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But they can also be caused by bus errors introduced by other failing components, like memory or I/O devices. Possible causes include: Poor CPU cooling due to a CPU heatsink and case fans (or filters) that's clogged with dust or has come loose. Overclocking beyond the highest clock rate at which the CPU is still reliable. Failing motherboard.
The WDC 65C816 adds a fourth hardware interrupt— ABORT, useful for implementing virtual memory architectures—and the COP software interrupt instruction (also present in the 65C802), intended for use in a system with a coprocessor of some type (e.g., a floating-point processor). [1] [2]
BIOS interrupt calls perform hardware control or I/O functions requested by a program, return system information to the program, or do both. A key element of the purpose of BIOS calls is abstraction - the BIOS calls perform generally defined functions, and the specific details of how those functions are executed on the particular hardware of the system are encapsulated in the BIOS and hidden ...
A hardware interrupt is a condition related to the state of the hardware that may be signaled by an external hardware device, e.g., an interrupt request (IRQ) line on a PC, or detected by devices embedded in processor logic (e.g., the CPU timer in IBM System/370), to communicate that the device needs attention from the operating system (OS) [7] or, if there is no OS, from the bare metal ...
The interrupt descriptor table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table. The IDT is used by the processor to determine the memory addresses of the handlers to be executed on interrupts and exceptions. The details in the description below apply specifically to the x86 architecture.
Causing memory-protection interrupts were used for software interrupts. [8] Processor allocation scheduling with a quantum time unit 200 ms, was controlled by a multilevel feedback queue . [ 28 ] It also had some special memory-management hardware, [ 30 ] a clock interrupt, [ 31 ] and the ability to trap certain instructions.
the segment selector in a call, interrupt or trap gate does not point to a code segment; violating privilege rules; enabling paging whilst disabling protection; referencing the interrupt descriptor table following an interrupt or exception that is not an interrupt, trap, or a task gate; Legacy SSE: Memory operand is not 16-byte aligned.
The Motorola 6800 microprocessor was the first for which an undocumented assembly mnemonic HCF became widely known. The operation codes (opcodes—the portions of the machine language instructions that specify an operation to be performed) hexadecimal 9D and DD were reported and given the unofficial mnemonic HCF in a December 1977 article by Gerry Wheeler in BYTE magazine on undocumented ...