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. 00000108h - Centaur (IDTsee Interrupt Descriptor Table) C6/WinChip2 - Feature Control Register #2 Size: 64 bits SeeAlso: 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. 00000107h,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. 00000109h Bitfields for Centaur (IDTsee Interrupt Descriptor Table) C6/WinChip2 Feature Control Register #2: Bit(s) Description (Table R0039) 63-32 last four bytes of CPUID vendor ID string (see also #R0040) 31-15 reserved 14 use alternative CPUID vendor string 13-12 reserved 11-8 CPUID family 7-4 CPUID model 3-0 reserved SeeAlso: #R0038,#R0039