test-drb March 2002

test-drb@ccmp.vtda.org

292 participants
932 discussions

DSQD Drives (Was: RE: Diags/Boot image for Altos 580)

by dhquebbeman＠theestopinalgroup.com

> IIRC the Floppy on an Altos 580 is DSQD. Am I correct that while different from standard DSDD, they are *not* GCR drives? What other machines might carry these drives, can I hook one up to a standard PC controller in a box running DOS, and then duplicate the disks? > I had one that had the CMI hard drive replaced with a Seagate ST225. So I > know they will take similar configured Hard Drives. I think they will take > 10, 15 and 20 Meg HDs. This is good to know, ST225s still pop up from time to time... -dq

22 years, 9 months

Value of a small VAX farm

by lluu＠ib-group.com

hi I will be interested by the vax 7000 - And also I have a lot of vax 3100 4100 as 800 4100 2100 etc and ds20e es40 etc ... give me a call if you can sale them to me Laurent LUU Account Manager & Trader Compaq Sun Cisco IB Remarketing is a Remarketing Products Compaq Distributor Company. Red Systems IB Limited, London. IB Remarketing SA, Paris. 0044 (0) 207 336 7333 Office London UK 0044 (0) 207 336 6546 fax London UK 0044 (0) 7796 992 664 cell phone UK IB Remarketing 00 33 1 48 19 23 71 Office Paris 00 33 6 60 17 47 49 Cell phone Paris 00 33 6 62 08 15 02 Cell phone Paris www.redsystems.co.uk (under construction) www.ib-group.com

22 years, 9 months

TRS80 Model 1 question

by rcini＠optonline.net

Hello, all: I plan on playing with my old Model 1this weekend so that I can get the floppy drive working. Since I suffer from random bit-rot, can someone tell me which disk operating system shipped with the drive option? My system is a 48k Level II with the Percom controller and drive. I don't have any disks for it any more, but I was going to use the TRS81 emulator to create new disks for it. Thanks. Rich Rich Cini Collector of classic computers Build Master for the Altair32 Emulation Project Web site: http://highgate.comm.sfu.ca/~rcini/classiccmp/ /************************************************************/

22 years, 9 months

Disassembling a Vaxstation 2000

by csmith＠amdocs.com

> -----Original Message----- > From: Andy Berg [mailto:groovelists@yahoo.com] > The poor ST251 looks like it might be done in for... > Originally, it just clicked once when power was > applied + didn't spin up. Was able to get it to spin > up by lubing the bearings, but I think it has many I wonder how long it would last if you actually had to open the thing to lube the bearings anyway.. :) > other issues. Fails a TEST 71 (disk verification > test). Attempting to BOOT using DUA0 as default has it You could try formatting it, then verifying. I'm not sure if that will make a difference. The format command is some other test (72?) which I don't really remember the number for... > making a quiet buzzing noise for a few seconds... > then, tries to boot from ESA0, gives a ?54 RETRY, > tries ESA0 again, etc... Haven't quite gotten around Well, that part is normal. :) If the first device doesn't work, it will switch through the devices in a certain order until it gets to ESA0 at the end. > to setting up a network for it. (Could also be doing > something wrong, too - never had a chance to work with > any VAXen prior to this.) Sounds ok. Incidentally, it really will take just about any "MFM" drive you can stuff in there. You'll just need to re-format it. > Thanks again for everything - you both made things > really easy. :) No problem. 2000s are really nice little machines. I'm glad to seep people (besides me) still using them. Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

22 years, 9 months

LK201 specification

by flo＠uk.thalesgroup.com

LK201 specification: ftp://ftp.dbit.com/pub/pdp8/doc/lk200fs.doc This is a plain text file, not an MS Word document! The specs are also in the VT220 Technical Manual. I've not checked to see whether they are identical. - Paul

22 years, 9 months

offline drives: Re: MVII Diags Chapter 2

by ajp166＠bellatlantic.net

From: Doc <doc(a)mdrconsult.com> >just show a dead drive as "offline"? > I put the original RD54 back in as drive 0 and no longer get the RQDXA >errors from the diags, but both drives 1&2, RD53s, are showing as >offline RD51s. What's up with that? > NOTE: DEC jumpers all RDxxs the same regardless of how many are on the controller {they are cable selected}. If memory is accurate All RDxx should be jumpered for #3. REPEAT ALL DRIVES ARE JUMPERED THE SAME even drive address. I assume the controller is RQDX2 or 3 and the box is BA123 with the 4 drive interface card (M9xxx). FYI: if there is a RX50 on that controller then ONLY TWO RDxx drives can be used as an RX50 uses two drive numbers. If you want three RDxx drives and a floppy then use a RX33 (TEAC FD55GFV, with correct jumpers) OR use two RQDX controllers and associated breakout cards. Watch for upside down cables and or bad cables. Allison

22 years, 9 months

test--ignore

by menadeau＠attbi.com

Michael Nadeau Editor/Publisher Classic Tech, the Vintage Computing Resource www.classictechpub.com 603-893-2379

22 years, 9 months

ZX-TEAM meeting and Webcam

by acme_ent＠bellsouth.net

> From: Hans Franke <Hans.Franke(a)mch20.sbs.de> [Tony Duell wrote] > > And the ZX81 BASIC is so unpleasant (single-key entry -- YUK!) > > Hey, I liked it! Thank you, Hans. I knew I couldn't be the only one ;>) > > Therefore it's probably as easy to start with a bare CPU chip... > > Maybe, but then you have to make a board, and at least a ZX > compatible edge connector for all the great perhipherals ... > So after all, using a ZX81 is just a cheap way to get exactly > this. Exactly. For five or ten US dollars (or free, mostly) you get an easily hacked micro with all the lines available on the expansion connector and a decent built-in BASIC if you need it. Plus 8KB of available address space in the 8-16KB region which is perfectly suited to add-ins such as NVRAM or, my favorite, a disk operating system in ROM. Glen 0/0

22 years, 9 months

Apple II/IIgs bits

by jwbirdsa＠picarefy.com

Available for postage ($3.50 in the US). Condition unknown. Hayes Micromodem II, which Google indicates is for an Apple II. Looks good. No cable, just the card. Applied Engineering Ramkeeper, which Google indicates is for a IIgs. Many of the chips are a bit scratched -- it's obviously been in a pile of boards for a while. This is supposed to be a battery-backed RAM board, but there's no RAM or battery. There's a couple places where it looks like things used to be glued to the board, and other possible damage. Probably not useful except as a source of chips (has ROM revision RK 1.7, and other chips labelled RK1A.N, RK2A.N, and RK3A.N). --James B.

22 years, 9 months

Disassembling a Vaxstation 2000

by csmith＠amdocs.com

> -----Original Message----- > From: Andy Berg [mailto:groovelists@yahoo.com] > I've had a Vaxstation 2000 sitting around here for a > bit, but I've just gotten around to tinkering with it. > Alas, the poor fellow seems to have an ill hard drive. Common problem, I think. > I've managed to get the case open, but... well, this > is rather embarassing... I can't quite seem to figure > out how to get the drive itself out. It's not easy. You'll need to remove the screws in the top of the mainboard, I think. The mainboard should then "lift out" -- probably front first, but it's been a while. Make sure that you don't bend the board. The connectors that stick out under the lip in the back of the system tend to catch on things. It will be connected to at least a power connector and a cable for the disks. Disconnect those. Remember to note their orientation. The Ethernet board, and any ram expanders will be snapped onto the main board with little plastic parts. They'll lift right out with it. All of this is from distant (a year or so) memory, so make sure I'm telling you the right thing before you try it ;) Now, the floppy and hard disk will be attached to the same set of metal plates, and those plates, IIRC, are attached to the rails that hold the drives in place. I think you need to detach the metal drive-plates from the rails, and then take the hard disk off once you have the pair of disks dislodged from the inside of the machine. IIRC, the power supply is "short" -- maybe half the height of the system cabinet -- so you should be able to get access to any screws you need to take out to loosen the above-mentioned metal plates. > I don't believe it is open at the moment, but I think > the layout inside is something like this : > ____________________ > ----Motherboard----- > -------------------- > PS | Floppy > | RD32 HD > ____________________ Kind of like that... :) > The drive is held in by at least a screw or two on the > right-hand side - I can remove those, but it is still > held in by another seeming inaccessible screw and / or > the cabling hooked up to the back of it. Again, take the mainboard out, and you'll have to remove both drives at once. :) Chris Christopher Smith, Perl Developer Amdocs - Champaign, IL /usr/bin/perl -e ' print((~"\x95\xc4\xe3"^"Just Another Perl Hacker.")."\x08!\n"); '

22 years, 9 months

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test-drb March 2002