That doesn't match what I learned (or what's in
RSTS 10.1). The reset
in location 0 was an old convention. But when a real boot block
standard appeared, it said that 0 had to be a NOP, and 2 a branch to
the setup code. Also, there had to be a "Szeto ID area" just before
the branch target.
Darn, you're right... I plead memory bit-rot.
The RT data disk (non-bootable, although there is a small routine
loaded into block 0 which, if you try to boot the volume, reports
that it is not bootable) contains
240
5
BR
so there is a reset on a data disk for RT.
A bootable disk, however, is
240
BR
as you mentioned...
Megan