test-drb April 2000

test-drb@ccmp.vtda.org

159 participants
427 discussions

by rcini＠msn.com

Hello, all: This weekend I finished archiving my Mac diskette collection. I copied them to the hard drive of my Mac SE as a safety maneuver. Once I have a little mo re time, I'll make images of them on the gs, move the images to the PC and b urn a CD of them. Anyway, I found two diskettes which have unrecoverable errors. If anyone ha s these that they can image and send my way, I'd appreciate it: Microsoft Basic Interpreter, version 2.10 (single disk) Microsoft Basic Interpreter, version 3.00 (disk 2 of 2) Thanks again. Rich [ Rich Cini [ ClubWin!/CW1 [ MCP Windows 95/Windows Networking [ Collector of "classic" computers [ <http://highgate.comm.sfu.ca/~rcini/classiccmp/> <================ reply separator =================>

25 years, 1 month

8-bit IDE

by allisonp＠world.std.com

>I seem to remember that the IDE standard that I read said that the >command/status registers were all 8 bits (and mapped to the lower 8 data >lines). Only the data register was 16 bits, and the drive would assert >I/OCS16 when that was accessed and at no other time. Of course I have no >idea how modern drives handle this... This is still true for all the ones I've worked with (up to 528mb). Based on how the larger ones work in older systems they should be identical. The emulation is supposed to be WD1003 controller and based on the work I've done with them it rings true. This is why every 8bit system example you see the data path is folded somehow to 8bits. While reading the spec I discovered that Set_IO_8bit command and did a, Wow this will help. Never could make it do what is written in the spec. I suspect the drive never read the spec. If it worked I'm sure the 8bit community like those that did the GIDE, COCO IDE and others would have jumped on that. Allison

25 years, 1 month

Lubing Shugart 800,801's?

by CLASSICCMP＠trailing-edge.com

I've been sorting through a large pile of Shugart 800's and 801's here, and many of them have goo on the head stepper lead screw. It looks like white lithium grease, undoubtedly put there by a previous owner or all-thumbs tech, as the Shugart manuals say (section 3.3): Do not lubricate the SA800/801; oil will allow dust and dirt to accumulate. However the goo got there on the leadscrew, it's so thick now that it's quite difficult to turn it - not only is the stepper motor not up to the job, I can barely turn it by hand in some cases. I have found that "Liquid Wrench" (yes, that stuff you get at the auto parts store) does a pretty good job of at least softening the goo temporarily, enough so that I can actually run the drive through diagnostics, but eventually the solvents evaporate and I'm left with thick goo. Is there an easy way to clean this goo off without completely disassembling the stepper motor/leadscrew assembly and doing the subsequent realignment? I can go in and do a half-assed job of cleaning the goo off the threads with Q-tips and skewers, but there's really a lot there and this doesn't get it all. -- Tim Shoppa Email: shoppa(a)trailing-edge.com Trailing Edge Technology WWW: http://www.trailing-edge.com/ 7328 Bradley Blvd Voice: 301-767-5917 Bethesda, MD, USA 20817 Fax: 301-767-5927

25 years, 1 month

Creative/Panasonic interface spec.

by peter.pachla＠wintermute.org.uk

As an aside to the 8-bit IDE thread, I was wondering whether anyone knew where I could find the specification for the Matsushita CD-ROM interface used on Panasonic and Creative Labs drives? I have a "CR-562-B" I'd like to interface to a non-PC machine you see.... TTFN - Pete. -- Hardware & Software Engineer. Sound Engineer. Collector of Arcade Machines, Games Consoles & Obsolete Computers (esp DEC) peter.pachla(a)wintermute.org.uk | www.wintermute.org.uk --

25 years, 1 month

CPU upgrades, pt. II

by SUPRDAVE＠aol.com

In a message dated 4/14/00 11:30:19 PM Eastern Daylight Time, allisonp(a)world.std.com writes: > Heres a PS2/50z question. > > Mine only has 1meg, looks like 72pin simm but none I have seem work. > All of them happen to be 8x32 (16chip). > > There is only one SIMM socket. What is the limit for ram (max)? > Where can I get something bigger than 1mb? > > As my internal network progresses this box has value as I have a SMC 10bt > NIC for it. I figure OS/2 warp V3 or Win3.1 would be a good os for it. > Being 286 there are few unix based OSs with a networking that run well on > it. > > That and its just too silly not to. the only version of OS2 that will work on the mod50 is 1.3. any OS2 version with built in windows support requires 386 or higher. you can put in various memory cards to goto max supported mem of 16meg. plus, the hard drive has bus attachment with only 160meg size being the biggest i've seen. DB Young ICQ: 29427634 view the computers of yesteryear at http://members.aol.com/suprdave/classiccmp/museum.htm --You can lead a whore to Vassar, but you can't make her think--

25 years, 1 month

Nuke Redmond!

by allisonp＠world.std.com

-----Original Message----- From: Peter Pachla <peter.pachla(a)wintermute.org.uk> > > Actually the documentation is good but also there is tons of it worse > >than the vax grey wall if you try to get it all in one place.... > >That's very interesting, both the local college and factory I worked at had >support contracts with M$ but we were unable to get much more information >than what comes in the "user guide" out of them. Between technet Cdroms and microsoft press I have far more info about NT3.51 then I can possible use and yet I can't find what I need when (or even around when) I need it. it's so convoluted and random as to be useless. The gray wall at least has a useful index and the structure for the gray is the same as the orange before it. But then again you pay $3000 for VMS! Then again I paid nearly that for NT4 and 50 clients... and got that horrid 0.250 inch thick thing the call a book and all the helpfines I can stand on CDrom. >I must admit, I'm a little concerned with the way things are headed in the >Linux world right now. But then at least the underlying OS is lean and >stable and you can pare down your installation any way you want. My recent >Win2K test installation, OTOH, came in at well over 600Mb, and insisted on >installing piles of stuff which I neither want nor use (like the >accessibility options) with no way of uninstalling them....without going to >a LOT of trouble anyway. True, and all the bugs too! Thats why I went with NT4, it's finally mature. Allison

25 years, 1 month

Acorn A4 website?

by pete＠dunnington.u-net.com

On Apr 2, 19:44, Peter Pachla wrote: > Actually, do you know of any sites which cover the A4000? > > I got one about 6 months back, and despite asking in the appropriate > newsgroups have been unable to find any useful sites on the web thus far - > all the ones I was pointed at were either no longer there or were of > manufacturers of hardware for RiscPCs.... > > It's a nice machine, but of little use with nothing but the OS installed. > :-( True :-) I've possibly got things that you might have a use for. It depends on what you're interested, obviously. What would you like to do? Is there any extra hardware (I expect not much, as an A4000 is baically an A3000 re-boxed)? -- Pete Peter Turnbull Dept. of Computer Science University of York

25 years, 1 month

Marquette "MUSE"--DEC mini/file server circa 1986-88

by ip500＠roanoke.infi.net

Anyone know anything about the above captioned computer??? It's a beast! Big HEAVY! upright tower system 27" tall X 27" deep with a HUGE power transformer in the bottom of the case. Model D171. Main components are DEC Backplane marked "H9275A", processor card "M8192" bunch of other non-DEC cards in there as well--SIGMA, EMULEX, couple of unmarked ones. Powers up, HD blinks, has a built in tape drive. Did a search for Marquette and they are now GE/Marquette--medical/EKG,EEG monitoring stuff. Is this some sort of rebadged DEC system or a totally custom ie: worthless medical gadget....looks promising. Thanks, Craig

25 years, 1 month

XXDP+ LL Formatter on RX50/RX33

by pete＠dunnington.u-net.com

On Apr 17, 12:15, Jeffrey l Kaneko wrote: > On Mon, 17 Apr 2000 12:35:56 -0400 (EDT) allisonp(a)world.std.com writes: > > > Has anybody ever ripped the Low Level formatter > > > from the XXDP+ diskpack and put the needed components > > > onto a floppy (of some sort)? [...] > > It's doable. You need to create a bootable XXDP disk and copy the > > required formatter to it. not much more than that required. > > I figured as much; I was just probing to see if anyone had already > done it. Yes, DEC did: ZY003P3 Field Service Tests disks for the microPDP-11 series, contains 4 Field Service Test RX50's (CZXDnB0 where n = 1...4) and a CZUFB1 disk which has the monitor, menu, help text, UPD2 and assorted tests including ZRQA?? and ZRQC?? I've also got a pair of rather later XXDP 2 disks from 11/53 systems, which have XXDPXM, XXDPSM, DRSXM, DRSSM, DIR, assorted drivers, UPDAT, XTECO, DXCL, SETUP, HELP. One disk also has ZRQA??..ZRQF?? and the other has VDHA??..VDHE??, VMSA??, ZTKA?? and ZTKB?? -- Pete Peter Turnbull Dept. of Computer Science University of York

25 years, 1 month

8-bit IDE

by allisonp＠world.std.com

>Frankly, the reason I'm exploring this is because with the 8-bit mode, I >don't have to buffer the data at all beyond the on-board data-in and data >out buffers at the bus interface. The board I'm using to host the thing is handy but that feature is not there. >From what I read in the standard, this is a normally selectable operating >mode for the interface. What's more, only the smallest of drives would be >appropriate for CP/M on the S-100, since CP/M supports, at most, 120 MB, Actually it supports 16 drives of 8mb each for CP/M 2.2 and 32Mb for CP/M3. P2dos, Novados, SuprBDOS all support files to 32mb and drives to 1gb. BUT, the logical drive to physical drive map does not have to be static. For example you could only have drives C/D/E/F as mapped to 8mb logical drives. Drive C: could be partition 1 and a fixed mapping. Drives D/E/F could be mapped to floating partitions anywhere on a very large drive. I supported two 71mb MFM drives this way back in 87 under CP/M2.2. >handle that much. Back when I used CP/M every day, I owned the largest hard >disk system on CP/M that I'd ever seen, at 44MB. Obviously you've never seen many of the systems I ran or have aquired. Likely the 44mb limit was based on inavailability of really large drives. Even my AmproLB has a 45mb SCSI on it and I plan to bump that up to a 160mb. The current system I'm building I'm planning will have IDE 250mb drive. Space is handy as I can have a 8mb partition for pascal and another for C or whatever. >notebook drives should cost about $5-10, which is acceptable. Clearly, There are plenty for under 25$. Though you have to decide on 9.5mm, 12mm or 17mm thick models. Allison

25 years, 1 month

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test-drb April 2000