test-drb January 2008

test-drb@ccmp.vtda.org

221 participants
430 discussions

by ajp166＠bellatlantic.net

> >Subject: Head alignment for legacy Sony FDD > From: "Peter" <pludikar at sympatico.ca> > Date: Sat, 19 Jan 2008 08:54:15 -0500 > To: <cctech at classiccmp.org> > >Hi, >I've been trying to create a working Sony MPF50W (as found in the HP1650B >logic analyser) from 2 damaged units. One unit had a fried board and the >other unit had physically damaged heads. I moved the heads and track 0 >sensor from the fried board to the other board and I need to do 2 things: a) >confirm that the "new" heads are actually working and b) realign the track 0 >sensor. I'm reasonably sure that the heads are okay, they show continuity >on some of the pins, but I'm not 100% certain that is what I should be >expecting. I can't find any obvious sources of information on where to >probe to see useful signals from the heads or find any procedure to align >the sensor. I have Tony Duel's diagrams of the HP9114 from hpmuseum.net . >Any suggestions on where to find this information or how go about this would >be really appreciated. > >Many thanks >Peter Most heads have two sets of windings. One for trim erase and a second for read/write. The organization varies but the trim is two pins or have one pin in common with R/W and the RW is often a centertapped winding (three wires) so you should see three connections of near zero ohms and a pair that are also near zero OR 4 pins that show near zero (common wire case). The test for alignment usually requires a calibration disk and scope but I've done it by doing reads of a known good disk and "finding the edges" and setting it for the middle. Track 00 is usually less critical so if it happens when the head out and you can boot or read the disk thats usually good enough. Allison

16 years, 6 months

N* HRAM 64K schematics, Parallel Port Schematics, and ZDOS info scans

by brain＠jbrain.com

I was finally able to scan a bunch of HRAM 64, Parallel Port for N* schematics and some ZDOS information into PDF today. As I no longer have a N*, I was wondering if someone here does N* and wants to own this technical information. Jim -- Jim Brain, Brain Innovations (X) brain at jbrain.com Dabbling in WWW, Embedded Systems, Old CBM computers, and Good Times! Home: http://www.jbrain.com

16 years, 6 months

HP 9845 Microprocessors

by accutron＠woh.rr.com

I'm trying to nail down a few bits of information regarding the various hybrid microprocessors contained in the earlier versions of the HP 9845. I recently purchased a large lot of 9845 boards, looks like most of one machine plus the PPU from a second machine. All told, I have four hybrid microprocessors. Two are the 107-pin AEC-variant 5061-3001 processor, one on a revision-A PPU card and one on a revision-B PPU card. The other two are both mounted on a single card, which is presumably a pre-bitslice LPU. Of the two processors on this board, one is a 5061-3010, the other a 5061-3011. From what I understand, the -3010 is the original hybrid used in the 9825, and I read something somewhere that lead me to believe the -3011 is a microcode variant of the standard -3010. Are both of these processors part of the LPU? Most sources refer to the 9845 having two processors, the PPU and the LPU, and I haven't found any that say the LPU itself actually consists of two processors. Is the -3011 just a microcode variant of the -3010? Also, are there any microcode variations between the -3001 on a revision-A PPU card and one on a revison-B PPU card? Regards, Micah Mabelitini

16 years, 6 months

VLSI of classic architectures (was Re: 11/70 board set on e-bay. . .)

by jam＠magic.com

> On 15/01/2008 17:37, James A. Markevitch wrote: > >> Chuckles at the typo.Is the PDP-8 the only classic architecure from the mid > >> 1960's that was made with VLSI components. > > > > IBM 360 (still being made today) > > Is it? The 360 itself is not, but the architecture is, and in multi-GHz parts. > > PDP-11 (LSI-11) > > Definitely not mid 1960s. The first PDP-11 appeared in 1970, and LSI-11 > came out in 1975! Well, the architecture was conceived in April 1969, I believe :-). Guess that's not quite mid 1960's. James Markevitch

16 years, 6 months

copying a GAL/PAL

by chrism3667＠yahoo.com

can someone provide the specifics? I keep getting badgered LOL ever since I announced I own an XT-IDE card. The one I have is pretty simple, just some OTS logic, but for the PAL (or is it a GAL - damn wish I had a GAL-PAL LOLOLOLOLOL). Therefore I need to have a way to duplicate such, so at least I can provide a path for those that want such a card. Of course this will involved desoldering. Not that big a deal, I feel I can lay the component side in a tray filled with cool water (with even a fish pump to course fluid past the pins) and go to town. If I don't need to remove the chip, please let me know. Gracias Amigos! Then again if anyone can provide a known working schematic/plan for such a card, that would be all the better. ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping

16 years, 6 months

Fw: Big Iron (was VLSI of classic architectures)

by mike＠brickfieldspark.org

> > That sounds like a really great project; I've found the website and it > looks interesting. I've always wanted to do something like that with a > mainframe but of course it's hard to find one and find a place to put > it. This kind of thing really inspires me to try and form some sort of > vintage/retro computing club at my university... just gotta find some > space! > Do you have that website url. Mike > > Message: 6 > Date: Thu, 17 Jan 2008 12:26:58 -0800 > From: "John Floren" <slawmaster at gmail.com> > Subject: Re: Big Iron (was VLSI of classic architectures) > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <7d3530220801171226m5a21f15fp45bd29f75ffe60e5 at mail.gmail.com> > Content-Type: text/plain; charset=UTF-8 > > On Jan 17, 2008 11:51 AM, Roger Holmes <roger.holmes at microspot.co.uk> > wrote: >> >> >

16 years, 6 months

MOMS Autograft4

by grant＠stockly.com

I traded about 15-20 hours of linux programming and consulting for two sight unseen computers, a complete Autograft system and an Osborne Executive 1 with manuals and software. Has anyone ever heard of an Autograft system? When I try to turn it on it fails. The hard drive grunts and then it sounds like its releasing a relay or solenoid. I plugged it into a regular desktop power supply and it does the same thing Then the access LED blinks morse code at me. Is there any way I can get it spinning to recover the data? What do you guys recommend? It was frozen last night but its warm now. It was manufactured in 1983. From what I can tell it has: 186 processor 512k RAM 20MB (or possibly 50MB) winchester 512x480 13" RGB monitor for graphics (8 "brilliant" colors the docs say) Wyse terminal for text Autocad 1.4 from Autodesk for CP/M 86 24x36" plotter 11x11 12 button digitizer (a tablet) And there is a receipt for $19,000 in the binder. : ) Grant

16 years, 6 months

40M drive for postage

by rtellason＠verizon.net

>From a private email: > >> D3142 Disk Drive P/N 134-500558-531 and I think I looked that up once > >> and it came back as a 40 meg drive. Has a 17 connectors for some kinda > >> plug in one place and 10 more farther over with about a 3/8 gap between > >> the two groups. Oh, well, hell. Here is a pic attached. > > > > Those connectors are marked as 34 and 20 pin, which means either MFM or > > RLL, depending. I have some of that old stuff around, but don't have any > > near-term plans to use any of it. Dunno anybody else who does, > > either. I can forward a snip of that info to the classic computers list > > and see if anybody wants it, though. Want anything for it? > > Nah, just postage if anyone can use it. I never will. I have the pic here if anybody wants to see it. Can any of you guys use this thing? If so let me know offlist and I'll put you in touch... -- 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

16 years, 6 months

FTGH: SPARCstation 2 HDD on original bracket

by listmailgoeshere＠gmail.com

Hi list, I have here a part number 370-1327-04, which is a 207MB Maxtor 50pin SCSI disk. It's mounted on the right bracket to go in an SS2 - I'm guessing this is probably the same for the 1 and 1+, but I don't know. Is anyone interested in this drive, or even just the bracket, before I pitch it? Usual deal - I'll ship to anywhere as long as you pay the cost. Ed.

16 years, 6 months

SGI Onyx R10K on eBay UK

by james＠machineroom.info

Hi all, I just spotted an R10K Onyx on eBay UK. It's not of any interest to me (had 2 before!) but thought someone here may want to care for it. Item number is 110215756310 Cheers, James

16 years, 6 months

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test-drb January 2008