29 Apr
2013
29 Apr
'13
10:55 a.m.
If all else fails, I can take a voltmeter to my cable and make you a pinout table. Let me
know.
Kevin
Message: 3
Date: Sun, 28 Apr 2013 09:24:27 -0400
From: Rick Murphy <rick at rickmurphy.net>
To: cctalk at classiccmp.org
Subject: RRD50 Cable documentation
Message-ID: <201304281324.r3SDOTpE032247 at rickmurphy.net>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I'm in the process of trying to resurrect a MicroVAX-II system.
I have a RRD50 cd reader and the associated KRQ50 controller. What I'm
missing is the cable between the cabinet kit and the drive.
I've tried various incantations, including a AUI cable (DA15 to DA15)
and what I think is a straight-through cable. I also hooked the cabinet
kit DA15M direct to the drive with no success.
In most cases the drive spins up but when I try to boot it, the red
error LED on the drive blinks then it spins down.
So, I've got to build a cable. Does anyone have documentation of the
pinout of what I need to build?
Thanks,
-Rick
Sent from my iPad
29 Apr
29 Apr
6:54 p.m.
At 01:55 PM 4/29/2013, Kevin McQuiggin wrote:
If all else fails, I can take a voltmeter to my cable
and make you a
pinout table. Let me know.
Hopefully it won't come to that. However, a simple test might
suffice. The first twisted pair connects to pins 1 and 9 on the DA15F
cab kit connector. (The other pairs are 2/10, 3/11, 4/12, and 5/13.)
Is pin 1 on the female end of your cable connected to pin 1 on the male
end?
Is pin 9 connected to pin 9?
If you can tell me where pin 1 goes and where pin 9 goes, I can very
likely reproduce a usable cable, assuming that the DEC controller side
mirrors the signal order on the drive side.
Knowing those 5 pairs is enough to guarantee a matching cable - the
rest of the pins don't matter.
-Rick
30 Apr
30 Apr
12:52 p.m.
At 01:55 PM 4/29/2013, Kevin McQuiggin wrote:
It sounds like it could well be the Philips/LMS interface. The service
manual for a PHilips CD-ROM drive that I mentioned says that the
connecotr pinout is :
1 : Responce +
2 : Command +
3 : Data +
4 : Clock +
5 : Attention +
6 : N/C
7 : N/C
8 : Ground
9 : Response -
10 : Command -
11 : Data -
12 : Clock -
13 : Attention -
14 : N/C
15 : N/C
The cable si 'twisted in pairs, pin to pin with the exception of pins 6,
7, 14 and 15'.
Since there are actually an odd number of conenctions (due to the ground
on pin 8), that comment makes not total sense, but I think it's clear
what is meant.
Of the 5 signals, command is from controlelr to drieve, all others are
If all else fails, I can take a voltmeter to my
cable and make you a
pinout table. Let me know.
Hopefully it won't come to that. However, a simple test might
suffice. The first twisted pair connects to pins 1 and 9 on the DA15F
cab kit connector. (The other pairs are 2/10, 3/11, 4/12, and 5/13.) from drive to controller. Clock and data are extracted
fro mteh CD-ROM
data stream, command, respsone and attention end up on the drive
microcontroller.
-tony
4035
days inactive
4036
days old
2 comments
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ard＠p850ug1.demon.co.uk -
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