all interrupts
or
instructions are traced for
that
operand.
The codes specified in these operands are cumulative
until the respective table
is
full; an entry may not be
deleted from the table, but the table's contents can be
cleared by re-specifying the operand without the nn
option.
2.
To
resume operation
of
the virtual machine after
instruction execution has been halted with the
NORUN
option, the BEGIN command must be entered.
3. The
TRACE
command can be used as an address stop
function by using the
NORUN
option.
4. Stores to a location which do not cause the storage to
change will not be detected
by
storage alteration trace.
5. Storage alteration trace
is
limited to any four (4)
consecutive bytes of storage.
6.
If
trace output
is
being recorded
on
the printer, a
CLOSE command must be entered to create the spool
file.
7.
When recording trace output on the printer, the trace
output
is
intermixed with other data sent to the printer.
Responses: The following symbols are used in the responses
received from TRACE:
mnem
iii iii
i i
bm
cc
code
mnemonic for the instruction
instruction (2, 4,
or
6 bytes)
branch mask
condition code
interrupt code
TRACE
ACTIVATED
tracing function activated
TRACE
TERMINATED
tracing function terminated
7-54
VM/PC
Users Guide
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