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In the x86 computer architecture, HLT (halt) is an assembly language instruction which halts the central processing unit (CPU) until the next external interrupt is fired. [1] Interrupts are signals sent by hardware devices to the CPU alerting it that an event occurred to which it should react.
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 ...
Will change OperandSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. 67h: AddressSize override. Will change AddressSize from 16-bit to 32-bit if CS.D=0, or from 32-bit to 16-bit if CS.D=1. The 80386 also introduced the two new segment registers FS and GS as well as the x86 control, debug and test registers.
Download as PDF; Printable version; In other projects ... HLT (x86 instruction) ... Nga La language, spoken in Burma (ISO 639-3: hlt)
The primary defining characteristic of IA-32 is the availability of 32-bit general-purpose processor registers (for example, EAX and EBX), 32-bit integer arithmetic and logical operations, 32-bit offsets within a segment in protected mode, and the translation of segmented addresses to 32-bit linear addresses. The designers took the opportunity ...
The 32-bit flat memory model of the 80386's extended protected mode may be the most important feature change for the x86 processor family until AMD released x86-64 in 2003, as it helped drive large scale adoption of Windows 3.1 (which relied on protected mode) since Windows could now run many applications at once, including DOS applications, by ...
An HLABE program mostly consists of data (byte) emission statements, 32-bit relocatable address statements, x86 control-transfer instructions, and various directives. In addition to translating the byte and relocatable address statements into the low-level object code format, HLABE also handles branch-displacement optimization (picking the ...
DOS, OS/2, Windows (except for 64-bit editions), Concurrent DOS 286, FlexOS, Concurrent DOS 386, Multiuser DOS, System Manager, REAL/32, DOS Plus.EXE: No (x86 only) Yes Extension (Novell/Caldera VERSION etc.) No Extension Extension Extension No No MZ (GEM) GEM, ViewMAX.APP/.ACC: No (x86 only) Yes No No Unknown Unknown No No Unknown NE