DEC RK07 drive interface specs wanted

From: Jochen Kunz <>
Date: Thu May 13 02:59:39 2004

On Wed, 12 May 2004 23:30:49 +0100
Frank Arnold <> wrote:

> A solid state disc would be a great solution, however, wouldn't it be
> a better (more general) aproach to work right off the unibus? That
> would help anyone that -like me- has a unibus-cpu with nothing else
> attached to it.
Sure. But who will fab the big, odd-shaped UniBus boards? Do you have
enough UniBus transceiver chips in stock?

> If you have (?) the scematics of the RK611, how much work would it be
> to put this into a fpga-design and add connect this to a (better four)
> CF-card socket(s) Then a cheap 32mb CF card would become a RK07+
> media...
Hmmm. Replicating the RK611 in an FPGA is an interresting idea. - If you
can get complete shematics and there are no funky things like an AMD bit
slice CPU in it.

> If you follow the RK611-design, there is no bothering about driver
> issues,
There isn't one if I use the original RK611 controler. That is an other
issue: If you emulate the entire controler, you have to make the
emulation good enough for all operating systems. It may work for a
RK611, but what about a UDA50 with its AMD bit slice CPU or a controler
that has a T11 with some non-trivial firmware on it. You can't stick
this in a (cheap, small) FPGA.

> A project like this would be a perfect entry for the VCFE of next
> year, isn't it? (Hurry up, only 50 weeks left! :-)) )
Yes, that is where the idea for this project was born. :-)
Received on Thu May 13 2004 - 02:59:39 BST

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