test-drb February 2008

test-drb@ccmp.vtda.org

236 participants
373 discussions

by roger.holmes＠microspot.co.uk

Any reason nobody picked this one up? Are Apple that hot on copyright infringement 20+ years on? Hi Mark, What country are you in? I have the disks, and a couple of Apple ][ europlus-es, though they have not been powered on for some years. I'm in Kent, England. Roger Holmes. On 18 Feb, 2008, at 18:00, cctalk-request at classiccmp.org wrote: > > Message: 8 > Date: Mon, 18 Feb 2008 10:12:33 +0000 > From: "Mark Firestone" <pdp11_70 at retrobbs.org> > Subject: Apple // europlus > To: "General Discussion: On-Topic and Off-Topic Posts" > <cctalk at classiccmp.org> > Message-ID: > <e23c5a2f0802180212g71f1ab93ife7088befb21d02 at mail.gmail.com> > Content-Type: text/plain; charset=ISO-8859-1 > > Hey guys, > > Someone gave me an Apple // europlus. I don't have any system > disks for it > at all. If I send someone a 5 1/4 inch disk or disks, would this > kind soul > send me a DOS 3.3 system master disk? > > Now if I could get that together, and find a super serial card, I > could > transfer software of disk images to it. > > Take Care, > > Mark >

16 years, 4 months

With all the other crud going on on ebay. . .

by tiggerlasv＠aim.com

Don't forget that, after an auction closes, there is a small window of time where the auction isn't searchable. I've had this happen many times; I went to find an auction; realized it must have closed, and then tried to search it in completed items, but could not locate it. Going back to internet-exploiter "history", I was able to go directly to the auction that I was looking for. . . As for the IMSAI -- I noticed one a few days ago that was up in the $2000's . . . was that the one you were looking for? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=220199733423 T ________________________________________________________________________ More new features than ever. Check out the new AIM(R) Mail ! - http://webmail.aim.com

16 years, 4 months

With all the other crud going on on ebay...

by wh.sudbrink＠verizon.net

what's with the disappearing auctions? The last couple of IMSAI and altair auctions were "removed" almost immediately upon completion. Does anybody know what the final price on the altair 680 with the riser board and memory expansion was? What about the IMSAI that was over $5000 with over a day left? No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.20.8/1288 - Release Date: 2/19/2008 8:47 PM

16 years, 4 months

TU10 tape drive restoration

by djg＠pdp8.net

>I have not looked into it, but if the tacho is producing a slightly too >slow or fast signal, because of the not perfect diameter, would there >not be a trim point to adjust an amplifier that drives the reel motors? > Yes their is. Your supposed to use the special skew tape to set it but setting it with a written tape probably will get it close enough. >I measured 3 of mine and there all over place. > Thanks. .015 difference probably isn't that significant. I'll try 1.83. >>Vacuum switches >This is the biggest problem with the TU10. But we've repaired them >ourself. > How long does this last? I got 4 new switches so I'll try this for the other 4. I like saving money. >>Blower >It is noisy, just like an old vacuum cleaner. > I expected the vacuum noise when running. What I was referring to was more of a grinding/scraping noise when turned by hand. >Do you plan to keep some type of online log on your web site? > There are a lot of things I plan to do. Hopefully this weekend I will actually create a page for it. At minimum I will docuement what I repaired and how. This will be the most complex restoration I have had to do. I'll post when I have something up.

16 years, 4 months

Logic Analyzer pods Re: HP LA Inverse Assemblers for classic microprocessors

by empiretheatre＠btconnect.com

Hi Steve, I don't know if you are still after some of these, but I may be able to help. I am after a favour though myself... I have an HP1631D but it has an EPROM fault. I am looking for someone who can copy the 8 EPROM's from another 1631D and send me the files. I could in return send about 16 or so grabbers. Daniel.

16 years, 4 months

Bubble memory devices

by ajp166＠bellatlantic.net

> >Subject: Re: Bubble memory devices > From: "Chuck Guzis" <cclist at sydex.com> > Date: Tue, 19 Feb 2008 13:44:53 -0800 > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > >A bit of curiosity on my part... > >If one wanted to replace a whole bubble memory card (i.e. complete >with support chips and decoders), would MRAM or FRAM be considered a >suitable substitute? It'd be one heckuva lot faster and drink less >power. Yes and no. yes you can use ram (or flash) as "disk" but the bubble system was addressed and generally run like a FDC with a command-status register and a data register. To have ram look like that you's need some controller and/or hardware. IT would also impact software that was designed to talk to it. Bubble was not RAM is was block accessable storage. >In the same vein, how about MRAM as a core memory substitute? Yes, it's been done. I had an 8E with a ram card, It stayed with the machine when I passed to to someone else. Also PDP-11s (early) could ahve ram or core and I ahve a 16k core stack for a Qbus LSI-11. Allison >Cheers, >Chuck > >

16 years, 4 months

The Apricot Xen

by ball.of.john＠gmail.com

Second to my Personal Iris 4D/20, the Apricot Xen has to be one of the most memorable systems I ever saw when I grew up. I can still vividly remember when my dad had them in his office and whenever I was there I would either bolt for the 4D/20 (They cared so much for the system that they let a five year-old play with it but on the other hand they did give it to me two years ago for nothing. :D) or the Xen that was right next to it. If memory recalls it had the trackball mouse as well as the 3 1/4" floppy drive and a hard drive and best of all it had that keyboard with the LCD panel and the programmable buttons. Sad to say they vanished all one day and since then (a little over ten years) I have been trying to find another Xen for myself. It seems it is not an easy task. Not only were Apricot systems not really liked here in North America but whenever I do manage to find a Xen it is ALWAYS missing either the keyboard or the mouse...or both and don't get me started with the monitor or the power supply. I can never seen to find one. Now that I own a logitech G15 keyboard and have it on my high-spec system I am now even more determined to find a Xen so I can mess around with its LCD panel. Does anyone have one with at least the keyboard and trackball mouse? Since words really can't describe this system, here's info on the system. http://www.old-computers.com/museum/computer.asp?c=501&st=1 John.

16 years, 4 months

secondary FDC on PC with MS-DOS

by lynchaj＠yahoo.com

>From Andrew Lynch: > I searched around a bit and found SDRIVE.SYS which refuses to > acknowledge any of the other FDCs I place in the computer at the > secondary address (IO address $170). I/O port 0170H refers to the secondary *hard drive* address (the primary being 01f0H). The secondary FDC address is 037xH (the primary is 03FxH). Let me look around--I've got several old MS-DOS secondary port drivers kicking around here. A word of warning, however. For a secondary controller using the same DMA and IRQ (2 and 6) as the primary, the primary needs to have implemented the "enable" bit at I/O port 03F2H so it can float its own DMA and IRQ lines when the secondary controller is active. Not all controllers will do this, even though it's documented as part of the standard PC architecture. If you want to check out the operation of your secondary controller, hook a drive to it and find copy of FORMATQM or COPYQM (or 22DISK...) and set up a DISKETTE.CFG file for it to use. In the meantime, I'll look for a good driver. Cheers, Chuck -----REPLY----- Hi Chuck! Thanks to you and Mike S too for replying. I accidentally said $170 for the address but I really meant $3F0 and $370. I had been staring at these IO cards for a while and got confused. Sorry! The primary FDC am using ($3F0) is on a Western Digital ST-506/ST-412/FDC controller combo board. I have been using a variety of Multi IO boards trying to get the secondary FDC to work ($370). My plan is to share the DMA and IRQ lines which *should* work since I won't be using the drives at the same time. If you can find a driver which will let me access the drive from MS-DOS, that'd certainly be helpful. It is possible that the primary FDC is interfering with the enable bit but I will try the 22disk approach and see if that helps. I am kind of surprised this aspect of the project has been as much trouble as it has been. I would have thought the secondary FDC from DOS would have been well explored but there is practically nothing on the internet on the subject. This is easy in CP/M and seems like it would be in Linux too. I learn something everyday! Thanks for your help! Much appreciated! Andrew Lynch PS, I tried the 22disk approach and it worked like a charm. I think SDRIVE.SYS might be the problem. I was able to write a custom DISKETTE.CFG and format the disk in a CP/M format, copy files to it, and get a directory >from the drive attached to the secondary FDC. At least we know the hardware is basically good

16 years, 4 months

secondary FDC on PC with MS-DOS?

by dm561＠torfree.net

-------------Original Message: Date: Mon, 18 Feb 2008 18:47:10 -0500 From: "Andrew Lynch" <lynchaj at yahoo.com> Subject: secondary FDC on PC with MS-DOS? Hi, I am building a test station using an old 486 ISA only computer to test floppy disk drives and old ST-506/ST-412 style hard disk drives. The computer seems to work OK and has a Western Digital ST-506 MFM hard disk controller with a FDC on the card (IO address $1F0). To help with testing floppy drives, I thought I would add a secondary FDC however that is turning out to be much more difficult than I planned. It seems there are drivers required to make floppy drives attached to the secondary controller appear as drive letters under MS-DOS. I searched around a bit and found SDRIVE.SYS which refuses to acknowledge any of the other FDCs I place in the computer at the secondary address (IO address $170). There are some references to a DC2.SYS program but I cannot find it anywhere online. http://www.seasip.info/VintagePC/floppies.html Does anyone know how to add multiple FDCs to a PC so I can have multiple floppy disk drives? Of course, the Compaticard IV would be nice but those are very expensive and almost unobtainable these days. I have a Compaticard I which "sort of" works but the drive gives errors every other time I access it. Thanks in advance for any help -- especially if someone could send me or tell me where I could find the DC2.SYS files. Andrew Lynch ------------------ You could also look for a 4-drive FDC with its own BIOS; I'll dig through the pile & see if I've got one to spare. Meanwhile, try asking on the Vintage Computer forums; there were some mentioned there recently. mike

16 years, 4 months

Does anyone have a high-res pic/scan of a Hayes Chronograph display?

by ethan.dicks＠usap.gov

Hi, all, I was digging through my Hayes Chronograph docs again, and was wondering if anyone out there has ever taken a high-res (1 megapixel or better) photo or stuck the display of their chronograph on a flatbed scanner. I've found several low-res pictures, but nothing hi-res enough to show the alarm and low-bat icons above the shorter digits. Thanks for any pointers, -ethan -- Ethan Dicks, A-333-S Current South Pole Weather at 19-Feb-2008 at 04:20 Z South Pole Station PSC 468 Box 400 Temp -38.6 F (-39.2 C) Windchill -69.6 F (-56.5 C) APO AP 96598 Wind 13.9 kts Grid 40 Barometer 675.8 mb (10787 ft) Ethan.Dicks at usap.gov http://penguincentral.com/penguincentral.html

16 years, 4 months

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test-drb February 2008