test-drb November 2006

test-drb@ccmp.vtda.org

220 participants
452 discussions

by chrism3667＠yahoo.com

Ive learned that many XT-286s were really shrunken ATs, unlike my old ITT XTRA XP. Was the subject really a tiny-AT? ____________________________________________________________________________________ Yahoo! Music Unlimited Access over 1 million songs. http://music.yahoo.com/unlimited

18 years, 1 month

Anyone need some fuse PROMs?

by classiccmp＠philpem.me.uk

Hi, Just got back from the hamfest with a bag of 19x Signetics 82S129 fuse-PROMs and a single 82S23. I'm kicking myself a little because I've just found out that the 82S23 is another fusePROM (32x8 O/C output) and I spent a good five minutes digging out all the '129s thinking the '23 was a standard logic chip. There were at least half a dozen more in the bag that I separated out.. Oh well, live and learn. All the chips appear to be new - the legs are splayed out a few degrees, and there isn't a scratch on them. So the million-dollar question is.. does anyone need any of these things? I might have another dozen or so in the cupboard too, and '82S129 programmer' is currently sitting in third place on my "Master To-Do List" (right after "build something neat to enter into the Parallax SX design contest" and "look into building a USB floppy disc raw-reader/archiver"). Reply either here or off-list if you're interested. Thanks. -- Phil. | (\_/) This is Bunny. Copy and paste Bunny classiccmp at philpem.me.uk | (='.'=) into your signature to help him gain http://www.philpem.me.uk/ | (")_(") world domination.

18 years, 1 month

lisadraw

by aek＠bitsavers.org

> If you look through Lisa code from an application through the OS and > back, there are several layers you have to go through. How much of the Lisa OS has been reverse engineered / documented? I haven't looked at this in a LONG time. A while ago, people were trying to get a simulator running, but it didn't seem to get very far. I know there have been people looking for this stuff for a long time.. After the Lisa group purge ("A players", etc.) happened, very few people wanted to be known as having worked on it. Even on the inside, it was tough to get people who worked on Lisa to talk about it.

18 years, 1 month

Free DEC SCSI cable, centronics 50 male to 68 pin female (HD68?)

by technobug＠comcast.net

On Sat, 11 Nov 2006 00:41:28 -0500, Warren Wolfe <wizard at voyager.net> wrote: > On Sat, 2006-11-11 at 00:47 +0000, Tony Duell wrote: > >>> I've heard them called Amphenol, CHAMP, telco, PBX and RJ21X >>> connectors as well as "Blue Ribbon" (shows my age). But why >>> "Centronics"? >> >> I normally call them 'Blue Ribbon' -- what should be be calling them? >> Amphenol make (made?) a very large range of connectors, so that >> name is >> nowhere near specific enough... > > > It must be that "two great cultures separated by a common language > thing. The big, hooded connectors have been identified well here. > Most > places I have been refer to them as "Amphenol connectors," unless they > are specifically for parallel printers, in which case people refer to > them as Centronics cables. > > The cables made from ribbon cable, with crimp-on square plastic > headers are called, around these parts, "Berg cables" or "ribbon > cables," due to the "Berg connectors," as Berg made most of them at > one > time. Amphenol, the inventor of this type of connector, calls the current connectors "Micro Ribbon". The original connector had connector widths at least twice that of the current connectors and IIRC were called "Blue Ribbon". You occasionally find them on old ('50s) gear - especially old military radios and scientific equipment. The Micro Ribbon 25 pair format was initially used big time by the telecom folks to hook up PBX systems and then transitioned to the computer field where Centronic used the 36 connector version for what became the ubiquitous printer port. Among us old farts the name has stuck whereby we refer to all connectors of that type as "Blue Ribbon" - nothing to do with blue ribbon-cables - where all the newbies call them "Centronics". CRC

18 years, 1 month

ADB "power key always down" plug

by spectre＠floodgap.com

Anyone seen one of these where the ADB power pin is always forced on so that if the computer shuts down unexpectedly, it is forced to reboot immediately? I know I have seen such a product; there are software-hardware combos but I know I've seen a plug that did this just by manipulating the power pin. Obviously it can't reset a frozen Mac, but it could reboot after a power failure even if the Mac's PMU settings were b0rk3d. Failing that, has anyone built one? It seems like it's just a matter of grounding pin 2 unless someone knows better, as shown on this diagram: http://myweb.tiscali.co.uk/whitefiles/b1_s/1_free_guides/fg1mt/pgs/h10b.htm -- --------------------------------- personal: http://www.armory.com/~spectre/ --- Cameron Kaiser * Floodgap Systems * www.floodgap.com * ckaiser at floodgap.com -- "I'd love to go out with you, but the doorjambs need dusting." -------------

18 years, 1 month

ra81's are irking me

by jwest＠classiccmp.org

After swapping out 3 HDA's and 2 servo boards, I had one RA81 working - mostly. For some reason the system wouldn't see it on port A, but it would on port B. Oddness. Anyways, since the day I had it working (and got RT11 loaded on it), the system will no longer see it. I have moved around and changed some of the cabling between the drive cabinet and the cpu cabinet, but I don't see that I've done anything wrong. I put the cabling back the way it was (I could be mistaken) and still no joy. During the basic UDA50 diag it says there are no drives connected (same thing for >>>B DU0). I'm still plowing through the docs (again), but can anyone suggest anything "obvious" that isn't clear in the docs with regards to connecting an RA81 to a UDA 50 that a newbie like me could be missing? I'm up for any input :) Jay West

18 years, 1 month

Apple Tape Backup 40SC question

by compoobah＠valleyimplants.com

I've been talking with someone (the gentleman in Canada who has the A/UX 1.0 media (medium? it's just one tape...)) about getting his drive operational again (gummed roller). We've gotten as far as replacing the capstan with a similarly- sized piece of tubing, and now he's having problems with the tape coming off the reels (no problems on another DC2000 (I think) style drive) I'm at a loss (can't see the setup, either). Any ideas? I've gone over the loose bands problem with him, and it isn't that.

18 years, 1 month

Couple of things for sale...

by evan＠snarc.net

I'm selling a few things that I no longer need. Greatly prefer to sell it all as one unit: - TI CC-40 (new in box, I just don't need it) - Epson HX-20 (I wound up with two, this one is the computer only + microcassette drive, no AC adapter, but it works fine -- selling because I got bought a better one at VCF) - Psion Organiser II XP (new 9v battery, works fine, with 32 rampak and 32k datapak, bought on impulse and don't really need it) Looking for $100 total + s/h. Will consider trades if it's something * really * interesting related to portables. Advertising this elsewhere as well. Please reply OFF-LIST to evan at snarc.net .... Thanks. - Evan K.

18 years, 1 month

Free DEC SCSI cable, centronics 50 male to 68 pin female (HD68?)

by vax9000＠gmail.com

DEC P/N 17-02008-02, No physical damage observed. Not tested. Don't know whether it is DEC specific SCSI cable or a generic one. $5 shipping in the US. See attached photo. vax, 9000

18 years, 1 month

Visible Storage @ Computer History Museum

by legalize＠xmission.com

I flew to San Jose to see The Who in concert (excellent show, btw, I recommend catching them if you can) and had a few hours to kill before the show. So I went down to the CHM to check out the Visible Storage exhibit. Lots of great stuff! There is something about that distinctive smell you get when you walk into a room full of old electronics that is intoxicating! :-) I want to extend a personal thanks to Al Kossow who met me in the lobby and showed me a few 'behind the scenes' areas: his software library storage, the lab where he does restoration work on old tapes, the restoration lab where a crew is currently restoring some old equipment (IBM? SDS? I can't remember) and the big warehouse storage area where they have lots of goodies awaiting restoration and display. I got to see an Evans & Sutherland Picture System II in the flesh for the first time there :-). Definately recommended if you haven't been out there before. -- "The Direct3D Graphics Pipeline" -- DirectX 9 draft available for download <http://www.xmission.com/~legalize/book/download/index.html>

18 years, 1 month

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test-drb November 2006