test-drb March 2003

test-drb@ccmp.vtda.org

314 participants
633 discussions

by dwightk.elvey＠amd.com

>From: "Patrick Rigney" <patrick(a)evocative.com> > >> The hardware solution is to disconnect the internal serial cable from the >> termianl logic PCB (the rearmost vertical PCB in the machine) and replace >> it with one of the cables that goes to a DB25 connector on the back >> (these cables are normally connected to the serial port PCB plugged into >> the computer mainboard, just in front of the terminal logic PCB). The >> cables have a Molex 0.1" pitch SIL connector on the end, and fortunately, >> the pinout of all the internal serial connectors (terminal logic PCB, >> computer 'console port', serial port PCB) is the same. > >Ouch... > >> The software solution is to write a little program that transfers >> characters between the computer's console port and one of the other >> serial ports. This will then make the computer section appear as a >> transparent link between the terminal and the outside world. > >much easier than any of the above... get a copy of MDM712 or similar >terminal emulation program. MDM712 comes with a serial port driver for >H8/89. Plug your device into the spare serial port on the back of the >(unopened) machine, and that should do it. Some '89's have three-port >serial cards... I don't know which ends up being which or whether MDM712 >lets you choose, all of my '89's are down right now. :-/ > >Patrick > Hi Why would you assume that finding and installing some software would be easier than making up a simple molex adapter connector. As I recall, it was a 9 pin molex but I could be wrong. That is all of 9 wires to deal with. Dwight

21 years, 8 months

DEC drives

by t.ellis＠talk21.com

If anyone is interested I have just broken down a VAX and pulled all the boards out and the 2 digital RF35/RZ35 HDD

21 years, 9 months

AXP 7000 startup, now doing OSF/1

by gunther＠aurora.regenstrief.org

Hi, I have installed OSF/1 on the AXP 7000 and it's working. Quite a bit more snappy than the VAX6460. Man, I have no room for this machine left and now I love it so much! I'd give you login account (over my dialup IP) just the problem I am having is that after I built the custom kernel it still won't let any user other than root login. It says "too many users logged in alread, try again later". And that with zero users logged in at the time. Can you think of any file I might be overlooking? I can only think of /etc/nologin or something. My maxusers is at 32 in the kernel configuration. I can't think why this would not be correct in the kernel. regards, -Gunther

21 years, 9 months

Looking for....RL02 controller for PDP-8E M8433?

by pete＠dunnington.u-net.com

On Mar 28, 9:47, Jay West wrote: > I've heard these really aren't to be found anywhere, but thought I'd check > with the list. > > I'd like to get a disk subsystem on my PDP-8E. I've pretty much given up > that I'll ever find an RK05 drive and controller for it, so I'm now looking > to hook up an existing RL02 drive to it. I think this is done via the M8433? If you have an 8/E, I'm afraid an M8433 won't be any use to you, because it's an RL8A, which is a hex board, not a quad one. It's meant for a PDP-8/A. -- Pete Peter Turnbull Network Manager University of York

21 years, 9 months

Epson HX-20

by finncr＠msn.com

I would like to buy a EPSON HX-40. Who can help. I also need a printer cable. Charlie

21 years, 9 months

hp-85A & 128K mem module question

by vp＠mcs.drexel.edu

Innfogra(a)aol.com wrote: > Does anyone know what command or process you would use on a HP-85A to verify > that the 128K Memory Module that plugs into the back of The HP is working. The Instruction sheet for the HP 82907A (32K), HP 82908A (64K) and HP 82909A (128K) Menory Modules states: "The HP 82907A, HP 82908A, and the HP 82909A Memory Modules cannot be used with the HP-83 and HP-85 Personal Computers." The note obviously refers to the HP-85A, since the HP-85B *can* utilize these modules as RAMDISCs. So you need either an HP-85B, an HP-86, or an HP-87 to use your 128Kb module. > I seem to remember that the 85A needs a ROM to use a 128K Memory Module. You may be thinking of the 00087-15012 Electronic Disk (EDISC) ROM which allows memory to be used as RAMDISC. This ROM is built into the HP-85B while it is optional for the HP-86/87. Sorry. **vp

21 years, 9 months

25F8398

by dion＠technologyexpress.com.au

It comes from an IBM 3174 Controller. Regards, Dion Nowoweiski c/- Technology Express 39-45 Johnston Street Port Melbourne VIC 3207 Ph: (03) 9646-9933 Fax: (03) 9646-9922 Mob: 0412-450-950 ********************************************************************** This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you have received this email in error please notify the system manager. **********************************************************************

21 years, 9 months

Help sought on early IBM hard drive R&D

by menadeau＠attbi.com

Can anyone answer her question? She is particularly interested in the years 1957-1962 when Building 014 was being built and then opened. ----- Original Message ----- From: <bbamburg(a)pacbell.net> To: <letter(a)classictechpub.com> Sent: Saturday, March 29, 2003 5:29 PM Subject: Question > I found the Classic Tech Publication website with many interesting > articles. I am preparing a historical and architectural evaluation of > the Advanced Research Building 025 on the IBM Cottle Road Campus as > part of an EIR for the site. The majority of the campus was included in > the sale of the IBM Hard Disk Drive Unit to Hitachi, however this > building was excluded. It is proposed for demolition and the site to be > redeveloped. The building has architectural significance as one of the > finest examples of the Modern Industrial style (1940-1985) in San Jose. > The question that has not been adequately answered is what research or > prototype occurred in this building. It is suggested that the flying > head research was done in this building. The building was designed for > Reynold Johnson's design team which moved from 99 Almaden in San Jose. > Can you direct me to information that would identify the research > conducted in this building? > Thank you for any assistance you can provide. > Bonnie Bamburg > Michael Nadeau Editor/Publisher Classic Tech, the Vintage Computing Resource www.classictechpub.com

21 years, 9 months

8/L repairs

by charlesmorris＠direcway.com

On Fri, 28 Mar 2003 12:58:47 -0600, you wrote: >A) What rev M706 card do you have? Rev. K. That's one reason it took me a while to find, since the only schematics available seem to be the first revision (A?) >B) Would you write up where you attached your pullups? Check the schematic, it was on the preset lines to the 7474 containing stop bit 1 and stop bit 2... >Are you using a microprocessor on your DF32x4? FPGAs? PALs? TTL? Plain old 74LS and a Dallas Semi DS1258 128kx16 NVRAM. >How are you handling the cabling issue? Cables :) (I also laid out a PCB to plug in the backplane and accept a standard 40 pin IDC header connector). Had five fabricated and made 3 foot ribbon cables. > Do you have a way to load >the emulated disk devices "out of band"? (i.e., can you get data into >it in any way other than the databreak interface to the -8?) No, I took the DF32 manual and copied the specs as closely as possible. The 8/L should "think" it has a real DF32 and three expansion DS32's attached. > >> [demime 1.01a removed an attachment of type image/jpeg which had a name >> of mvc-457e.jpg] > >What's the picture of? > >-ethan Pic is of the DF32x4 on the workbench. I'll send you a copy direct. -Charles

21 years, 9 months

Hacking an RS-170 tap into a B&W TV set?

by erd_6502＠yahoo.com

Tony (and others ;-), How does one go about looking for the right place to install an NTSC video input jack into a B&W TV without schematics? I have the "Cheap Video Cookbook" which describes the technique, but I'm trying to do this to a $20 K-Mart 4" B&W TV set (Spectra Model 52-BWR). Among other appeals, it's battery/auto/AC powered and should work great with, say, an 1802 with an 1861 (Elf, VIP, et al). Good portable demo set for low-res graphics. If it helps, the largest IC appears to be marked as follows... CD5151CP EP3 II DE028 Thanks. -ethan

21 years, 9 months

← Newer
1
2
3
4
5
6
7
...
64
Older →

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

1997

test-drb March 2003