Rob writes:
I've downloaded several ks10 instruction set
diagnostics in .SAV file format from
trailing-edge.com.
In a 36-bit world, I think I understand the .SAV file
format. I can't figure out the format that I've retrieved.
I've even tried loading the .SAV files that
I've retrieved into SIMH but SIMH complains about a "Format Error".
Any clues? Did I mung the files copying them from
the website?
I endeavored a little bit in the late 90's to get a modern FTP server that could move
36 bit executables intact. E.g. True 36-bit "BINARY" as per RFC 959, with the
.SAV's arranged nibble-wise to work.
Failing at that, I even endeavored to get a RFC for 36-bit file movement via HTTP. Tried
to drop hints to Marc Crispin (author of many RFC's).
But in the end I punted. What you want to do to get an intact .SAV, is grab the tape image
and unpack the tape image on a PDP-10 (or emulated -10). The tape image is the primal
object that will not get mangled.
Tim.