test-drb

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101090 discussions

by owad＠applefritter.com

>I've got this MAC 80MB SCSI disk drive which seems to work quite well. What >I wanted when I got the thing, was the box it lives in. On close >examination, I can't find the way to open the thing. The thing is of little >use so long as it is not useable as a SCSI box. It's the right size, etc, >but I want to put something useful in it. > >Does anybody know how it opens up? I think there are tabs in some of the vent holes on the side. (at least, I seem to recall that's how their tape drive was. Sneaky. Tom ------------------------------Applefritter------------------------------ Apple Prototypes, Clones, & Hacks - The obscure, unusual, & exceptional. ---------------------<http://www.applefritter.com/>---------------------

26 years

Mac Disk Drive

by SUPRDAVE＠aol.com

In a message dated 3/24/00 5:11:56 PM Eastern Standard Time, edick(a)idcomm.com writes: > I've got this MAC 80MB SCSI disk drive which seems to work quite well. What > I wanted when I got the thing, was the box it lives in. On close > examination, I can't find the way to open the thing. The thing is of little > use so long as it is not useable as a SCSI box. It's the right size, etc, > but I want to put something useful in it. > > Does anybody know how it opens up? you didnt give enough detail to say whether its an apple brand external scsi drive which fits perfectly under a plus or se. if it is, there are tiny slots in the sides that you have to push a screwdriver into to release some tabs. very tedious, but no easy way to do it. DB Young ICQ: 29427634 view the computers of yesteryear at http://members.aol.com/suprdave/classiccmp/museum.htm --You can lead a whore to Vassar, but you can't make her think--

26 years

PDP-1 and PDP-4 architecture????

by IVIE＠cc.usu.edu

>I am looking here for info about the differences between the PDP-1 and PDP-4 >architecture. Bell & Newell's out of print book about computer architecture runs through both architectures (as well as many others). Unfortunately, I don't have a copy so I can't be more specific. I can't even find the photocopies I made of this and other information (I have a couple of large three-ring binders chock full o' architecture descriptions ranging from EDSAC to modern stuff; but my office has moved a couple of times since then, so I've misplaced them). > Can PDP-1 software run on a PDP-4? No. The PDP-4 was designed to be able to use PDP-1 memory and I/O devices (IIRC), but the instruction set is different. The instruction set of the PDP-4 is essentially that used by the PDP-7, PDP-9, and PDP-15; the Bell&Newell book (IIR the source C) claimed the primary difference between the PDP-4 and the PDP-7 was that the PDP-7 used ASCII I/O devices while the PDP-4 used a six bit code. The true mystery is, of course, the PDP-3. It was allegedly a 36-bit version of the PDP-1. I've seen one source that had a drawing of the word format for the PDP-3, but no other information (the source was an "encyclopedia of computers" circa 1960 that was composed of two-page descriptions of each machine which appeared to be taken from the marketing literature for the machine. The PDP-3 was listed, a word format was given, and a couple of trivial benchmarkish statistics; time to perform an add, IIRC. I have a copy of the blurb in the aforementioned three-ring binders which I can't find). Rumor has it that a DEC customer built a PDP-3, but DEC never did. Roger Ivie ivie(a)cc.usu.edu

26 years

PDP-1 and PDP-4 architecture????

by dylanb＠sympatico.ca

I am looking here for info about the differences between the PDP-1 and PDP-4 architecture. Can PDP-1 software run on a PDP-4? john

26 years

looking for Hazeltine terminals

by mcguire＠neurotica.com

Hi folks, I'm looking to acquire two models of terminals made by Hazeltine, the 1500 and the Esprit, in good operational and cosmetic condition. I used each of these for a long time many years ago and I'd like to keep one of each for sentimental reasons. Does anyone on the list have one that they'd be willing to part with? I'm willing to pay a reasonable sum. Please let me know. Thanks! -Dave McGuire

26 years

PDP-11/23 deskside machine

by mbg＠world.std.com

>than the physical. RT-11 doesn't, it does swap jobs to a disk (or VM:). It only swaps to SY... if you're booted from the virtual disk (VM), then that is where it swaps... Megan Gentry Former RT-11 Developer +--------------------------------+-------------------------------------+ | Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com | | Unix Support Engineering Group | (home): mbg!world.std.com | | Compaq Computer Corporation | addresses need '@' in place of '!' | | 110 Spitbrook Rd. ZK03-2/T43 | URL: http://world.std.com/~mbg/ | | Nashua, NH 03062 | "pdp-11 programmer - some assembler | | (603) 884 1055 | required." - mbg | +--------------------------------+-------------------------------------+

26 years

PDP-11/23 deskside machine -DAMN

by hofmanwb＠worldonline.nl

The program was distributed by the author (Sytze Zijlstra) at the PDP11 Sig Decus Holland. It is very easy to use and works well. Wim Hofman ---------- > From: healyzh(a)aracnet.com > To: classiccmp(a)classiccmp.org > Subject: Re: PDP-11/23 deskside machine -DAMN > Date: Friday, March 24, 2000 8:27 AM > > > I boot a XXDP+ disk image from an emulated TU-58 on a PC running the > > emulator program from Sytze Zijlstra This emulator is also very useful to > > transport data between PC and PDP-11. > > > > Wim Hofman > > What emulator program? I don't believe I've heard of this one. > > Zane

26 years

Resetting C= machines with non-standard implements (was Re: Are you sure the 6550 is dead?)

by ethan_dicks＠yahoo.com

--- Philip.Belben(a)powertech.co.uk wrote: > > > > >> The old PETs don't AFAIK have the internal expansion connector - they have > >> an edge connector sticking out at one side. Very useful for toggling > >> RESET with a pair of tweezers! > > > > Don't miss! > > If I've got to the point where I need to hit RESET, it doesn't matter. It doesn't matter to the software, but there's the risk of shorting things together that don't want to be shorted. > Occasionally I corrupted I/O registers and disabled the interrupts that > serviced the keyboard. You'd better not miss when toggling IRQ with the > tweezers! I used to reset my development C-64 with a paperclip that I bent into a hair-pin shape with a .3" or .4" spacing to fit the proper pins on the expansion connector. I even melted a drinking straw and wrapped it around the top of the loop for a "handle". It was my programmer's reset for years. -ethan ===== Even though my old e-mail address is no longer going to vanish, please note my new public address: erd(a)iname.com The original webpage address is still going away. The permanent home is: http://penguincentral.com/ See http://ohio.voyager.net/ for details. __________________________________________________ Do You Yahoo!? Talk to your friends online with Yahoo! Messenger. http://im.yahoo.com

26 years

looking for Hazeltine terminals

by mcguire＠neurotica.com

On March 24, allisonp(a)world.std.com wrote: > > I'm looking to acquire two models of terminals made by Hazeltine, > > the 1500 and the Esprit, in good operational and cosmetic condition. > > I used each of these for a long time many years ago and I'd like to > > keep one of each for sentimental reasons. Does anyone on the list > > Your missing the 1000 (early glass tty): > > Also 1400, 1420 1500, 1510, 1520, 1552(vt52 clone). Oh yes, I'm familiar with most of the line...I'm only really interested in keeping the two models that I worked on the most. I had a 1500 on an IMSAI-8080 (with a CCS Z80 CPU board) CP/M machine, and the Esprit was the console on my pdp11/34a running RSTS/E. If I hadn't paid more attention to those machines than my high school teachers, I'd surely have been flipping burgers with the rest of my high school friends. And now, 13 years after graduation, some of them are actually *managers* at McD's! WOW! ;) -Dave McGuire

26 years

11/34 programmers panel available

by wrking＠tsoft.com

A couple of months ago someone posted a message to this list saying that they were looking for an 11/34 programmers panel. I have one available, please contact me. Bill King

26 years

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