test-drb July 2014

test-drb@ccmp.vtda.org

181 participants
190 discussions

by slandon110＠gmail.com

Just clearing out some stuff before VCF I have a Woz Edition ROM 01 IIGS complete with Monitor, Keyboard, Mouse & External 5.25 and 3.5 drive. $125 plus shipping; Works great. SupraRAM 2000 Zorro RAM Card for Amiga. Currently has 2MB on the card its expandable to 6 $50 A2091 SCSI Controller with 2MB RAM on the card. Supports up to an 8GB drive in 2GB partitions. $50 Amiga cards were pulled out of my 2000 When I updated the SCSI card & RAM card

10 years, 4 months

PDP-11 diag and repair

by j_hoppe＠t-online.de

Hi all, Since severals months I'm repairing PDP-11 PCBs. Quite a strange world, but some experiences may be of interest to others: http://www.retrocmp.com/how-tos/using-pdp-11-diagnostics http://www.retrocmp.com/articles/time-scales-of-a-pdp-11-34 Joerg

10 years, 4 months

Recycling company in Belgium

by sales＠elecplus.com

Several people mentioned that they had trouble finding recyclers in the EU, so here is another one: Osman Umut Sengul Electroplaza Scheigoorstraat 4/1 3580 Beringen / Belgium Office: +32 (0) 11 72 64 36 Fax: +32(0) 11 91 12 94 Mobile1: +32 (0) 48 93 52 591 Mobile2: +32 (0) 48 93 52 592 Cindy Croxton Electronics Plus 1613 Water Street Kerrville, TX 78028 830-792-3400 phone 830-792-3404 fax sales at elecplus.com AOL IM elcpls

10 years, 4 months

Digiac Com-Tran 10 schematics

by aek＠bitsavers.org

I'm finishing up the post-processing today for an Air Force training manual on this, and was wondering if anyone has the schematics, which are referenced in the manual but not included. I found one message from Robert Borsuk in 2007 saying he had a set, but I don't know if any of the email adrs that are around are any good any more http://www.classiccmp.org/pipermail/cctech/2007-May/040446.html "Does anyone know what a Com-tran Ten is? I have a set of prints (over 30 pages) I pulled from my filing cabinet (while looking for Mac info for Teo and Jeff) which say they are a reprint by permission of Digiac Corporation. I tried doing some goggling but to no avail."

10 years, 4 months

Determine two Ascii Characters

by jhfinedp3k＠compsys.to

I seem to remember a VERY short instruction sequence which converted a binary value between 0 and 99 Decimal (between 0 and 143 octal) into two Decimal Ascii Characters, each between "0" and "9". However, I can't remember the actual instructions. Maybe I am confusing the memory with the following three instruction sequence from Billy Y... and if so, please ignore my request. sub #'9+1 ,r0 ; convert ascii byte add #9.+1 ,r0 ; to an integer bcc 20$ ; not a number Jerome Fine

10 years, 4 months

TU56 and G888 Module

by marco＠familie-rauhut.eu

Hello list! i`am working on the restoration of my TU56 Drive. It has an overvoltage damage. The manual transportlogic control and the transportcontrol by the TD8E is working correct. Now i`am in trouble with the G888 Manchester read/write Modules. Specialy with the adjustment of the zero crossing detector. In the maintanence manual i could not find any information on the correct adjustment and originaly the poti is secured by black paint... Oszi <http://www.familie-rauhut.eu/pic/oszi.gif> The yellow graph is the output of the first Amplifier witch is amplified the read heads outputsignal. The blue signal is the output of the nand driver(7400) after the zero crossing detector. In case of the term zero crossing detector, i placed the rising edge of the output on where the sine wave cross the zero line. Any usefull hints on the adjustment of the "zero crossing" detector? Marco * Englisch - erkannt * Englisch * Deutsch * Englisch * Deutsch <javascript:void(0);>

10 years, 4 months

HP9830B and HP9866B restoration.

by mattislind＠gmail.com

I'd just like to mention that I have completed the repair of a vintage 1976 HP9830B BASIC calculator and HP9866B printer. If you are interested in the story, take a look here: http://www.datormuseum.se/computers/hewlett-packard/hp9830 I also made a short video on it when it is running: https://www.youtube.com/watch?v=WE8KJ4-UcFk /Mattis

10 years, 4 months

Tektronix VT220 compatible keyboard - information needed

by grif615＠mindspring.com

Vt220 did REGIS graphics. ?Character and special character based. ?DEC VMS days <div>-------- Original message --------</div><div>From: Richard <legalize at xmission.com> </div><div>Date:07/28/2014 10:19 AM (GMT-08:00) </div><div>To: cctalk <cctalk at classiccmp.org> </div><div>Subject: Re: Tektronix VT220 compatible keyboard - information needed </div><div> </div> In article <53D2548F.3090407 at wickensonline.co.uk>, Mark Wickens <mark at wickensonline.co.uk> writes: > I have a Tektronix VT220 compatible keyboard as pictured here: > > http://deskthority.net/resources/image/12676 > > Can anyone provide any information/links/technical specs? Check this PDF for mention of a terminal that offers a VT220 style keyboard: <http://manx.classiccmp.org/collections/legalize/tektronix/Tektronix_Termina…> Start with terminals that offer a VT220 personality: <http://terminals.classiccmp.org/wiki/index.php?title=Special%3ASearch&searc…> > I suspect it > is off either a character terminal or an X-terminal. If I can't find > anything about the protocol the plan will be to replace the controller, Protocol would be described in the service manual for an earlier terminal, but I've never seen a service manual for any of the X terminals. (Not even one for any brand of X terminal, not just the Tektronix ones! I'm sure they exist, but I haven't seen one.) -- "The Direct3D Graphics Pipeline" free book <http://tinyurl.com/d3d-pipeline> The Computer Graphics Museum <http://ComputerGraphicsMuseum.org> The Terminals Wiki <http://terminals.classiccmp.org> Legalize Adulthood! (my blog) <http://LegalizeAdulthood.wordpress.com>

10 years, 4 months

My new arrival - MTU-130

by nospam212-cctalk＠yahoo.com

I just received a new system, one I've been interested in for a long time but seen very little about. A 6502 based Micro Technology Unlimited MTU-130. Received the system, monitor, dual 8" floppy drives, a printer and piles of documentation and software all from the original owner who used it for biochemistry research. Particularly can't wait to try out the light pen which came standard with the system. Does anyone else on the list have one? Any other doc or software available? I will have to catalog everything but will scan anything that isn't already out there. The owner is still sending me some newletters and such he found after he sent the system as well as some more background on how he used the system and what he did with it. An old ad for the system for those who aren't familiar with it: http://www.trailingedge.com/related.html?key=mtuad.jpg <http://www.trailingedge.com/related.html?key=mtuad.jpg&type=ad> &type=ad Pics of the new system: http://www.trailingedge.com/images/MTU-130-1.jpg http://www.trailingedge.com/images/MTU-130-2.jpg http://www.trailingedge.com/images/MTU-130-3.jpg http://www.trailingedge.com/images/MTU-130-4.jpg http://www.trailingedge.com/images/MTU-130-5.jpg http://www.trailingedge.com/images/MTU-130-6.jpg David Williams www.trailingedge.com

10 years, 4 months

microcode store (was Re: Looking to get into a MiniComputer...)

by mark.kahrs＠gmail.com

Let me add that the PDP 11/44 was microcoded... Specifically, it was used by CMU to do C.mmp and Cm*. The microassembler was the Most Unlikely excuse for a MicroassemBLEr (MUMBLE), written by none other than some guy named James Gosling. Somehow I ended up with a listing of MUMBLE and the microcode --- I sent that to the CHM. Mark.

10 years, 4 months

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test-drb July 2014