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. 0000010Ah - IDTsee Interrupt Descriptor Table WinChip2 - Feature Control Register #4 Size: 6 bits Access: Read-Only 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. 00000109h Bitfields for IDTsee Interrupt Descriptor Table WinChip2 Feature Control Register #4: Bit(s) Description (Table R0066) 63..6 Reserved 5..2 DIVIDEND (if bus speed > 100MHz) DIVIDEND DIVISOR multiplier_for_100Mhz_bus 0101 01 x2.33 0011 00 x2.5 0110 01 x2.66 0100 00 x3.0 1000 01 x3.33 0101 00 x3.5 0110 00 x4.0 0111 00 x4.5 1..0 DIVISOR Fractional bus frequency multiplier 00 = x2 (on bus < 100 MHz multiplier based on 01 = x3 FCR4[1..0] only 10 = x4 11 = x5