[HECnet] Anyone got spare MMJ-MMJ console cables?

[Brian Schenkenberger, VAXman-]

<Paul_Koning at Dell.com> writes: 


On Dec 21, 2012, at 1:33 PM, Brian Schenkenberger, VAXman- wrote: 

sampsa at mac.com writes:=20 >=20 >> Clem,=20 >>=20 >> Mark Benson has
already volunteered to make the cables at cost - I just >> need to know
if the console cables are wired straight across or >> crossover?=20 >=20
DECconnects are a flat 6-conductor cable.   The MMJ plugs are attached
suc= h > that the same side of the flat cable is inserted into each MMJ
plug.   Thi= s > provides an implicit signal crossover.   So, if your 6
conductor cable had > White, Black, Red, Green, Yellow, Gray conductors,
one side would show th= e > colors as I've listed them and the other
side would be Gray, Yellow, Gree= n, > Red, Black and White. 

I thought I've seen straight-through version also, which you can make by
ha= ving one of the two connectors "upside down". 

You might have seen that but it wouldn't work with the myriad MMJ to 25pin
and 9pin connectors that DEC had floating about.   I believe, if you took a
look, that this is all detailed in the OpenVMS FAQ.   Stephen Hoffman keeps
one of the most up-to-date OpenVMS FAQs (probably because he compiled most
of it while he was still in OpenVMS Eng.) on his web site.

http://labs.hoffmanlabs.com/vmsfaq/vmsfaq.html

MMJ specifics: 

http://labs.hoffmanlabs.com/vmsfaq/vmsfaq_025.html#index_x_1818
-- 
VAXman- A Bored Certified VMS Kernel Mode Hacker       VAXman(at)TMESIS(dot)ORG

Well I speak to machines with the voice of humanity.