15 Feb
2004
15 Feb
'04
11:12 a.m.
That describes the procedure for switching between SJ
and FB monitors,
which clearly shows that the key issue is that the monitor you want to
boot is always MONITR.SYS.
Very good... I had sent that in private mail to jerome... The point
is that at that time, the monitor/device driver separation had not
yet occurred (didn't happen until V3B or V4) and so the boot code
specifically looked for the file MONITR.SYS on the boot volume.
I believe that one other requirement from the time is that it had
to be in the first directory segment... I seem to remember the
boot code at one point had a problem with scanning past the first
segment. I don't remember if that was a design problem from early
in RT history or a temporary, introduced bug.
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | email: mbg at world.std.com |
| Member of Technical Staff | megan at savaje.com |
| SavaJe Technologies, Inc. | (s/ at /@/) |
| 100 Apollo Drive | URL: http://world.std.com/~mbg/ |
| Chelmsford, MA 01824 | "pdp-11 programmer - some assembler |
| (978) 256 6521 (DEC '77-'98) | required." - mbg KB1FCA |
+--------------------------------+-------------------------------------+