test-drb January 2005

test-drb@ccmp.vtda.org

254 participants
551 discussions

by dhbarr＠gmail.com

Eep, can't believe I left that out: On closer inspection, I have: * A80386DX-20 (SX214) * A80386DX-20 IV (SX217) * A80386DX-25 IV (SX133) * A80386DX-25 IV (SX218) -dhbarr. ---------- Forwarded message ---------- From: Tothwolf <tothwolf(a)concentric.net> Date: Sun, 9 Jan 2005 02:06:09 -0600 (CST) Subject: Re: Newish Parts To: "David H. Barr" <dhbarr(a)gmail.com> On Sat, 8 Jan 2005, David H. Barr wrote: > I have sitting on my desk, taking up space: > > * 4 Intel i386 processors What speeds are the cpus? I'd like to find some 387 math processors eventually, but I've not been looking very hard. -Toth

19 years, 11 months

"Antique" Apple II e Computer, Manuals, Books

by jesnyder＠iastate.edu

Greetings I am doing some housecleaning, and re-discovered that I have an old Apple II e computer (with monitor, disk drive, and keyboard), and a big box of software, manuals, and books for it. I am not a home computer hobbyist (just a computer user) and have no use for it, but it would seem a shame to just throw all the stuff into the dumpster. I am not really trying to sell it or anything, just see that it gets to someone who is interested in it. How can I find if there is someone interested in it, who I could give it to? Thanks for your help, John jesnyder(a)iastate.edu (515)-294-4312 (university) (515)-232-8824 (home)

19 years, 11 months

RTL Logic

by Watzman＠neo.rr.com

I have old Motorola and TI data books from the period that do have RTL chips in them. There is no chance of scanning them, they are several thousand pages long (3" of very think paper), bound, and odd-size. But if anyone needs info on a very few specific chips, I could look them up.

19 years, 11 months

RTL Logic

by melamy＠earthlink.net

well, I design by specifications. The TI specs say that the short circuit current for 74xx series is 18ma which is also not within specs for the general output current capability of 16 ma. Transient shorts like this are a great way to generate power supply noise. I guess I never applied any type of "preliminary hackery" to systems I have developed. -----Original Message----- From: der Mouse <mouse(a)rodents.montreal.qc.ca> Sent: Jan 9, 2005 5:15 AM To: cctalk(a)classiccmp.org Subject: Re: RTL Logic Except that totem-pole outputs usually have just a transistor to ground, but a transistor and resistor to Vcc. This means that the one driving the signal low will win, and, provided not too many outputs are wired together, it will sink the current without damage. (I've actually built circuits that depended on this, though I've never liked it and never considered it suitable for more than preliminary hackery. I've also always never done it for anything where the conflict will last more than nanoseconds, as when building an ~R/~S flip-flop out of two cross-coupled inverters rather than the more usual NANDs or NORs.)

19 years, 11 months

Bondwell SX

by CCour79992＠aol.com

Greetings: I saw on the webpage a question and answer exchange about putting an external monitor on the Bondwell 386 310SX. I also have the same problem, but my screen has completely died so I cant see what I am typing to get to the prompts to switch it to "external." Any chance you could "talk" me thru the keystrokes from power up and perhaps I can work it "blind"? Thanks for any help you can give. Chris in Va.

19 years, 11 months

Programs written in MIX (MIXAL)?

by tomj＠wps.com

Does anyone know of any computer language processors (algol, basic, fortran, pascal, etc) written in MIX eg. MIXAL, Knuth's mythical machine? Or MIXAL written in MIX (eg. a MIXAL that compiles itself)?

19 years, 11 months

Collectors in NY, NJ, DE, PA, MD ....?

by news＠computercollector.com

Hello to any mid-Atlantic collectors... a few of us are thinking about starting a user group of sorts. To start, the people who run the Trenton Computer Festival (April 16-17, www.tcf-nj.org) said we can have some free exhibit space. This year is the show's 30th anniversary, so my idea is that a few of us would each bring a few old computers, and we'd have a display where the show's attendees can experience what computing was like 30-ish years ago. It's be a great way for regional collectors to meet in person, and a great way to get others involved in our hobby. (As I was a few years ago, I know there are many people out there who have old computers, but who just don't realize that they're part of a bigger hobby.) If anyone's interested, please contact me ** OFF-LIST ** at news(a)computercollector.com. - Evan ===== Tell your friends about the Computer Collector Newsletter! -- It's free and we'll never send spam or share your email address -- Publishing every Monday(-ish), ask about writing for us -- Mainframes to videogames, hardware and software, we cover it all -- W: http://news.computercollector.com E: news(a)computercollector.com -- 642 readers and counting!

19 years, 11 months

Disk drive technology

by tomj＠wps.com

Stumbled upon this while looking for something actually useful (eg. disk drive reliability data -- yeah right). Its more or less market hype, mainly the forward projections, but the interesting part are some good drawings of head topology, density-over-the-ages charts. Good drawing of perpendicular head design. IBM by way of Hitachi. http://www.hitachigst.com/hdd/hddpdf/tech/hdd_technology2003.pdf It's an ugly old PDF, sorry.

19 years, 11 months

Newish Parts

by dhbarr＠gmail.com

I have sitting on my desk, taking up space: * 4 Intel i386 processors * 3 Intel Above Board Plus 8's (non-IO version, 2MB installed) 16 bit ISA cards Not really VERY old (circa '90) but if anyone wants, they can have. The 386's have just been stuck in some foam for about 6 years, but the memcards are new, in box, with 5.25 drivers and manuals (two still shrink-wrapped!). They say they're PC / XT / AT compatible, I think (not at my desk right now). They have a mode to work in an 8-bit slot, IIRC, and can be configured as extended or standard mem. Regards, -dhbarr. PS: Of course these are free, and shipping should be nominal.

19 years, 11 months

8-bit ISA SCSI (was Re: Possible to speed up I/O subsystem of5150?)

by acme＠gbronline.com

----- Original Message ----- From: Jim Leonard <trixter(a)oldskool.org> To: General Discussion: On-Topic Posts Only <cctech(a)classiccmp.org> Cc: <acme(a)gbronline.com> Sent: Thursday, January 06, 2005 6:06 PM Subject: Re: 8-bit ISA SCSI (was Re: Possible to speed up I/O subsystem of5150?) > Got the card, but didn't come with a driver diskette. Am I going to be able to > use this controller as the only I/O in the system? (ie. I can boot off the > card's BIOS, yes?) Absolutely. If you are installing the card in an AT-type system with a built-in BIOS setup program and a table of hard drives, you may have to set the hard drive types to "none" in the BIOS. Before bothering to do that, though, I'd suggest just sticking the card in the system, hooking up a SCSI hard drive, and powering up. Most likely this will work with no hassle. The only time I needed the driver diskette was with SCSI CD-ROM drives. If you want a copy let me know. Later -- Glen 0/0

19 years, 11 months

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test-drb January 2005