Introduction and need help bringing some pdp11's back
Douglas Taylor
dj.taylor4 at comcast.net
Wed Oct 30 10:29:29 CDT 2019
On 10/29/2019 10:14 PM, Chris Zach via cctalk wrote:
> Ok, first hurdle is down. In reading the RQDX3 Controller Module Users
> Guide it shows that for a BA23 the 50 pin cable goes down under the Q
> bus chassis then loops straight up into the RQDX3. Which is impossible
> to do with a modern (hee hee!) 50 pin SCSI ribbon cable as the cable
> keys are set up so that it would not be possible to plug the cable
> into the RQDX3 without inverting it (Because DEC likes to sell their
> cables with upside-down keys). However 30 seconds with a flush cutting
> pliers allowed me to remove the cam/key from the cable connector and
> plug it into the RQDX3.
>
> System is now booting up off the floppy. Good step forward. I'll shut
> it down for now, and get a XXDP+ floppy from Ebay. That should allow
> me to format a Maxtor RD54 drive and get this thing up to steam.
>
> Bit of progress. Thanks all! :-)
>
> CZ
I created an XXDP floppy for the RX33 drive in my BA23 based PDP-11/23
using simh and then copying the image to real floppy using Putr. It
seemed brute force. Is there an easier way?
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