BA23 w/RA70

From: Daniel T. Burrows <dburrows_at_netpath.net>
Date: Thu Oct 19 20:13:35 2000

Yes
Dan
-----Original Message-----
From: Gene Buckle <geneb_at_deltasoft.com>
To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
Date: Thursday, October 19, 2000 2:33 PM
Subject: Re: BA23 w/RA70


>Then the PDP-11/73 I've got is 22 bit? (I *think* it's a 73)
>
>g.
>
>
>On Thu, 19 Oct 2000, Daniel T. Burrows wrote:
>
>> The BA123 is 22 bit. I use one for a test bed and always keep a spare as
I
>> run it with the covers off and have fried a few power supplies over the
>> years. The fans just don't do the job with all the covers off.:(. The
>> BA123 is much nicer on the hands to swap boards than a BA23.
>> Dan
>> -----Original Message-----
>> From: Gene Buckle <geneb_at_deltasoft.com>
>> To: classiccmp_at_classiccmp.org <classiccmp_at_classiccmp.org>
>> Date: Thursday, October 19, 2000 11:03 AM
>> Subject: Re: BA23 w/RA70
>>
>>
>> > >Be very careful with that chassis! If it was really a MicroPDP, it
will
>> > >have an 18 bit qbus backplane in it. It will _destroy_ 22 bit qbus
>> boards
>> > >since there are power pins on the 18 bit bus that mate to data pins on
>> the
>> > >22 bit bus.
>> > >
>> > >Then again, my memory may be completely broken and I've got it all
wrong.
>> > :)
>> > >
>> > >g.
>> >
>> > I think you are remembering the BA11S and others. All the BA23's I
have
>> had
>> > and seen have all had 22 bit backplanes. ( I have at least 15 BA23's
at
>> the
>> > moment.)
>>
>> I think I was thinking of the BA123 I've got that IS a uPDP-11. (full of
>> boards too *sigh*)
>>
>> g.
>>
>>
>>
Received on Thu Oct 19 2000 - 20:13:35 BST