Addressing mode
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Addressing mode
the operand(s) of each instruction. An addressing mode specifies how to calculate the effective memory address of an operand by using information held...
Real mode
Real mode, also called real address mode, is an operating mode of all x86-compatible CPUs. The mode gets its name from the fact that addresses in real...
X86 assembly language
in MMX) registers. The x86 processor also includes complex addressing modes for addressing memory with an immediate offset, a register, a register with...
X86-64
64-bit mode, instructions are modified to support 64-bit operands and 64-bit addressing mode. The x86-64 architecture defines a compatibility mode that...
Protected mode
In computing, protected mode, also called protected virtual address mode, is an operational mode of x86-compatible central processing units (CPUs). It...
ModR/M
SIBMEM addressing. This addressing mode is used for instructions that perform a sequence of strided memory accesses. The effective address to use for...
Unreal mode
access to the entire memory. Contrary to its name, it is not a separate addressing mode that the x86 processors can operate in. It is used in the 80286 and...
X86
(INS/OUTS) Real mode (including huge real mode), 16-bit protected mode, VM86 16-bit addressing mode VT-x will no longer provide unrestricted mode 8259 support;...
Flat memory model
memory addressing paradigm in which "memory appears to the program as a single contiguous address space." The CPU can directly (and linearly) address all...
PDP-11 architecture
word versus byte addressing). Two groups of six bits specify the source operand addressing mode and the destination operand addressing mode, as defined above...