GE Energy Services
68K System Monitor
User's Guide
SWM0023 1.00 2 General
1-6 Full Release
68K Monitor Display
Output from the
68K Monitor
The 68K Monitor’s output is a stream of ASCII characters written back to the
‘connected’ application / subsystem. The command executed determines the exact
contents of the output.
When encountering a system exception error, or a defined breakpoint, exception and
breakpoint handling routines will generate additional output.
Display Output While most output to the monitor port is a direct result of command input, some
occurs asynchronously of the command input.
This requires the use of two methods of output display.
• The first method uses the monitor-input process, which formats the output into
a common buffer and signals the output process that data is available.
− All output that occurs synchronously with the input uses this method,
including command data and input line display.
• The second method uses exception-handling routines to display data that may
or may not occur as the result of a monitor command, but cannot be expected to
occur synchronously with the input.
− A pSOS exchange sends this data (including unassigned exception and
breakpoint data displays) to the output process.
An Example: Once a breakpoint is set, the monitor cannot control when or if the system encounters
the breakpoint.
The exception and breakpoint display output may occur at any time, and this output
has priority over monitor input process output. This may cause occasional
interruption of a command or input in progress, or the lack of a prompt re-appearing
after displaying the data, but does not affect these functions in any way