PDP-11/73 booting!

[Allison]

>
>Subject: Re: PDP-11/73 booting!
>   From: David Betz <dbetz at xlisper.mv.com>
>   Date: Wed, 30 Nov 2005 20:38:59 -0500
>     To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
>
>Well, I have the two cables that connect to the RDxx drive. Sounds  
>like my best bet would be to get a BA23 box with the appropriate  
>panel already installed. I guess I'll start looking for one of those.

Certainly if you can find a BA23 with the rack kit that would be an ideal 
solution just make sure it has the PDP-11 backplane (can have a different
one for VAX).  Then you can transfer the modules you have to it and have
more usable slots as the backplane is 18 slots (ABAB config).  There's
a plus you'll have the distribution board for the in box mounted RX 
and RD drives.

Allison

>
>On Nov 30, 2005, at 7:18 PM, Allison wrote:
>
>> There isn't a "cab kit" for RQDXn.  The cables were all internal
>> and you used RQDXn in one of the BA23/123 boxen.  So you either need
>> a M9058 from a scrapped BA123 or a mostly torn up BA23 (micro PDP11
>> or microvax) you can pull the pannel from. You also need the little
>> switch pannel inserts from the BA123 to enable READY/OFFLINE and
>> Writeprotect.
>>
>> You need:
>>
>> 1 50 pin female to female IDC cable (max length 18") RQDXn to breakout
>> 1 34pin female to female IDC cable (max length 30") (RX50)
>> 1 26pin IDC to card edge (RDxx)
>> 1 34 pin IDC to card edge (RDxx)
>>
>> If your not using either of those boxes then your doing what I did
>> which was to build something DEC didn't document.  The cables are
>> seriously are trivial and not a big a deal like those breakout boards
>> and the switch pannels.
>>
>> Having done this I know.