5.78 TRACEOPT (Instruction trace display option)

5.78.1 Function

TRACEOPT sets the Hercules instruction tracing display option. In addition to the TRACEOPT system
parameter there is also a corresponding TRACEOPT console command to dynamically display and/or
update the current setting at any time.

5.78.2 Syntax

Descriptive

Diagram

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5.78.3 Parameter

TRADITIONAL

TRADITIONAL (the default), displays the registers following the instruction about to
be executed such that pressing enter (to execute the displayed instruction) then
shows the next instruction to be executed followed by the updated registers display.

REGSFIRST

REGSFIRST displays the current register contents followed by the instruction about
to be executed such that pressing enter (to execute the displayed instruction) then
shows the updated registers followed by the next instruction to be executed.

NOREGS

NOREGS suppresses the registers display altogether and shows just the
instruction to be executed.

5.78.4 Examples

Example 1:

Set the tracing display option to display the registers following the instruction about to be executed.

TRACEOPT TRADITIONAL

5.79 TZOFFSET (TOD c
lock offset from GMT)

5.79.1 Function

TZOFFSET is used to define the offset of the TOD clock from the current system time. For GMT use the
default value (0000). For time zones west of Greenwich specify a negative value (example: -0500 for US
Eastern Standard Time, -0800 for US Pacific Standard Time). For time zones east of Greenwich, specify
a positive value (example: +0100 for Central European Time, +0930 for South Australian Time).

5.79.2 Syntax

Descriptive

+hhmm -hhmm

Diagram

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+hhmm ¬¬¬«




-hhmm

5.79.3 Parameter

0000

GMT time (0000 is the default value). Please note that this is also the correct set-
ting if your system time (the time of the operating system on which Hercules is run-
ning) is set to local time rather than GMT.

hhmm

Use a positive time in hours and minutes for time zones east of Greenwich.

hhmm

Use a negative time in hours and minutes for time zones west of Greenwich.

5.79.4 Examples

Example 1:

Set the offset of the TOD clock from the current system time to Central European Time.

TZOFFSET +0100

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