Previous message: Wire list for the RKV11-D Qbus RK05 controller backplane anywhere?

Ethan Dicks ethan.dicks at
Wed Feb 12 11:37:02 CST 2020

On Wed, Feb 12, 2020 at 12:28 PM Noel Chiappa via cctalk
<cctalk at> wrote:
> My fiche set has the Technical Manual, and also (in the wirelist
> section) the wirelist.
>     > That fourth card (M7268) is apparently a connector card for the Q-Bus
>     > and drive bus.
> Yes, but actually there are 6 cards: the M7269 is a dual card which goes
> into the QBUS backplane, and the M993-YA which goes into the first RK05,
> to convert from the two flat cables which come from the M7268.


>     > From: Al Kossow
>     > Also, it is only 18 bits.
> Actually, only 16-bit DMA addresses, I'm pretty sure.

It is.


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