21 Jun
2002
21 Jun
'02
1:20 p.m.
On Fri, 21 Jun 2002, Ethan Dicks wrote:
They came from our MicroVAX-I or MicroVAX-II, c. 1986-1987, so the KA630
should be no problem. Dunno about the KA655, though. My newest Qbus CPU
is a uVAX-II (got RAM, but no CPU). I think it all fits on an RD52; an
RD53 would be plenty of room.
Why would anybody WANT to? :)
I haven't ever even hooked up my RX50. So far, TK50 & netboots have
been sufficient.
Doc
I did find a device on the Linux side of the boxin
question with something
close - it's double-sided, though. If it matters, I think it's running
an ancient Slackware distro (4.0?) 2.0.36 kernel. I only upgrade software
at gunpoint. I haven't tried anything with it yet, due to the DS nature.
I suppose I could go digging in the source and create a minor device
number that did what I want, at least in terms of geometry. The one I'm
looking at, BTW, is minor number 120 (IIRC), if that even is a portable
quantity. Major numbers aren't once you start fiddling with devices and
recompiling the kernel.
/dev/fdX800 is major 2 minor 120, 800k, 80 tracks, double-sided 10
sector, *3.5"* device. Won't fly on 5.25".
I've written 360k SS images on 720k DS disks with no problems, as long
as the drive is single-sided. I don't know that I've tried it with a HD
drive without preformatting the disk to SS first.
I have a wad of Ultrix 32m and MicroVMS diskettes...
Ooohhh.... Ultrix! Will it run on KA630 or KA655? The PUPS version
of 32M is like 11/780 or older or something. Erzatz-11 eval says you can read-write RX50 on
a HD 5.25" drive. I
expect that emulators, or at least E-11, will like those....
I guess I can go that route, too. I hadn't dug into E-11 enough to know
that I could use a real 5.25" drive with the emulator. It begs the
question, though - how well does a *real* RX50 drive work with a PeeCee,
with or without E-11? Any advantage?