r.

28 years, 2 months

680x0's, Towers, & Serendipity

by allisonp＠world.std.com

<> The tower actually *boots* from the tape during install! Is that <> crazy or what? < <What's strange about that? My old Zilog S8000 (Z8001 processor) does the <same. And most minis can boot from their tape drvies. It's a standard way <boot real machines. Bigtime PDP-11s (rsts, RSX-11 and even RT on tape), vaxen all can. I've booted CPM from paper tape! Allison

28 years, 2 months

Wire Recorder

by lgroebe＠insidermarketing.com

>This is not about computers, but it's vintage tech so it's almost on topic... > >Just picked up a very cool miniature battery operated wire recorder and I >need to find out what sort of battery it originally used - or at least to >find out what voltage it takes so I can try it out. Also would like to find >out more about it - date, original cost, etc. > >It's a Minifon Special, made by Protona (Hamburg, Ger.). The battery >compartment measures 1.25 x 3.5 inches, with a flat, brass spring contact >at either end. > >It's a beautiful little machine, in mint condition, complete with fitted >pigskin case. Even the original spool of hair-thin wire is unbroken. >Outside dimensions are 4 x 6.5 x 1.25 inches and it's finished in a sort of >goldish-cream textured lacquer. There are two din sockets on the front, one >with three pins for the mike (included), and another, unmarked, with nine >pins. > >Anybody know anything about this little gem? Surely someone on the list >goes back far enough to have seen one of these... > >R. > Ahh yes, the Minifon. Yes, it's off-topic, but it is/was indeed a cool piece of technology. German from the early 1950s. Wire recording had all but died out, but this machine was smaller than any TAPE recorder, so there was a niche market. Yes, it was used by spies, law enforcement, and such. (There was a version of the microphone built to look and be worn like a wristwatch!) It used subminature tubes 1 1/2 inches long. If you find a 1953 Allied radio catalog you'll find it listed for sale there for $289.50. A transistorized version of this wire recorder was being built after 1960! There's some info on this and about a zillion tape recorders from the 1950s and 60s in a book called "Evolution of the Audio Recorder" by Phil Van Praag. A book I thought I'd never see written - I guess it took an old audio technician to write it. --Larry (Who, in an attempt to drag this back on topic, is trying to envision a wire-recording storage device for a computer. Lousy tracks per inch.)

28 years, 2 months

off topic.....

by poesie＠geocities.com

I found a compaq vocalyst keyboard today, has 4x5 box type plug... _________ o o o o o o o o o x x x x x x x x x x x --------- something like that, w/ the x's as pins. has built in speaker, mic and ext speaker jack, and PS/2 mouse port on keyboard... any idea what this thing is? or what it was for? i realize that it's not that old, but my interest is too piqued to let it ride.

28 years, 2 months

"Computer Hobbyist" + Homebrew computers

by lgroebe＠insidermarketing.com

>On Fri, 5 Jun 1998, Jon Healey wrote: > >> After a fair amount of effort on my part, I found and obtained a >> copy of the July 1974, Radio-Electronics mag that has the cover >> story "Build the Mark-8, your personal minicomputer". I was >> less than delighted to find that in this instance, R-E left out >> most of the construction details (including any skematics). >> They have an offer on the second page of the article where >> you should order the kit with circuit board patterns, and >> the rest of the details. The article includes some theory of >> ops, a parts list and a few photos. > > >Actually... about a year ago as part of my efforts to re-create a >'Mark-8', I contacted Gernback Publications and was able (with suitable >begging and pleading) to get them to loan me the last existing masters for >the article series AND the construction package. > >>snip > >If anyone would like a copy of this document set, drop me a note. I'd >suggest that to avoid generation loss in copying the docs yet again you >consider sending along a blank CD-R disc with a SASE for its return, and >I'll provide you with the scanned (TIFF) files. (no charge) It's WAY too >big for floppies! > >If you require printed copies, it would be just the cost of printing and >postage. > >(...and if you make a new set of PC boards, I want one too!) B^} > >-jim OK, I just got back in town. Were you deluged? What's your address? I'd be happy to send you a blank CD if you'll make me a set. --Larry Groebe --Dallas TX

28 years, 2 months

680x0's, Towers, & Serendipity was:Stupid lusers...

by JRichardson＠softwright.co.uk

>> Anyways, I also have a 400 series Tower (as mentioned in the exerpt >> below), and lots of spare boards (including the meter-long >> systemboard). nice to know there's still some Tower users about - there seemed to be quite a following a few years ago but interest in them seems to have dried up (although there's probably a few posts to comp.sys.ncr still - one day I'll get proper Usenet access here :) do you know if NCR (or AT&T, or whoever's responsible for these things these days!!) can still supply OS tapes? I got my '700 with all sorts of software on the disks - the guys it came from we in to developing programs for X-windows so there's quite a lot of cool stuff on there. Sadly no OS tapes and no manuals (I borrowed field service manuals from someone a while back so have all the useful info from there). mind you, last time I tried to power up the machine it was completely dead. I only had a few minutes so checked obvious fuses etc, but without any luck. Hopefully something simple - I don't fancy trying to trace a fault on one of those system boards :*) > cheers Jules

28 years, 2 months

Early Mac Clones

by allisonp＠world.std.com

<But there's a difference between a Z-80 running a text-mode interface, <and an 8088 running a GUI. Also, remember that Bill Gates didn't know Not much. Some z80 systems were faster, considering by time thge 4.77 mhz 8088 was making inroads around 84ish the z80s were cranking at 8mhz some faster. Also the 8088 was anout the same efficientcy as the z80 for byte data. There were a few z80 system with 128k or more of ram running at 6mhz around the time of the PC introduction. I have a Visual1050 (early 1984) that is z80 128kb ram and GUI capable running CPM and GSX-80 all competing with PC GUI systems. Nice box with 10mb hard disk and two 400k floppies and mono monitor. <very much about operating systems, as opposed to languages. MS Windows <is the only OS MS programmed ground up, something they only started No. The internal file system (disk operating system <dos>) used on the TRS80 disk basic was amoung the many that preceeded it that was before 1979. The file system was FAT based. <after the A1000. And, I've never seen Windows multitask under 8MB in the <way the Amiga or a UNIXoid computer can. W3x was not preemtive nor very good coopertive multitask. And even with 32mb didn't change that. It would take w95 to get to that point. CPM in the guise of MPM was doing for years by then. I'd also had CP/M multitasking in 64k in '81. No majik. There was also multiuser basic for Altair and NS* had a multiuser version of the NS* OS. <>> and Gates replied that multitasking really wasn't possible in <>> anything under 8 megs of ram. To which the same reporter replied, The PDP-11s running RSTS (or TSX-11) in the 70s didn't multitask either... sometimes with several dozen users usually in 64kb and maybe 256kb of ram. But heck the PDP-8 was doing in before that in 8kw (RTS-8 or os/8). Of course if you want something modern that can multitask in less than 8mb VAX/VMS (runs fair in 4mb!). Allison

28 years, 2 months

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