[Bob Smith]

sorry if you have already thought of this and I might be wrong, is the
278 cable the same as the vt78 RX cable?
I recall the external drive cable was a 37 pin male and a 25 pin male
but not all the pins were used in either one.
IIRC it was the same connector as used for the DP78 and LPT (DP78 was
used instead of LPT, as it was a parallel IO path used by the VT78)
Don't know if this helps....My memory is rusty, I did not work on the
DecMate series.
bob

On Wed, Feb 19, 2020 at 8:21 AM Bill Degnan via cctech
<cctech at classiccmp.org> wrote:
>
> Thanks chris...its a 37 pin on the vt278 end.
>
> On Wed, Feb 19, 2020, 7:10 AM Chris Zach via cctech <cctech at classiccmp.org>
> wrote:
>
> > Hm. I have the bulkhead 25 pin to 40 pin interface thing from an RX02 in
> > a box, I'm not using it as I am going from the pdp11's RX01 straight to
> > the drive's controller. That should give you the pinout, want to borrow it?
> >
> > C
> >
> > On 2/18/2020 10:02 PM, Bill Degnan via cctech wrote:
> > > Looking for a DECMATE (VT-278 model) RX278 Floppy Drive Interface
> > Connector
> > > cable, part number is RC26N-2L  It's a 37 male-25 pin male cable.
> > >
> > > Here is photo I took of one (not mine)
> > >
> > https://www.vintagecomputer.net/digital/DECmate/DECMATE_VT278_PortsDriveCable.jpg
> > >
> > > I have the pinouts for the 37-pin end but not the 25-pin end.   If no one
> > > has a cable I can do a continuity test of the cable next time I have
> > access
> > > one, but it's not easily available.
> > >
> > > I am located near Philadelphia.
> > >
> > > Thanks
> > >
> > > Bill
> > >
> >