>Ok, so on my distribution disk if I boot it up it comes up as RT-11 V20B
>SJ but if I boot DXMNTFB.SYS it comes up RT-11 V20B FB. What's the
>difference? Floating point?
SJ is the single-job monitor. One job is all you have, period.
FB is the foreground-background monitor. You have two jobs. The
foreground job is the higher-priority job. When it blocks, the
background job gets a chance to run (actually, completion routines
for the jobs are slightly higher than the jobs themselves).
So, you can run a data collection program in the foreground, and
the data reduction or storage program in the background.
If you need to direct terminal input to the foreground, you type
<Control-F> first, then type... To then have terminal input go
to the background job, type <Control-B>.
Later versions of RT-11 had foreground/background and up to 6
system jobs (with priorities in between background the foreground).
Megan Gentry
Former RT-11 Developer
+--------------------------------+-------------------------------------+
| Megan Gentry, EMT/B, PP-ASEL | Internet (work): gentry!zk3.dec.com |
| Unix Support Engineering Group | (home): mbg!world.std.com |
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Received on Sat May 01 1999 - 22:15:25 BST