System Debug Reference Manual (32650-90888)

Chapter 6 233
System Debug Command Specifications M-X
MR
I External, power failure, & low-priority machine check
interruption enable
System Debug displays this register in two formats:
IPSW=$6ff0b=jthlnxbCVmrQpDI
The first value is a full 32-bit integer representation of the register. The second format
shows the value of the special named bits. An uppercase letter means that the bit is on
while a lowercase letter indicates that the bit is off.
Examples
%nmdebug > dr psw
PSW=0006ff0f=jthlnxbCVmrQPDI
%nmdebug > mpsw p
%nmdebug > dr psw
PSW=0006ff0b=jthlnxbCVmrQpDI
Turn OFF the protection ID validation enable bit in the IPSW.
$nmdat > mpsw CD
$nmdat >
Enable code and data translation. System Debug windows are affected by these two bits.
Limitations, Restrictions
Nmdebug alters the "R" bit while single stepping and the "T" bit when the TRAP BRANCH
command is used.
The system dispatcher enforces fixed settings for several key bits. For example, if the "I"
bit is turned off with this command, the dispatcher sets it back on when this process is
launched.
MR
Modifies the contents of the specified CM or NM register.
Syntax
MR cm_register [ newvalue ]
MR
nm_register [ newvalue ]
By default, the current register value is displayed. The ENV variable QUIET_MODIFY can be
used to suppress the display of the current value.
Parameters
cm_register The CM register whose contents are to be modified. This can be: