test-drb February 2003

test-drb@ccmp.vtda.org

337 participants
780 discussions

Virtual vs Physical memory (was Re: Designing around a 6502 )

by dwightk.elvey＠amd.com

>From: "Hans Franke" <Hans.Franke(a)mch20.sbs.de> > >> > A segmented architecture... > >> I have one word to say about segmented architecture... "Ewwwww" > >:) I like segmented systems. It's one of the best concepts for >address space extension. Ok, I also think that the 8086 is one >of the best 16 Bit CPUs (*1) ever, and as the 186 core at the >top of their evolution. > >Gruss >H. > >(*1) There are other great ones, like the 9900. Hi Hans Then you'll love the Z8000. Its segments are non-overlapping ( unless a mmu makes them so ). I like the 186 myself but have to admit that the time for segmented memory has passed, in general purpose computing. Dwight

23 years

Gridcase 1530

by ligkig＠hotmail.com

Dear Sir, Greetings form Geolab! We are formed in 1991 as an independent multi-discplinary Geotechnical, Environmental and Construction Materials Service firm providing engineering and scientific consulting, subsurface exploration and testing services to both public and private sector clients. At this moment, we are using Gridcase 1530 (386) for the purpose of doing our Pile Drive Analysis Test (PDA Test). Due to this computer is an old unit, we frequently facing problem that bother us once we turn on the computer. The monitor always promp the error as stated below: "Invalid configuration Information : Code 02 Strike F1 key to continue" However, once we strike the F1 key, another error will occur named, Disk Boot Errores. We really appreciate if you can help us out in this matter as soon as possible, this computer is really valuable for our department. We hope to hear >from you soon. Thank you for your kind attention. Regards, Ricky Engineer ligkig(a)hotmail.com

23 years

DEC xx2247 keys

by fm.arnold＠gmx.net

cctech-request(a)classiccmp.org schrieb am 12.02.2003: >----------<snip>----------- >Date: Wed, 12 Feb 2003 15:05:43 -0600 (CST) >From: <lemay(a)cs.umn.edu> >To: cctech(a)classiccmp.org >Subject: DEC xx2247 keys >Reply-To: cctech(a)classiccmp.org > >I bought a xx2247 key from ebay. Just in case others are planning to do the >same, the key appears to be an almost brand new copy. There is a *slight* >amount of rust in the areas that were cut away, but other than that it is >nice shiny new chrome. > >I purchased mine for the starting bid of $10, but they then charged me $10 >more for shipping (actual shipping was $4.30), making for an expensive key. Thats a general problem on Ebay, seller tend to cover their listing-costs into the "shipping" or "handling" fees they charge. Your only chance to make this clear is a mail to the seller on this before you bid. Make clear that you will only bid if the seller follows the rates of e.g. USPS or some other shippingcompany. Then you have the choice to take or to leave it. >I called the local locksmith and they will duplicate this type of key for >$6 each. The other thing to note is that the key I obtained from Ebay auction >is stamped Do Not Duplicate, which the original DEC keys (I have 2) do not say. > >I figure they had a original copied a few years back, and added the Do Not >Duplicate just in case a customer needed more than 1 key, so they would >have to pay through the nose for it. On my PDP8E I have a similar key, also having this text. Thatone is original however. So there seems to be both versions to be around. > >Now I see they have the starting bid boosted to $25, for a non-original >duplicate key, what a load of... That way too expensive, hope they don't sell it and come back on the carpet. > >PS: I happen to have the locking mechanism disconnected from a PDP 8/E >power supply, and before i reinstall it, i plan to bring it and the keys >to that locksmith so i can have some cheaper, 'working' copies of the >key made. I like having a key sitting in the lock ready to turn. If others >need a key, let me know and i'm sure I can get you one for a lot less >than that ebay guy. Nice offer! Frank

23 years

DEC xx2247 keys

by pete＠dunnington.u-net.com

On Feb 12, 15:05, <lemay(a)cs.umn.edu> wrote: > I bought a xx2247 key from ebay. Just in case others are planning to do the > same, the key appears to be an almost brand new copy. There is a *slight* > amount of rust in the areas that were cut away, but other than that it is > nice shiny new chrome. > > I purchased mine for the starting bid of $10, but they then charged me $10 > more for shipping (actual shipping was $4.30), making for an expensive key. > I called the local locksmith and they will duplicate this type of key for > $6 each. My local keycutting shop cut a copy for just a little less than that. The key style is quite standard. The trick, of course, is getting the first one :-) If anyone in the UK needs one, I can get them cut. -- Pete Peter Turnbull Network Manager University of York

23 years

IBM drives in a Kaypro

by cb＠mythtech.net

>I kind of hate to ship off my hard found, and not likely to find many more >IMB drives, anything else yall can think of I could safely offer this >person for his kaypro? Any old full height 360k drive perhaps? I have some half height 5.25 360K drives. They are working pulls from PC clones. I don't think I have any full height ones. Some (most?) are black, and many have that little imprinted asterick that designated the 360K "B" drive as opposed to the 1.2MB "A" drive. I don't know if these are IBM branded drives however, as many were probably NOT pulled from actual IBM PCs (some might have been). If you want one, just let me know. -chris <http://www.mythtech.net>

23 years

IBM drives in a Kaypro

by fm.arnold＠gmx.net

cctech-request(a)classiccmp.org schrieb am 12.02.2003: > >----------<snip>----------- >Message: 6 >Date: Tue, 11 Feb 2003 17:53:21 -0800 >To: cctalk(a)classiccmp.org >From: Mike Ford <mikeford(a)socal.rr.com> >Subject: IBM drives in a Kaypro >Reply-To: cctech(a)classiccmp.org > >I got this message from a guy today, and I am just wondering if he is >correct, will the IBM drives work in the Kaypro? > >5.25" full-height, 360 KB floppy drives >(the big black ones)? Do they work? >I'd be able to use them to restore a pair of old Kaypro computers that use >these drives. The "B" drive on each Kaypro appears to >be shot. >----------<snip>----------- > Hi, I have one or two Teac FD50A floppy drives around that I dont need. Contact me per PM if you are interested. Frank

23 years

Kaypro II

by Robert_Feldman＠jdedwards.com

Because of a peculiarity in the Kaypro format (Fred Cisin has gone over this before, but I don't have the details at hand), you must format the Kaypro disk on your target PC for it to work. This formatting can be done on a PC with programs such as Xenocopy, MediaMaster, Convert. The disk formated on the PC can then be used in the Kaypro. You can copy files from native Kaypro disks to this disk, then read it in the PC with the software. -----Original Message----- From: Mike van Bokhoven [mailto:mike@ambientdesign.com] Sent: Wednesday, February 12, 2003 6:03 AM To: cctech(a)classiccmp.org Subject: Kaypro II <snip> - Does anyone know if it's possible to write Kaypro disks with a PC and 5 1/4 inch drive? If not - any hints on where to dig up software? <snip> Mike.

23 years

VHS Tapes as storage.

by knightstalkerbob＠netscape.net

"Andrew Strouse" <kittstr(a)access-4-free.com> wrote: >Hi, I seem to remember reading in popular electronics, about software that >would let you use a vcr to backup your computer. I think it was about 10 >years ago. Does anyone remember or know anything about this. My searches on >google have turned up nothing. Thanks for any help you can provide! > >Andrew Strouse > There was also a hardware/software solution for the Amiga platform, found on Aminet in the disk/bakup dir, VBackup016.lha. "Some days ago I got a message from the german distributor of the "VideoBackupSystem" (Performance Peripherals Europe). They told me, that they think, VBackup looks so similar to the VBS (especialy due to the usage of the same hardware) that VBackup is a violation of the VBS copyright." I may have the older file that has the schematics & software still archived somewhere. -- Bob Mason 2x Amiga 500's, GVP A530 (40mhz 68030/68882, 8meg Fast, SCSI), 1.3/3.1, 2meg Chip, full ECS chipset, EZ135, 1084S, big harddrives, 2.2xCD Gateway Performance 500 Piece 'o Crap, 'ME, 128meg, 20Gig & 40Gig, flatbed. Heathkit H-89A, 64K RAM, hard and soft-sectored floppies, SigmaSoft and Systems 256K RAM Drive/Print Spooler/Graphics board HDOS 2 & CP/M 2.2.03/2.2.04

23 years

DEC xx2247 keys

by pete＠dunnington.u-net.com

> > My local keycutting shop cut a copy for just a little less than that. > > The key style is quite standard. The trick, of course, is getting the > > first one :-) > > Not really... the point of the XX2247 is that a full-service locksmith > should be able to cross-reference that to a set of key depths, Finding a good locksmith who can do that isn't all that easy over here. > Another word to the wise on DEC keys - if you have a newer PDP-11 > (11/24, for example) or a newer keyed VAX (like my 8200) with the > *plastic* lock body - there are no tumblers. A key blank will > operate your machine - DEC shipped an orangish-red plastic key > with those systems, but the older keys (or a blank) will turn the > lock. The plastic keys are actually a slightly different size. All the ones I've seen are beige plastic (but they may be slightly later, mostly >from Alphas). -- Pete Peter Turnbull Network Manager University of York

23 years

Differential SCSI vs. SE ?

by Fred.van.Kempen＠microwalt.nl

All, Doc writes: > I have a couple of DEC Wide-FWD conversion modules. P/N DWZZA-VA > Look 'em up, and if that fits your bill, I'll send you one for > shipping costs. I looked at the DEC StorageWorks documentation, and it seems that I will need the following: :: DWZZB is a Fast Wide Differential to Fast Wide Single-Ended SCSI :: bus extender and signal converter. It is 8 or 16 bit Fast Wide :: Differential SCSI on one side and an 8 or 16 bit single-ended :: SCSI on the other side. DWZZB is SCSI-3 (ANSI X3T9.2-10R3) :: compliant, can handle data rates up to 20 (16-bit) MB per second, :: and operates transparently to SCSI bus. The product fully supports :: all the latest SCSI-3 bus phases as well as all earlier standard :: SCSI compatible implementations, back to SASI. :: :: DWZZB is bi-directional in operation and can be cascaded. A :: maximum of two can be attached to a bus in a series. Termination :: on the single-ended side is user selectable. The 16-bit fast wide :: differential side features user removable resistors. DWZZB handles :: the more powerful 16-bit SCSI buses as well as 8-bit buses and :: handles data rates up to 20 MB per second on Fast SCSI. It is :: fully compatible with 2- to 5 MB per second data rates of earlier :: SCSI interconnects. It extends SCSI buses from 3 or 6 meters to 25 :: meters using synchronous transfers. :: :: DWZZB can be used to connect the widening range of available :: differential SCSI storage devices and subsystems to single-ended :: hosts. No changes are required to existing devices or software; :: the DWZZB does not occupy a SCSI bus node According to the document, I'd need the :: DWZZB-AA Standalone Product-includes built-in universal power :: supply for general purpose SCSI bus length and signal :: conversion needs, can be used with any SCSI-2 :: compatible device. or the :: DWZZB-MA Module for OEM use-includes basic module that operates :: at 20 MB per second and is fully ANSI compliant for :: embedded applications (power suppler and packaging to :: be ordered separately by OEM or system integrator). Does anyone have some of these available? Thanks bunches, Fred

23 years

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test-drb February 2003