MSR(Model-Specific Register) Additional, indirectly-accessible, registers containing control or status information about various aspects of the processor such as caches, performance counters, and the like.	These registers, accessible via the RDMSR and WRMSR instructions, were added with the Pentium and later-model 486 processors. 8000001Dh - Pentium - PROBE MODE CONTROL REGISTER
Size:	32 bits
Access:	Read/Write


Bitfields for Probe Mode Control Register:
Bit(s)	Description	(Table R0058)
 31	(read-only) System Management Mode is active
 30-3	reserved (0)
 2	PB1 monitors breakpoint #1 matches instead of performance counter #1
 1	PB0 monitors breakpoint #0 matches instead of performance counter #0
 0	ICEBP enabled (every debug exception enters Probe Mode)