test-drb

test-drb@ccmp.vtda.org

101090 discussions

by peacock＠simconv.com

>Hmm; I'm glad to hear that the N* isn't *too* fussy about the memory >cards it plays with - it makes the job of finding spares a whole lot easier! > >Regards repairs to the existing boards, I may well end up admitting >defeat in the short term - if it's a duff 4027 chip, I'm stuffed - >there's 32 of 'em to choose from! > Now that's where an IMSAI front panel really paid off. You put in the card, stored an FF in the first location, the panel display show EF instead...bingo, the RAM on D4 is bad (or more likely a bent pin or upside down in socket). Jack Peacock

28 years, 5 months

Northstar S100 compatability

by peacock＠simconv.com

>Well, the mains transformer is wired OK; it happily takes the 240V in and >spits out something (?) like 8VAC, 16VAC and respectively. The 16VAC then >goes through what I assume is a bridge rectifier, and out comes approx. >+32VDC and -32VDC. The snag *is* that it's meant to be supplying 16, not >32v! The 8v rail, fortunately, is fine. Are you sure you measured from the right ground? I have never seen a bridge rectifier that would take 16VAC going in, then provide +/-32VDC coming out the DC side. Connect your ground lead to pin 50 on the S-100 bus (the rightmost side, pins 50 and 100 are signal/power ground). You should see +8VDC (roughly) on bus pin 1/51, +16VDC on pin 2 (or 52, I forget which, don't have a schematic in front of me), and -16Vdc on pin 52 (or pin 2). If you still show +/-32VDC, look at the transformer, something's wrong there (you would have a 120V xfrmr instead of a 240V one). Jack Peacock

28 years, 5 months

Crisis Over, Back To Your Homes, Wanted: Apple ][ Card Info

by photze＠batelco.com.bh

The list is, more or less, on topic, and I've taken this oppertuinity to ask a question: My Apple ][ has a Language card called a "Pocket Rocket". Now, what does this do? Does it let me write in such languages as Pascal, C, or, on my ][+, Integer BASIC? Also, is RAM expansion avaible to increase RAM to 128K (As I've heard that it could go to...) Thanks, Tim D. Hotze

28 years, 5 months

Symbolics 3650..

by sinasohn＠ricochet.net

> :[Symbolics 3650] A couple of resources I found online... The Online Symbolics Museum: http://www.brightware.com/~rwk/symbolics/ Symbolics Technical Summary: http://www.lavielle.com/~joswig/symbolic-computing.html --------------------------------------------------------------------- O- Uncle Roger "There is pleasure pure in being mad roger(a)sinasohn.com that none but madmen know." Roger Louis Sinasohn & Associates San Francisco, California http://www.sinasohn.com/

28 years, 5 months

Northstar S100 compatability

by allisonp＠world.std.com

<Out of interest, what would a N* want with 256K anyway? Presumably, <whatever OS it is running is pretty hefty stuff! It ran NSdos which was pretty lightweight. and didn't care much about how much ram there was. It was possible to run multiuser NSdos. CP/M was commonly ported to it and 2.2 could be banked if you weren't faint of hear and CPM-3 was designed for banked operation. MPM was a multiuser cpm that also could use banked ram while running multiple users. Mine has 128k in it at current, running CP/M-2 banked. Allison

28 years, 5 months

Catweasel, etc.

by jfoust＠threedee.com

"Richard A. Cini" <rcini(a)email.msn.com> > Here's my idea. Why can't we contact those vendors that are still in >{corporate} existence and who at one time produced interesting and useful >hardware or software (examples would be MicroSolutions, or CentralPoint), >and try to purchase, for nominal $$$, the rights to produce and distribute >these goods in small quantities. Because as soon as they think there's a buck to be made, the price will become prohibitive. :-) There's some hope for classic computers from the Catweasel people. In their FAQ, they admit knowledge of eight-inch drives, and would be willing to add support for them and their disk formats if someone loaned them a drive and some disks. The problem? They're in Germany. Andrew De Quincey <adq(a)tardis.ed.ac.uk> recently posted some messages to various Usenet classic groups regarding a project where he's capturing the bit-level signals from a drive, and using a Java program to decode it to higher levels of representation. I've been improving my ANSI C tools for getting directories and bursting disk image files for UCSD Pascal and RT-11. Right now they work on logical-order disk images, but I want to improve them to read physical-sector-order images, as well as Anadisk's extra eight-byte sector-header format. Sadly, Anadisk doesn't work under a WinNT command shell, I have to boot back to DOS. - John Jefferson Computer Museum <http://www.threedee.com/jcm>

28 years, 5 months

Vic-20 heads-up

by jfoust＠threedee.com

Uncle Roger <sinasohn(a)ricochet.net> wrote: >Sorry for the on-topic post, but, I just wanted to let folks know that >there is a guy (Ward(?) Shrake) who is archiving Vic-20 cartridges. >This sort of serious, practical preservation is definitely to be commended. What is he doing to address the question of copyright? Might not some of these titles be owned by someone? - John Jefferson Computer Museum <http://www.threedee.com/jcm>

28 years, 5 months

Cleaning up classic books

by Marty＠itgonline.com

First, you should appeal to these thrift shops to use a pencil. Some thrift shops I haunt will pencil in the price on the inside cover, then to thwart repricers, pencil it in again on a different page. I've never had any luck removing grease pencil and have ended up smearing it. I suggest you look up the Library of Congress on the web and email them for advice if they have nothing listed for book preservation. Marty Mintzell ______________________________ Reply Separator _________________________________ Subject: Cleaning up classic books Author: classiccmp(a)u.washington.edu at internet Date: 3/19/98 7:42 PM Many of the old computer books I get from thrift stores have the price of the book written in grease pencil on the inside cover of the book. I'd like to remove this safely. Can someone point me to the right place to find this sort of information? Thanks. Sam Alternate e-mail: dastar(a)siconic.com ------------------------------------------------------------------------------- Computer Historian, Programmer, Musician, Philosopher, Athlete, Writer, Jackass Coming Soon...Vintage Computer Festival 2.0 See http://www.siconic.com/vcf for details! ------ Message Header Follows ------ Received: from lists2.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Mar19.194222.1767.33023; Thu, 19 Mar 1998 19:42:23 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with SMTP id QAA11739; Thu, 19 Mar 1998 16:35:56 -0800 Received: from mxu4.u.washington.edu (mxu4.u.washington.edu [140.142.33.8]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.05) with ESMTP id QAA17044 for <classiccmp(a)lists.u.washington.edu>; Thu, 19 Mar 1998 16:35:50 -0800 Received: from shell.wco.com (root(a)shell.wco.com [199.4.94.16]) by mxu4.u.washington.edu (8.8.4+UW97.07/8.8.4+UW97.09) with ESMTP id QAA08101 for <classiccmp(a)u.washington.edu>; Thu, 19 Mar 1998 16:35:49 -0800 Received: from shell (dastar@shell [199.4.94.16]) by shell.wco.com (8.8.5/8.8.5/WCO-18jul97) with SMTP id QAA28027 for <classiccmp(a)u.washington.edu>; Thu, 19 Mar 1998 16:35:46 -0800 (PST) Message-Id: <Pine.GSO.3.96.980319163413.10428C-100000@shell> Date: Thu, 19 Mar 1998 16:35:40 -0800 (PST) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Sam Ismail <dastar(a)wco.com> To: "Discussion re-collecting of classic computers" <classiccmp(a)u.washington.edu> Subject: Cleaning up classic books MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Classic Computer Discussion <classiccmp(a)u.washington.edu> X-Sender: dastar@shell X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN

28 years, 5 months

Found few chips and one interesting chip.

by allisonp＠world.std.com

<One guy had list of stuff for sale or trades recently within last <week or so and was asking for those 8228 chips. <1 x AMD 8284A <1 x Fujitsu 8284A <3 x Nec 8284AD 8284 .NEQ 8228. The 8284/A is specific to 8088/v20 and 8228 is specific to 8080. <MC857P, dated '71 of 18th week. uRTL or DTL (utilogic) , real slow and real old. Generally simple gates or maybe a dual flipflop. Allison

28 years, 5 months

information

by turloughobrien＠tinet.ie

I am a student in Trinity college Dublin,Ireland.I have been assigned a project on "videotext" but there is little to no information available on the net about "Videotext" or in the libraries.I would greatly appreciate it if you could send me some informatin on the subject. Yours sincerly Turlough O'Brien. turloughobrien(a)tinet.ie

28 years, 5 months

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