31951Re: [midatlanticretro] RK05 Drive
- Aug 6, 2013On 08/06/2013 11:38 AM, tedheadster wrote:
> Dang, do I understand correctly that the RK11-D controller for an RK05 disk is FOUR Unibus boards?No, they are not Unibus boards. The are "RK11-D" boards. One of them
> M7254 RK11-D U RK05 status control module
> M7255 RK11-D U RK05 disk control module
> M7256 RK11-D U RK05 registers module (data path)
> M7257 RK11-D U RK05 bus control module
> How do you have room for anything else in the computer?
implements a Unibus interface. But be careful, as the RK11-D also requires
an RK11-D backplane. It looks like a Unibus backplane, but it isn't; it's
specifically wired to be an RK11-D.
As far as anything else, remember that during the time of RK05s, they were
"big system" drives. One would rarely have an RK05 subsystem on a machine
whose CPU is in a 3U chassis; 6U was more common for larger systems, and then
there are the even larger ones as used in the 11/45 and 11/70. And then, of
course, expansion chassis.
Dave McGuire, AK4HZ
New Kensington, PA
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