test-drb December 2006

test-drb@ccmp.vtda.org

225 participants
420 discussions

pointers on what tss/8 really needs to run

by brad＠heeltoe.com

First off, my apologies to the pdp-8 aficionados on the list. While I used 8's back in the day there's a lot I don't know about them. I'd like to understand *exactly* what hardware tss/8 needs to run. My understanding is that it will only run on an 8/I with the following options KT08/I timesharing option MC8/I memory option KE8/I multiply divide option I'm curious because I wrote up a simple pdp-8 verilog description which runs FOCAL and I think it would be fun to run tss/8 also. I'd like some pointers to documents which describe the options needed and details about them. Certainly all of the IF/DF extended memory is needed, since last time I ran tss/8 we had 32k. I'm guessing that this is covered in the MC8/I documents. I'm curious if the KE8/I is the same as the EAE. And I've never seen a description the KT08, all though I can guess what it does (traps any 6xxx as well as halt and switch register access at a minimum, but anything else?) Also, if there is a better list for this sort of question please let me know. I've never read alt.pdp8.whoknowswhat but maybe I should. -brad

17 years, 5 months

Printer ribbon sources

by rcini＠optonline.net

All: I just came across a Tandy printer (DMP105, 26-1276) and I'm having problems finding a ribbon for it. The OEM replacement catalog number is 26-1288 which I believe can be used on the DMP-106, too. I'm wondering if anyone has knows of a suitable replacement or a consistent source for dot matrix printer ribbons for "classic" printers. The ribbon itself looks to be in good condition so I guess I could re-ink it, in which case, what's the best ink for that? Thanks. Rich Rich Cini Collector of classic computers Lead engineer, Altair32 Emulator Web site: <http://highgate.comm.sfu.ca/~rcini/classiccmp/> http://highgate.comm.sfu.ca/~rcini/classiccmp/ Web site: <http://www.altair32.com/> http://www.altair32.com/ /***************************************************/

17 years, 5 months

Driving 220/330 terminated loads

by cclist＠sydex.com

I know the "right" answer to this one--you drive 220/330 ohm terminated loads with 7438-type OC drivers. But, going a bit afield >from "correct", can one drive a single 220/330 ohm terminated load at the end of a 3m length of ribbon cable at 1 MHz using plain old totem- pole STTL output? How about an LSTTL or HCT totem-pole driver? You can assume that the receiver is a 74LS14. Thanks, Chuck

17 years, 5 months

TI CC40

by witchy＠binarydinosaurs.co.uk

Hi Folks, Am I imagining things or was there a discussion very recently about Texas Instruments' little baby? Whilst browsing ebay uk last week I found one that was NIB so naturally I had to have it :) The seller works 5 minutes >from my weekend home so it was even better. Pictures will be up once I've taken them. Serial is #384 so does anyone know how many escaped from Ti Labs? Or did they use a random serial numbering scheme..... Ta, -- adrian/witchy Binary Dinosaurs creator/curator www.binarydinosaurs.co.uk - the UKs biggest home computer collection?

17 years, 5 months

CoCo Videotext version

by joachim.thiemann＠gmail.com

I am not a Coco collector, but I noticed this on the local (Montreal) Craigslist, and figured it might be of interest to people here. Note, I have no connection to the seller. http://montreal.craigslist.org/sys/243510966.html Joe.

17 years, 5 months

CDC power supplies available.

by jos.mar＠bluewin.ch

Just wanted to check before I toss them : I have a 5V 25A and a +/- 15V 3A linear powersupply that were part of some CDC machine ( early seventies i guess ). If anyone needs them... Location : Zurich Switzerland Jos Dreesen

17 years, 5 months

Paper tape supply, was Re: paper tape for GNT 4601

by ajp166＠bellatlantic.net

> >Subject: Re: Paper tape supply, was Re: paper tape for GNT 4601 > From: David Griffith <dgriffi at cs.csubak.edu> > Date: Sat, 02 Dec 2006 15:54:02 -0800 (PST) > To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org> > > >Sidenote: how hard would it be to make a paper tape reader and punch from >scratch? The idea is to have a lightweight unit for playing with my >SBC6120 and perhaps Altair reissue/clone (if and when I get one). > A reader is fairly simple matter lookup the OAE [oliver audio engineering] reader design. However the punch is a mechanical project. The only kitted one was the Heath (H10 I think) punch reader and that was not very reliable or light. Allison

17 years, 5 months

Discussion of large systems

by aek＠bitsavers.org

> The whole line of > 20 years of IBM muscle computers is basically gone. The same is true > for the Burroughs and Univac machines of the same era. It is MUCH worse for Burroughs and Univac. IBM was sold in such high numbers that the probability of some surviving was higher. Both Burroughs and Univac had an active "scorched earth" policies for systems in the field to keep them out of the hands of resellers. I don't know of any Burroughs 5xxx/6xxx systems or Univac 1100's that still exist. John's Univac III is about the biggest old Univac system that I know of. There is also a disproportionate number of large scientific computers that have survived vs business systems. There much fewer in CHM's collection.

17 years, 5 months

ClassicCmp Awareness

by marvin＠rain.org

I've been selling some stuff on ebay and have found a number of people who aren't aware that this listserver exists. Basically, I'm referring them to the ClassicCmp website and they can view the archives and decide if they want to join. It was eyeopening to see that people who have a big interest in this stuff weren't aware of this listserver! I wonder if a link to the Vintage Computer Marketplace would be appropriate to put on the ClassicCmp home page?

17 years, 5 months

HP Time-Shared Basic

by billdeg＠degnanco.com

I was recenlty given a copy of the "A Quick Reference to HP Time-Shared BASIC" Printed 9/1969. It's a pamphlet-sized doc. If anyone would like a copy and it does not already exist on the Internet I will make a PDF and put it up on my web site. The system associated with the guide is the Hewlet-Packard 2000A. Bill D

17 years, 5 months

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test-drb December 2006