Subject: Re: RL01 support in NetBSD?
To: Greg Ingram <email@example.com>
From: Johnny Billquist <bqt@Update.UU.SE>
Date: 02/18/2000 18:18:36
On Thu, 17 Feb 2000, Greg Ingram wrote:
> Okay, I'll spill the rest of the story. Just don't yell at me. :)
Why should we? :-)
> I'm trying to resurrect a PDP11. It's Qbus. My VAX is Qbus. I'm lead to
> believe that _some_ boards will work in either system. My RX02 drives on
> the PDP11 appear to be dead so my only mass storage is an RL01.
Most any board will work in both systems. The RXV11 is probably one of a
few that don't (well, actually it does, as long as you can live with
18-bit address DMA).
> If the VAX could write to the RL01, I think I could build a a workable
> filesystem for the PDP11.
> The RL01 looks homebrew. The interface card is non-DEC; it's from Sigma
> Information Systems. It connects to a XEBEC winchester disk controller
> with a long 50-pin ribbon cable. The i/f card has a couple of interesting
> large chips from AMD (AM2901APC). I've got docs for the XEBEC controller
> and the Rodime drive, but, naturally, not for the Sigma controller.
> But it _acts_ like an RL01. I can bootstrap it:
> START? DL0
> RT-11FB (S) V05.01
> ?KMON-U-Overlay read error
> As you can see, though, there's a little problem with the OS. And I'd
> rather run Unix anyway.
Looks like it's compatible with the DEC controller alright. That makes it
a lot easier. :-)
> ps: Did I mention that I'd also then like r/w support for the RT-11
> filesystem for NetBSD? Ouch! Stop that.
Sigh! Someone should kidnap arff from 4.3BSD. Anyone think we could get
arff released from the encumbered code?
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: firstname.lastname@example.org || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol