System Debug Reference Manual (32650-90888)

140 Chapter4
System Debug Command Specifications :-Exit
ENV
When ECHO_CMDS is set, each command (other than those executed within
macros) is echoed just prior to its execution. The default value for this
variable is FALSE.
ECHO_SUBS BOOL (cmd) rw *
When ECHO_SUBS is set, and CMDLINESUBS is enabled, command line
substitutions are displayed as they are performed. In the following
example, the first line displays the location of the substitution and the
second line displays the result after the substitution has taken place. The
default value for this variable is FALSE.
subs > fv a.c0341450 "|symfile :student_record"
/\
done > fv a.c0341450 "gradtyp:student_record"
ECHO_USE BOOL (cmd) rw *
When ECHO_USE is set, each command line that is read in from a use file is
echoed (along with the name of the USE file), prior to its execution. The
USE file name is used as the prompt. The default value for this variable is
FALSE.
EIEM U32 (nmreg) r dm
NM external interrupt enable mask. (Alias for CR15)
EIRR U32 (nmreg) r dM
The NM external interrupt request register. (Alias for CR23)
ENTRY_MODE STR (misc) r
This variable contains either "NM" or "CM". For Debug, it indicates
whether you entered either in cmdebug or nmdebug. For DAT, it just
tracks the MODE variable.
ERROR S32 (cmd) rw
The ERROR variable contains the most recent error number. It is cleared on
entry to any user-defined macro. Refer to the IGNORE command, the ENV
variable AUTOIGNORE, and the "Error Handling" section in Chapter 2 for
additional error handling information. Note that only negative values
constitute errors. Positive values are warnings.
ESCAPECODE U32 (misc) rW
This is the last ESCAPECODE value that was stored for the process at the
moment Debug was entered. This variable is restored when the debugger
resumes execution of the process. Since Debug itself causes the escape
code for the process to change, it is necessary to cache the original value.
This variable is not available in DAT.
EXEC_MODE STR (misc) r
This variable contains either "NM" or "CM". It indicates the execution
mode of the current process. This value is obtained from the TCB
(operating system data structure). This value does not necessarily match