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For example, executing CPUID instruction with the EAX register set to '1' on x86 CPUs will result in values being placed in other registers that show the CPU's stepping level. Stepping identifiers commonly comprise a letter followed by a number, for example B2. Usually, the letter indicates the revision level of a CPU's base layers and the ...
Single-Step execution (enabled by EFLAGS.TF) [d] 15: BT: Task Switch breakpoint. [d] Occurs when a task switch is done with a TSS that has the T (debug trap flag) bit set. 16: RTM (Processors with Intel TSX only) Cleared to 0 by the processor for debug exceptions inside RTM transactions, [f] set to 1 for all debug exceptions outside transactions.
Instruction stepping or single cycle originally referred to the technique of stopping the processor clock and manually advancing it one cycle at a time. For this to be possible, three things are required: A control that allows the clock to be stopped (e.g. a "Stop" button).
Montage Jintide CPUs can be distinguished from the Intel Xeon CPU models they're based on by the presence of the substring Montage in the brand string of the Montage CPUs (e.g. Montage Jintide C2460 [164] and Intel Xeon Platinum 8160 [165] - both of which identify themselves as GenuineIntel Family 6 Model 55h Stepping 4 - can be distinguished ...
The contents of registers and memory locations can be examined; if they are correct, the system can be told to go on and execute the next instruction. The Intel 8086 trap flag and type-1 interrupt response make it quite easy to implement a single-step feature in an 8086-based system. If the trap flag is set, the 8086 will automatically do a ...
In the mid-1990s, a facility for supplying new microcode was initially referred to as the Pentium Pro BIOS Update Feature. [18] [19] It was intended that user-mode applications should make a BIOS interrupt call to supply a new "BIOS Update Data Block", which the BIOS would partially validate and save to nonvolatile BIOS memory; this could be supplied to the installed processors on next boot.
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The PCR contains a substructure called Processor Control Block (KPRCB), which contains information such as CPU step and a pointer to the thread object of the current thread. See also [ edit ]