4 Mar
2003
4 Mar
'03
4:33 p.m.
It does look like ODS-2 and RT-11 FS cannot co-exist,
however,
since they both want to use the 64 blocks at the start of
the image, unless it's possible that the unnecessary fields in
each of those two formats can be persuaded to step out
of each others way. Do you have any details about exactly
what RT-11 requires in that area? Maybe a disk that boots
on PDP-11, VAX (VMS), Alpha (VMS) and PC is possible
after all :-)
RT absolutely needs block 1, the Home Block. If you want the
disk bootable, then 2-5 are absolutely required. Typically,
blocks 6 through 6+(2*31)-1 are required for the directory,
but the home block contains a value where the directory is
supposed to start... but I don't believe that RT actually
uses this field, and many utilities certainly don't, assuming
the directory starts in block 6 (not to mention user programs).
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| | |
| "this space | (s/ at /@/) |
| unavoidably left blank" | URL: http://world.std.com/~mbg/ |
| | "pdp-11 programmer - some assembler |
| (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+