TOPS-10 Monitor Calls Manual Volume 2 AA-K039D ... - Trailing-Edge

CTX. [CALLI 215]
3 .CTNAM
4 .CTRNO
5 .CTRNB
6 .CTTMN
7 . CTTMB
Used to hold a context name when creating a new
context. When manipulating contexts, this word
may contain a context name or context number.
(RUN UUO word) This holds the
normally go into the left
accumulator (0 for terminal
indirect command file input).
offset that would
half of the RUN UUO
input, or 1 for
Holds the 3D-bit block address that would
ordinarily go into the right half of the RUN UUO
accuI'(l.ulator.
Contains the TMPCOR length in the left half (Bits
0-17), and its SIXBIT name in the right half (Bits
18-35) .
Contains the 3D-bit TMPCOR buffer address .
Valid function codes you can specify for .CTFNC and their argument
lists are described in the following. sections.
22.18.1 FUNCTION 0 (.CTSVH)
Saves the current context and halts the job. This has the effect of a
PUSH command (refer to the TOPS-I0 Operating System Commands Manual) .
The context created is inferior. The inferior context is deleted as
soon as you switch from it back to the superior one.
22.18.2 FUNCTION 1 (.CRSVR)
Saves the current context,
This is the equivalent
level.
and runs a program in an inferior context.
of an auto-save, then a restore, at monitor
22.18.3 FUNCTION 2 (.CVSVT)
Creates a parallel context by saving the current one and creating a
new top level context. The new context is different from one formed
by a PUSH chain, as it is not inferior, nor is· it associated with a
chain of PUSHed contexts.
22.18.4 FUNCTION 3 (.CTSVS)
Saves the current context, and switches to another (already existing)
parallel context.
For instance, you could use .CTSVR to create a new context running a
program, and switch back to the previous context using .CTSVS. You
could later return to the context created by .CTSVR (using the .CTSVS
function), and restart the program in that context, without waiting
for it to re-initialize.
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