5 May
1999
5 May
'99
9:44 p.m.
Yep, you got it! [Q/CD all across]
Cool, also the wide spacing to allow the metal covers fooled me for a
minute, there is only 11 slots in these puppies. Now for the really STUPID question, Q/CD means that
all slots are
full height, like the first 3 or 4 on a BA123.
Again, on the nose!
Tim.
6 May
6 May
6:20 a.m.
A non-text attachment was scrubbed...
Name: not available
Type: text
Size: 686 bytes
Desc: not available
Url :
http://www.classiccmp.org/pipermail/cctalk/attachments/19990506/64a1195a/at…
7:26 a.m.
New subject: Console and Re: More info RE: KA650 & uVAX
At 08:20 AM 5/6/99 -0700, Zane H. Healy wrote:
Great, one time I'd prefer to be wrong..... That
will really cut down the
usefulness of that chassis :^(
Think of it as a sideways BA11-N with a few more slots :-)
Tim, et al.
You quoted the FAQ (which I also read) as needing to connect "ground" to
pin 7 but on the MMJ connector there is no "ground" pin. Just the two
differential drive TD and RD pairs. This is the question I had, how to
handle the ground situation.Do I :
1) Connect TD- and RD- together and then make those ground?
2) Use one of TD- or RD- ?
3) None of the above, do something else?
--Chuck
7:27 a.m.
New subject: Console and Re: More info RE: KA650 & uVAX
You quoted the FAQ (which I also read) as needing to
connect "ground" to
pin 7 but on the MMJ connector there is no "ground" pin. Just the two
differential drive TD and RD pairs. This is the question I had, how to
handle the ground situation.Do I :
1) Connect TD- and RD- together and then make those ground?
2) Use one of TD- or RD- ?
3) None of the above, do something else?
--Chuck
?????! Check again, your using RS422 differential not 423.
Allison
9:11 a.m.
New subject: Console and Re: More info RE: KA650 & uVAX
At 12:27 PM 5/6/99 -0400, allisonp(a)world.std.com wrote:
?????! Check again, your using RS422 differential not
423.
Allison
Sorry, I've become lost. There are many numbers, some of which relate to
signal levels and some of which relate to connector formats.
Turns out I wasn't reading the FAQ closely enough, the answer is that RD-
and TX- both connect to ground (pin 7)
--Chuck
10:11 a.m.
New subject: Console and Re: More info RE: KA650 & uVAX
Chuck wrote:
> You quoted the FAQ (which I also read) as needing
to connect "ground" to
> pin 7 but on the MMJ connector there is no "ground" pin. Just the two
> differential drive TD and RD pairs. This is the question I had, how to
> handle the ground situation.Do I :
> 1) Connect TD- and RD- together and then make those ground?
> 2) Use one of TD- or RD- ?
> 3) None of the above, do something else?
Allison wrote:
?????! Check again, your using RS422 differential not
423.
I don't know anything about DEC MMJ wiring. But various systems use drivers
and receivers that are compatible with both EIA-422 and 423. IIRC, to use
422 drivers for 423, you use the TX- output, and to use 422 receivers
for 423, you ground RX+ and use the RX- input.
9187
days inactive
9187
days old
5 comments
5 participants
participants (5)
-
allisonp＠world.std.com -
CLASSICCMP＠trailing-edge.com -
cmcmanis＠mcmanis.com -
eric＠brouhaha.com -
healyzh＠aracnet.com