Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs. The various addressing modes that are...
45 KB (5,930 words) - 02:27, 24 June 2024
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...
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X86 assembly language (redirect from X86-assembly language in protected mode)
in MMX) registers. The x86 processor also includes complex addressing modes for addressing memory with an immediate offset, a register, a register with...
54 KB (6,902 words) - 01:59, 10 July 2024
X86-64 (redirect from 64-bit compatibility mode)
formats.) In 64-bit mode, instructions are modified to support 64-bit operands and 64-bit addressing mode. The compatibility mode defined in the architecture...
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In computing, protected mode, also called protected virtual address mode, is an operational mode of x86-compatible central processing units (CPUs). It...
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X86 (section Addressing modes)
in 64-bit mode, which is one of the two modes only available in long mode. The addressing modes were not dramatically changed from 32-bit mode, except that...
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PDP-11 architecture (section Addressing modes)
word versus byte addressing). Two groups of six bits specify the source operand addressing mode and the destination operand addressing mode, as defined above...
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WDC 65C02 (section New addressing modes)
involves the jump instruction when using indirect addressing. In this addressing mode, the target address of the JMP instruction is fetched from memory,...
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Classful network (redirect from Classful addressing)
256 local addresses. The leading bit sequence 111 designated an at-the-time unspecified addressing mode ("escape to extended addressing mode"), which was...
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sequence called inter-mode.[citation needed] Mode S equipped aircraft are assigned a unique ICAO 24-bit address or (informally) Mode-S "hex code" upon national...
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addressing mode. The base-plus-index and scale-plus-index forms of 32-bit addressing (encoded with r/m = 100 and mod ≠ 11) require another addressing...
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MOS Technology 6502 (section Addressing)
56 instructions with (possibly) multiple addressing modes. Depending on the instruction and addressing mode, the opcode may require zero, one or two additional...
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Flat memory model (redirect from Linear address mode)
memory addressing paradigm in which "memory appears to the program as a single contiguous address space." The CPU can directly (and linearly) address all...
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WD16 (section Addressing modes)
destination addressing mode and register. If field I = 0, designated register contains the address of the operand, the equivalent of addressing mode (Rn). If...
47 KB (2,874 words) - 03:26, 4 June 2024
bits: n: Indirect addressing flag i: Immediate addressing flag x: Indexed addressing flag b: Base address-relative flag p: Program counter-relative flag...
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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...
15 KB (1,327 words) - 13:36, 26 January 2024
to address the main memory. Such devices, therefore, also need to have a knowledge of physical addresses. Address constant Addressing mode Address space...
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WDC 65C816 (section 24-bit addressing)
stack relative addressing provides capability for reentrant, recursive and re-locatable programming. 24 addressing modes—13 original 6502 modes with 92 instructions...
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same MAC address. The IEEE 802 MAC address originally comes from the Xerox Network Systems Ethernet addressing scheme. This 48-bit address space contains...
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Indicating indirect addressing used separate opcodes, as opposed to using the addressing indication bits. When used, the address was constructed as normal...
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I²C (redirect from I²C address)
resemblance to other I2C bus modes is limited to: the start and stop conditions are used to delimit transfers, I2C addressing allows multiple target devices...
73 KB (8,501 words) - 17:06, 2 July 2024
IBM System/370-XA (section 31-bit virtual addressing)
24-bit-addressing and 31-bit-addressing code include two new register-register call/return instructions which also effect an addressing mode change,...
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another specifies the addressing mode. An orthogonal instruction set uniquely encodes all combinations of registers and addressing modes. In telecommunications...
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Control register (redirect from Supervisor mode execution protection)
performed by control registers include interrupt control, switching the addressing mode, paging control, and coprocessor control. The early CPU lacked dedicated...
32 KB (1,634 words) - 05:33, 19 March 2024
instruction types can use all addressing modes. It is "orthogonal" in the sense that the instruction type and the addressing mode vary independently. An orthogonal...
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Electronic visual display (section Addressing modes)
selective reflection. Each sub-pixel of a display device must be selected (addressed) in order to be energized in a controlled way. Display device ISO 13406-2...
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Kenbak-1 (section Addressing modes)
operand using five addressing modes: Immediate (operand is in second byte of instruction) Memory (second byte of instruction is the address of the operand)...
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instances (XA/370), the instruction address was 31 bits plus a mode bit (24 bit addressing mode if zero; 31 bit addressing mode if one) for a total of 32 bits...
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addressing require the SIB byte, which encodes 2-bit scale factor as well as 3-bit index and 3-bit base registers. Depending on the addressing mode,...
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Byte addressing in hardware architectures supports accessing individual bytes. Computers with byte addressing are sometimes called byte machines, in contrast...
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