29 Oct
2015
29 Oct
'15
11:26 a.m.
On 2015-10-29 18:45, Ethan Dicks wrote:
On Thu, Oct 29, 2015 at 1:37 PM, Ben Sinclair <ben
at bensinclair.com> wrote:
When you had machines with an RL-drive "internal", you normally did not
use a cab kit. That was for external drives. The same is true for all
other DEC drives I know as well. I've certainly seen direct cabling
internally for SDI drives as well as external cabling for RX50 and TK50.
But the only machine I know have an "internal" RL drive is the VAX-86x0,
but maybe there were others as well...
And no, the VAX do not have a cab kit for the RL drive. Direct cable
I only have one RL02, so I think that cable
should work. I ordered it anyway!
That cable (BC80M) will work even if you get a second drive. No
matter how the first drive is attached to the controller, to add a
drive, you remove the terminator from the first drive, add a
drive-to-drive cable between the two drives, then move the terminator
to the second drive.
Can anyone with experience from back in the day comment on why there
is a BC80M? Why all the controllers didn't just use the flat cable to
a cab kit and a drive-to-drive cable? Cost? Length? EMI reduction
from running the BC80M into a BA23, etc, and only pushing shielded
cable outside the CPU enclosure? Is the flat-cable-and-cab-kit
pre-FCC only? from the RLV21 to the RL02.
Johnny
--
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|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
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