From: Cory Smelosky
Sent: Wednesday, April 15, 2015 11:31 AM
On Wed, 15 Apr 2015, Rich Alderson wrote:
> Use the Tops-10 Monitor Calls Reference Manual
vol. 2 from Bitsavers, to see
> the layout of a DEC HOM block (in the tables portion of the manual). Vol. 1
> has a good discussion of going from [1,1] to a file in a directory, and the
> HOM block contains a pointer to [1,1].
Hmmm. [1,1] is the ...what's the term... UFD? that
I can access files
from.
MFD (Master File Directory). It's not quite the same internally as a User
File Directory. Also found in the tables, come to think of it.
I figured out what that was, it's an issue with
the file being larger than
an actual rp06 disk image (truncating it, setting it to an rm05,
Umm, isn't an RM05 300MB vs. 200MB for an RP06 (real unformatted capacities)?
> If you like, we can move the discussion to the
SimH list (to include Tim
> Litt) or alt.sys.pdp10 (to include lots of other folks).
That would get a bit offtopic for SIMH as I'm
using KLH10 for this (I've
only gotten the image to be happy with fmt=dbd9, unsure if SIMH can do the
same conversion but I will try shortly)
SimH only knows one disk format, the one that KLH10 calls "dlw8" (little-
endian, 1 word in 8 bytes).
No responses on alt.sys.pdp10, perhaps you can wake
some people up? ;)
I'll rattle the cage.
Oh, a heads up: the SC-40s you have can all run the
newer supervisor (1.08
instead of 1.01. I found mine passed all diags after I imaged the newer
drive...aside from the SC-40 Exerciser of course, that's still unhappy
with my SCSI bus.)
OK, thanks!
Rich
Rich Alderson
Vintage Computing Sr. Systems Engineer
Living Computer Museum
2245 1st Avenue S
Seattle, WA 98134
mailto:RichA at
LivingComputerMuseum.org
http://www.LivingComputerMuseum.org/