DEC RK07 drive interface specs wanted

From: Tony Duell <>
Date: Wed May 12 18:04:57 2004

> Hi.
> All this talk about frontpanel emulators...
> So I have this (mostly) working PDP-11/34, my one and only UniBus
> machine. It came with a RK07 drive. But the system was stored under bad
> conditions for years. There is rust and corrosion _everywhere_. The

Yeas ago I bought an RK07 which had been flooded by a burst pipe. It was
cheap, and I figured that at least the plastic parts would still be
useable. When I took it off the stand, water poured out of the hollow
baseplate (this is part of the air duct on the RK07,

Anyway, I cleaned it all up, cleaned the heads, cleaned the connectors,
lubricated the fan etc. And then tried it out. Worked fine!

> machine works so far but the drive is quite rotten. I have no other
> UniBus disk drive interfaces so I need either a new RK07 (unlikely) or
> a replacement for the entire conroler / drive combination or:
> What about a RK07 drive emulating hardware?

Wouldn't it be simpler to make a Unibus card with the flash memory and
interface on it that pretended to be a disk controller? The Unibus is
fairly well documented and quite simple.


> Problem: Exact and detaild specs of the RK611 <=3D> RK0[67] interface.
> I found some hints in the "RK06/RK07 Disk Drive User's Manual" but not
> enough to build a new drive from scratch. Any pointers?=20

Do you have the printsets for the drive and controller? I managed to work
out quite a bit of the interface from those.


> --=20
> tsch=FC=DF,
> Jochen
> Homepage:
Received on Wed May 12 2004 - 18:04:57 BST

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