Addressing modes of 8085
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Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs. The various addressing modes that are defined in a given instruction set architecture define how machine language instructions in that architecture identify the operand(s) of each instruction.
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Addressing modes of 8086
The document describes the 8 addressing modes of the 8086 microprocessor. These are: 1) Immediate, where the operand is specified in the instruction itself. 2) Register, where operands are registers. 3) Direct memory, using a segment and offset address. 4) Register indirect, using a base register address. 5) Register relative, using a base register and displacement. 6) Base indexed, using a base and index register. 7) Relative indexed, using a base, index, and displacement. 8) Implied, where operands are implied and not specified.
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Addressing modes 8085
The 8085 microprocessor uses several addressing modes to specify the operands in instructions. These include implied, immediate, direct, register, and register indirect addressing modes. Implied addressing mode does not specify operands as they are implicit in the instruction. Immediate addressing mode embeds the operand in the instruction itself. Direct addressing directly specifies the memory location of the operand. Register addressing uses register operands. Register indirect addressing specifies the operand address using a register pair like the HL register.
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Architecture of 8085 microprocessor
The document discusses the architecture of the Intel 8085 microprocessor. It describes the 8085 as an 8-bit microprocessor introduced in 1976 that uses a single +5 volt power supply. The internal architecture includes a control unit, arithmetic logic unit (ALU), registers including the accumulator, program counter, stack pointer, instruction register/decoder, and timing and control unit. The document also briefly discusses interrupts, serial I/O, and some applications of microprocessors like mobile phones, watches, and appliances.
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8086 micro processor
The Intel 8086 is a 16-bit microprocessor that can access up to 1 MB of memory. It has two main components: the Bus Interface Unit (BIU) handles bus operations like instruction fetching and memory access, while the Execution Unit (EU) decodes and executes instructions. The BIU contains registers for the code, data, extra, and stack segments as well as an instruction queue. The EU has registers for accumulation, base, count, data, pointers, and flags, and contains an ALU and decoder. It executes instructions from the queued bytes using a pipeline architecture.
8085 instruction set
This document provides an overview of the instruction set of the 8085 microprocessor. It begins by defining what an instruction is and the classification of the 8085 instruction set. It then proceeds to describe various data transfer, arithmetic, logical, branching, and control instructions in detail through opcode, operands, examples, and before/after execution illustrations. The document aims to provide a comprehensive reference for the complete set of 246 instructions supported by the 8085 microprocessor.
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Addressing modes of 8086
The document describes the 8 addressing modes of the 8086 microprocessor. These are: 1) Immediate, where the operand is specified in the instruction itself. 2) Register, where operands are registers. 3) Direct memory, using a segment and offset address. 4) Register indirect, using a base register address. 5) Register relative, using a base register and displacement. 6) Base indexed, using a base and index register. 7) Relative indexed, using a base, index, and displacement. 8) Implied, where operands are implied and not specified.
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The 8085 microprocessor uses several addressing modes to specify the operands in instructions. These include implied, immediate, direct, register, and register indirect addressing modes. Implied addressing mode does not specify operands as they are implicit in the instruction. Immediate addressing mode embeds the operand in the instruction itself. Direct addressing directly specifies the memory location of the operand. Register addressing uses register operands. Register indirect addressing specifies the operand address using a register pair like the HL register.
8257 DMA Controller
The DMA controller (8257) allows data transfer between I/O devices and memory without CPU involvement. It has 4 independent channels that can be programmed to transfer data via DMA read, write, or verify operations. The 8257 interfaces with the 8085 microprocessor by controlling address/data buses and generating control signals during DMA cycles when it acts as the bus master.
Architecture of 8085 microprocessor
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8086 micro processor
The Intel 8086 is a 16-bit microprocessor that can access up to 1 MB of memory. It has two main components: the Bus Interface Unit (BIU) handles bus operations like instruction fetching and memory access, while the Execution Unit (EU) decodes and executes instructions. The BIU contains registers for the code, data, extra, and stack segments as well as an instruction queue. The EU has registers for accumulation, base, count, data, pointers, and flags, and contains an ALU and decoder. It executes instructions from the queued bytes using a pipeline architecture.
8085 instruction set
This document provides an overview of the instruction set of the 8085 microprocessor. It begins by defining what an instruction is and the classification of the 8085 instruction set. It then proceeds to describe various data transfer, arithmetic, logical, branching, and control instructions in detail through opcode, operands, examples, and before/after execution illustrations. The document aims to provide a comprehensive reference for the complete set of 246 instructions supported by the 8085 microprocessor.
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Instruction set-of-8085
The instruction set of the 8085 microprocessor contains 246 instructions that are classified into different types such as data transfer, arithmetic, logical, branching, and control instructions. Data transfer instructions move data between registers and memory locations. Arithmetic instructions perform operations like addition, subtraction, increment, and decrement. Logical instructions perform logical operations like AND, OR, XOR on registers and memory.
ADDRESSING MODES OF 8085
This document discusses the addressing modes of the 8085 microprocessor. It explains that an addressing mode refers to how the operand of an instruction is specified. The 8085 supports 5 addressing modes: direct, register, register indirect, immediate, and implicit. Each mode is then described with an example instruction to illustrate how the source and destination addresses are specified differently depending on the addressing mode used.
Addressing modes-of-8085
The document discusses the different addressing modes used by the Intel 8085 microprocessor. It describes 5 addressing modes: direct, register, register indirect, immediate, and implicit. Direct addressing specifies the operand address in the instruction itself. Register addressing uses processor registers as the operand. Register indirect addressing specifies the operand address using a register pair. Immediate addressing encodes the operand within the instruction. Implicit addressing has fixed source and destination registers, so no operands are needed.
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The document discusses the 8086 system bus structure. It describes the minimum and maximum modes of operation for the 8086 microprocessor. In minimum mode, the 8086 issues control signals directly to memory and I/O devices. In maximum mode, control signals are issued by the Intel 8288 bus controller to support multiprocessor systems. The document also covers programmed and interrupt-driven I/O techniques for data transfer with input/output devices.
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The document discusses input/output (I/O) interfacing techniques with the 8085 microprocessor. It describes the fundamentals of I/O devices like input and output ports, and how they are used to transfer data to and from devices like keyboards and displays. The document outlines two techniques for interfacing I/O devices: memory mapped I/O which uses memory addresses and instructions to transfer data, and I/O mapped I/O which uses dedicated I/O addresses and instructions. Circuits for decoding addresses to select specific I/O devices are also presented.
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The document discusses the minimum and maximum mode configurations of the 8086 microprocessor. In minimum mode, a single 8086 processor controls all signals and there is one microprocessor. In maximum mode, more than one microprocessor is present and status signals determine control signals from a bus controller chip. The document also provides details on the pins, signals, and timing diagrams used in read, write, and bus request cycles for both minimum and maximum mode configurations.
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The document discusses the addressing modes used by the Intel 8085 microprocessor. It explains that an instruction specifies an operation along with the source and destination addresses. The Intel 8085 supports 5 addressing modes: direct, register, register indirect, immediate, and implicit. Each mode is defined by how the source or destination operand address is specified in the instruction.
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This document discusses memory and I/O interfacing with the 8085 microprocessor. It defines interfaces as points of interaction between components that allow communication. Memory interfacing requires address decoding and multiplexing of address and data lines. I/O devices can be interfaced either through memory mapping or I/O mapping. Common memory types include RAM, ROM, SRAM and DRAM. RAM can be static or dynamic. ROM includes PROM, EPROM and EEPROM. A stack is a reserved part of memory used to temporarily store information during program execution.
Architecture of 8086 Microprocessor
The 8086 microprocessor has an architecture that separates it into a Bus Interface Unit (BIU) and Execution Unit (EU). The BIU fetches instructions and data from memory and handles address calculation on the buses. The EU decodes and executes instructions using its 16-bit ALU. The 8086 has 16 general purpose registers including 4 data registers (AX, BX, CX, DX) and segment/pointer registers. It also contains a flag register for storing status flags. The 8086 can queue up to 6 bytes of upcoming instructions to improve performance.
Memory interfacing
INTRODUCTION
We know that a microprocessor is the CPU of a computer. A microprocessor can perform some operation on a data and give the output. But to perform the operation we need an input to enter the data and an output to display the results of the operation. So we are using a keyboard and monitor as Input and output along with the processor. Microprocessors engineering involves a lot of other concepts and we also interface memory elements like ROM, EPROM to access the memory.
Types of Interfacing
There are two types of interfacing in context of the 8085 processor.
Memory Interfacing.
I/O Interfacing.
Memory Interfacing:
While executing an instruction, there is a necessity for the microprocessor to access memory frequently for reading various instruction codes and data stored in the memory. The interfacing circuit aids in accessing the memory.
Memory requires some signals to read from and write to registers. Similarly the microprocessor transmits some signals for reading or writing a data.
But what is the purpose of interfacing circuit here?
The interfacing process involves matching the memory requirements with the microprocessor signals. The interfacing circuit therefore should be designed in such a way that it matches the memory signal requirements with the signals of the microprocessor. For example for carrying out a READ process, the microprocessor should initiate a read signal which the memory requires to read a data. In simple words, the primary function of a memory interfacing circuit is to aid the microprocessor in reading and writing a data to the given register of a memory chip.
The interfacing process involves matching the memory requirements with the microprocessor signals. The interfacing circuit therefore should be designed in such a way that it matches the memory signal requirements with the signals of the microprocessor. For example for carrying out a READ process, the microprocessor should initiate a read signal which the memory requires to read a data. In simple words, the primary function of a memory interfacing circuit is to aid the microprocessor in reading and writing a data to the given register of a memory chip.
I/O Interfacing:
We know that keyboard and Displays are used as communication channel with outside world. So it is necessary that we interface keyboard and displays with the microprocessor. This is called I/O interfacing. In this type of interfacing we use latches and buffers for interfacing the keyboards and displays with the microprocessor.
But the main disadvantage with this interfacing is that the microprocessor can perform only one function. It functions as an input device if it is connected to buffer and as an output device if it is connected to latch. Thus the capability is very limited in this type of interfacing.
DMA and DMA controller
The document discusses direct memory access (DMA) and DMA controllers. It explains that DMA allows hardware subsystems like disk drives and graphics cards to access main memory independently of the CPU. This is useful because it allows data transfers to occur in parallel with other CPU operations, improving overall system performance. A DMA controller generates memory addresses and initiates read/write cycles. It has registers that specify the I/O port, transfer direction, and number of bytes to transfer per burst. DMA controllers use different transfer modes like burst, cycle stealing, and transparent to move blocks of data efficiently between peripheral devices and memory.
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The document discusses stacks, subroutines, and the 8085 microprocessor. It provides the following key points:
1. The stack is an area of memory used for temporary storage of information in LIFO (last in first out) order, growing backwards into memory with the stack pointer register defining the bottom.
2. Subroutines allow groups of instructions to be called from different locations to avoid repetition. The 8085 uses CALL to redirect execution to a subroutine and RTE to return to the calling routine.
3. Data can be passed to subroutines through registers or memory locations. Proper subroutines only enter at the start and exit at the end, with a single entry point
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Addressing Modes Of 8086
The document discusses the different addressing modes of the 8086 processor. It explains that addressing modes refer to the different ways a processor can access data. It then describes the 8 addressing modes of the 8086 - immediate, direct, register, register indirect, indexed, register relative, based indexed, and relative based indexed. For each mode, it provides an example of how the MOV instruction is used with that addressing mode and how the physical address is calculated.
Addressing modes of 8086
This document discusses various addressing modes of the 8086 microprocessor. It defines addressing modes as how operands are specified in an instruction. There are 8 main addressing modes - immediate, direct, register, register indirect, indexed, register relative, based indexed, and relative based indexed. Each mode is explained with examples of how operand values are accessed from memory or registers to perform operations. The document also discusses intrasegment and intersegment addressing modes which specify if the source and destination locations are within the same memory segment or different segments.
Addressing mode Computer Architecture
This document discusses different addressing modes used in computer architecture. It defines 10 addressing modes: immediate, register, register indirect, direct, indirect, implied, relative, indexed, base register, and autoincrement/autodecrement. Each addressing mode is described in terms of how the operand is specified and accessed from memory or registers. Examples are provided to illustrate each addressing mode.
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The stack in the 8085 microprocessor is a group of memory locations used for temporary storage of data during program execution. Data is stored and retrieved on a last-in, first-out basis. The PUSH instruction stores data in the stack by decrementing the stack pointer and copying register contents to memory. The POP instruction retrieves data from the stack by copying memory contents back to registers and incrementing the stack pointer. Common register pairs that can be pushed and popped include BC, DE, HL, and A and flags.
Addressing modes 8085
The document discusses the different addressing modes of the 8085 microprocessor. There are four addressing modes: immediate addressing where data is present in the instruction, register addressing where data is provided through registers, direct addressing used to accept data from outside devices, and indirect addressing where the processor calculates an effective address from which to obtain the actual data address.
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The document discusses interrupts in the 8085 microprocessor. It defines interrupts as a mechanism to suspend normal execution and service external devices or instructions. The 8085 has hardware and software interrupts. Hardware interrupts can be maskable or non-maskable. Maskable interrupts like RST 7.5, 6.5, 5.5 and INTR can be enabled and disabled, while the non-maskable TRAP interrupt cannot. Software interrupts use RST instructions to redirect execution to subroutines.
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The instruction set of the 8085 microprocessor contains 246 instructions that are classified into different types such as data transfer, arithmetic, logical, branching, and control instructions. Data transfer instructions move data between registers and memory locations. Arithmetic instructions perform operations like addition, subtraction, increment, and decrement. Logical instructions perform logical operations like AND, OR, XOR on registers and memory.
ADDRESSING MODES OF 8085
This document discusses the addressing modes of the 8085 microprocessor. It explains that an addressing mode refers to how the operand of an instruction is specified. The 8085 supports 5 addressing modes: direct, register, register indirect, immediate, and implicit. Each mode is then described with an example instruction to illustrate how the source and destination addresses are specified differently depending on the addressing mode used.
Addressing modes-of-8085
The document discusses the different addressing modes used by the Intel 8085 microprocessor. It describes 5 addressing modes: direct, register, register indirect, immediate, and implicit. Direct addressing specifies the operand address in the instruction itself. Register addressing uses processor registers as the operand. Register indirect addressing specifies the operand address using a register pair. Immediate addressing encodes the operand within the instruction. Implicit addressing has fixed source and destination registers, so no operands are needed.
Unit 2 mpmc
The document discusses the 8086 system bus structure. It describes the minimum and maximum modes of operation for the 8086 microprocessor. In minimum mode, the 8086 issues control signals directly to memory and I/O devices. In maximum mode, control signals are issued by the Intel 8288 bus controller to support multiprocessor systems. The document also covers programmed and interrupt-driven I/O techniques for data transfer with input/output devices.
Interfacing of io device to 8085
The document discusses input/output (I/O) interfacing techniques with the 8085 microprocessor. It describes the fundamentals of I/O devices like input and output ports, and how they are used to transfer data to and from devices like keyboards and displays. The document outlines two techniques for interfacing I/O devices: memory mapped I/O which uses memory addresses and instructions to transfer data, and I/O mapped I/O which uses dedicated I/O addresses and instructions. Circuits for decoding addresses to select specific I/O devices are also presented.
Minimum mode and Maximum mode Configuration in 8086
The document discusses the minimum and maximum mode configurations of the 8086 microprocessor. In minimum mode, a single 8086 processor controls all signals and there is one microprocessor. In maximum mode, more than one microprocessor is present and status signals determine control signals from a bus controller chip. The document also provides details on the pins, signals, and timing diagrams used in read, write, and bus request cycles for both minimum and maximum mode configurations.
8085 addressing modes
The document discusses the addressing modes used by the Intel 8085 microprocessor. It explains that an instruction specifies an operation along with the source and destination addresses. The Intel 8085 supports 5 addressing modes: direct, register, register indirect, immediate, and implicit. Each mode is defined by how the source or destination operand address is specified in the instruction.
Memory & I/O interfacing
This document discusses memory and I/O interfacing with the 8085 microprocessor. It defines interfaces as points of interaction between components that allow communication. Memory interfacing requires address decoding and multiplexing of address and data lines. I/O devices can be interfaced either through memory mapping or I/O mapping. Common memory types include RAM, ROM, SRAM and DRAM. RAM can be static or dynamic. ROM includes PROM, EPROM and EEPROM. A stack is a reserved part of memory used to temporarily store information during program execution.
Architecture of 8086 Microprocessor
The 8086 microprocessor has an architecture that separates it into a Bus Interface Unit (BIU) and Execution Unit (EU). The BIU fetches instructions and data from memory and handles address calculation on the buses. The EU decodes and executes instructions using its 16-bit ALU. The 8086 has 16 general purpose registers including 4 data registers (AX, BX, CX, DX) and segment/pointer registers. It also contains a flag register for storing status flags. The 8086 can queue up to 6 bytes of upcoming instructions to improve performance.
Memory interfacing
INTRODUCTION
We know that a microprocessor is the CPU of a computer. A microprocessor can perform some operation on a data and give the output. But to perform the operation we need an input to enter the data and an output to display the results of the operation. So we are using a keyboard and monitor as Input and output along with the processor. Microprocessors engineering involves a lot of other concepts and we also interface memory elements like ROM, EPROM to access the memory.
Types of Interfacing
There are two types of interfacing in context of the 8085 processor.
Memory Interfacing.
I/O Interfacing.
Memory Interfacing:
While executing an instruction, there is a necessity for the microprocessor to access memory frequently for reading various instruction codes and data stored in the memory. The interfacing circuit aids in accessing the memory.
Memory requires some signals to read from and write to registers. Similarly the microprocessor transmits some signals for reading or writing a data.
But what is the purpose of interfacing circuit here?
The interfacing process involves matching the memory requirements with the microprocessor signals. The interfacing circuit therefore should be designed in such a way that it matches the memory signal requirements with the signals of the microprocessor. For example for carrying out a READ process, the microprocessor should initiate a read signal which the memory requires to read a data. In simple words, the primary function of a memory interfacing circuit is to aid the microprocessor in reading and writing a data to the given register of a memory chip.
The interfacing process involves matching the memory requirements with the microprocessor signals. The interfacing circuit therefore should be designed in such a way that it matches the memory signal requirements with the signals of the microprocessor. For example for carrying out a READ process, the microprocessor should initiate a read signal which the memory requires to read a data. In simple words, the primary function of a memory interfacing circuit is to aid the microprocessor in reading and writing a data to the given register of a memory chip.
I/O Interfacing:
We know that keyboard and Displays are used as communication channel with outside world. So it is necessary that we interface keyboard and displays with the microprocessor. This is called I/O interfacing. In this type of interfacing we use latches and buffers for interfacing the keyboards and displays with the microprocessor.
But the main disadvantage with this interfacing is that the microprocessor can perform only one function. It functions as an input device if it is connected to buffer and as an output device if it is connected to latch. Thus the capability is very limited in this type of interfacing.
DMA and DMA controller
The document discusses direct memory access (DMA) and DMA controllers. It explains that DMA allows hardware subsystems like disk drives and graphics cards to access main memory independently of the CPU. This is useful because it allows data transfers to occur in parallel with other CPU operations, improving overall system performance. A DMA controller generates memory addresses and initiates read/write cycles. It has registers that specify the I/O port, transfer direction, and number of bytes to transfer per burst. DMA controllers use different transfer modes like burst, cycle stealing, and transparent to move blocks of data efficiently between peripheral devices and memory.
Stacks & subroutines 1
The document discusses stacks, subroutines, and the 8085 microprocessor. It provides the following key points:
1. The stack is an area of memory used for temporary storage of information in LIFO (last in first out) order, growing backwards into memory with the stack pointer register defining the bottom.
2. Subroutines allow groups of instructions to be called from different locations to avoid repetition. The 8085 uses CALL to redirect execution to a subroutine and RTE to return to the calling routine.
3. Data can be passed to subroutines through registers or memory locations. Proper subroutines only enter at the start and exit at the end, with a single entry point
Instruction Set of 8051 Microcontroller
Arithmetic instructions of 8051 Microcontroller performs arithmetic operations like addition, subtraction, multiplication, and division.
Addressing modes of 8051
The document discusses the addressing modes and instruction set of the 8051 microcontroller. It describes the 5 addressing modes of the 8051 as immediate, register, direct, register indirect, and indexed. It then explains some example instructions from the arithmetic, logical, data transfer, branching/looping instruction groups of the 8051 instruction set.
Addressing Modes Of 8086
The document discusses the different addressing modes of the 8086 processor. It explains that addressing modes refer to the different ways a processor can access data. It then describes the 8 addressing modes of the 8086 - immediate, direct, register, register indirect, indexed, register relative, based indexed, and relative based indexed. For each mode, it provides an example of how the MOV instruction is used with that addressing mode and how the physical address is calculated.
Addressing modes of 8086
This document discusses various addressing modes of the 8086 microprocessor. It defines addressing modes as how operands are specified in an instruction. There are 8 main addressing modes - immediate, direct, register, register indirect, indexed, register relative, based indexed, and relative based indexed. Each mode is explained with examples of how operand values are accessed from memory or registers to perform operations. The document also discusses intrasegment and intersegment addressing modes which specify if the source and destination locations are within the same memory segment or different segments.
Addressing mode Computer Architecture
This document discusses different addressing modes used in computer architecture. It defines 10 addressing modes: immediate, register, register indirect, direct, indirect, implied, relative, indexed, base register, and autoincrement/autodecrement. Each addressing mode is described in terms of how the operand is specified and accessed from memory or registers. Examples are provided to illustrate each addressing mode.
Stack in 8085 microprocessor
The stack in the 8085 microprocessor is a group of memory locations used for temporary storage of data during program execution. Data is stored and retrieved on a last-in, first-out basis. The PUSH instruction stores data in the stack by decrementing the stack pointer and copying register contents to memory. The POP instruction retrieves data from the stack by copying memory contents back to registers and incrementing the stack pointer. Common register pairs that can be pushed and popped include BC, DE, HL, and A and flags.
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The document discusses infix, prefix and postfix notation for mathematical expressions. It provides examples of converting expressions between these notations. It also describes evaluating postfix expressions using a stack, and converting infix expressions to postfix using precedence rules.
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The document discusses the addressing modes of the 8085 microprocessor. It defines addressing modes as the method used to specify the address of operands in instructions. The 8085 supports five addressing modes: direct, register, register indirect, immediate, and implicit. Addressing modes provide flexibility, optimize memory and performance, and reduce code size. The challenges associated with 8085 addressing modes include limited range, complex instructions, and limited mode options. Advantages are versatility and efficiency, while disadvantages are complexity and debugging difficulties.
Addressing modes of 8085
The document discusses the addressing modes of the 8085 microprocessor. It defines an addressing mode as the way operands are specified in an instruction. It then describes the five addressing modes of the 8085: immediate, register, direct, register indirect, and implied. Immediate mode embeds the data in the instruction. Register mode uses register-stored data. Direct mode specifies the data address in the instruction. Register indirect mode uses a register pair containing the data address. Implied mode uses the opcode to determine the implied operand.
module-3.pptx
This document discusses addressing modes and instruction sets for 8051 microcontrollers. It describes 5 addressing modes: immediate, direct, register direct, register indirect, and indexed addressing. It also outlines various instruction types like data transfer, arithmetic, logic, loop/jump, call, and flag instructions. Specific instructions and their machine cycle times are provided. Jump and call instructions like SJMP, LJMP, ACALL, and LCALL are explained along with examples. Finally, rotate instructions like RL, RLC, RR, and RRC are listed.
Addresing mode and timing diagram
This document discusses the different addressing modes of the 8085 microprocessor, including direct, register, register indirect, immediate, and implicit addressing modes. It provides examples of instructions that use each addressing mode, showing the operation, source, and destination. The document also discusses the timing diagram of the 8080, explaining that it displays the initiation of read/write operations controlled by status signals. It notes that the microprocessor performs fetch and execute operations in machine cycles identified by unique status signal combinations.
Addressing Modes of 8085 Microprocessor
The document discusses the various addressing modes of the 8085 microprocessor. It explains that addressing modes specify the format for operands in instructions. The 5 addressing modes of the 8085 are direct, register, immediate, register indirect, and implied. Direct mode specifies the operand address directly in the instruction. Register mode uses register operands. Immediate mode embeds the operand data in the instruction. Register indirect mode specifies the operand address using a register pair. Implied mode does not require any explicit operands.
instruction format and addressing modes
This document discusses computer instruction types and addressing modes in microprocessors. It begins by defining an instruction as a command that tells the microprocessor to perform a task on data. Instructions are made up of opcodes and operands. Instructions are classified by word size into one-byte, two-byte, and three-byte instructions. The document then explains the five addressing modes used in the 8085 microprocessor: immediate, register, direct, indirect, and implicit. Each addressing mode specifies how the operand or data is addressed in memory for an instruction.
Lecture 10
The document summarizes addressing modes in microprocessors. It discusses:
- Three main types of addressing modes - stack-memory, data, and program-memory.
- Data addressing modes include immediate, direct, indirect, register, register indirect, implied, auto increment/decrement, relative, indexed, and base register.
- Direct addressing mode specifies the direct memory address of the operand. An example shows loading data from memory location 2805 to register A.
- Immediate addressing mode encodes the data directly in the instruction. An example shows moving the value 2550H into register AX.
- An example problem demonstrates calculating the effective address and operand value for direct and immediate modes.
Addressing modes of 8085 by Er. Swapnil V. Kaware
The document discusses the different addressing modes of the 8085 microprocessor. It defines addressing modes as the ways that an instruction's operands can be accessed. The 5 addressing modes of the 8085 are: 1) Immediate, where data is included in the instruction, 2) Register, where operands are in registers, 3) Direct, where the operand's address is in the instruction, 4) Register Indirect, where the operand's address is stored in a register pair, and 5) Implied, where the opcode specifies the operand without an explicit address. Examples are provided for each addressing mode.
Addressing mode & data transfer instruction of 8085
The document discusses addressing modes and data transfer instructions of the 8085 microprocessor. It defines addressing modes as the various ways of specifying operands in an instruction. The 8085 supports direct, register, indirect, immediate, and implied addressing modes. It then explains each data transfer instruction in detail, including MOV, MVI, LDA, LHLD, STA, XCHG, PUSH and POP. The instructions are used to move data between registers and memory in the microprocessor.
Addressing modes
The document discusses different addressing modes used in microprocessors, including the 8086. It describes five main addressing modes: immediate, register, direct, register indirect, and implicit. Immediate addressing uses data contained in the instruction itself. Register addressing uses operands in registers. Direct addressing directly specifies a memory location. Register indirect addressing uses a memory location pointed to by a register pair. Implicit addressing hides the operand in the instruction. The document provides examples of instructions that use each addressing mode.
Addressing Modes.pptx
The document discusses different types of addressing modes used in computer instructions, including implied, immediate, direct, indirect, register direct, register indirect, relative, indexed, base register, auto-increment, and auto-decrement addressing modes. It provides examples and explanations of each addressing mode type.
8051 addressing
This document discusses the different addressing modes of the 8051 microcontroller. It describes five addressing modes: immediate, direct, register direct, register indirect, and indexed. The immediate addressing mode transfers an 8-bit data directly to the accumulator. The direct addressing mode specifies the address of the source data instead of an immediate value. The register direct mode uses a register name as the source operand. The register indirect mode uses the value in a register as the address of the source data. Finally, the indexed addressing mode adds the value of a register like the data pointer or program counter to the accumulator to use as the address.
Microprocessor and Microcontroller.pptx
The document provides an overview of microprocessors and microcontrollers. It discusses the basic concepts of microprocessors including the definition, components like the ALU, registers, control unit, memory and system bus. It describes how a microprocessor works and introduces machine language and 8085 assembly language. The later lectures discuss the internal architecture, registers, pin configuration and instruction set of the 8085 microprocessor. It also covers addressing modes, classification of instructions and use of the stack in 8085.
addressingmodes8051.ppt
The document discusses the addressing modes and instruction set of the 8051 microcontroller. It describes the 5 addressing modes of 8051 as immediate, register, direct, register indirect, and indexed addressing modes. It then explains each addressing mode in detail along with examples. The document also discusses the different categories of instructions in 8051 like arithmetic, logical, data transfer, and branching instructions. It provides examples of commonly used instructions from each category.
Memory intrface and addrs modes
The document discusses various topics related to 8085 microprocessor architecture including instruction cycle, memory, addressing modes, and programming model. It provides examples of interfacing EPROM and RAM memory chips with an 8085 processor using address decoding techniques. It also describes the five addressing modes used by the 8085 - direct, register, register indirect, immediate, and implicit addressing modes.
microprocessor and microcontroller notes ppt
The document discusses the addressing modes and instruction set of the 8051 microcontroller. It describes the 5 addressing modes of 8051 as immediate, register, direct, register indirect and indexed addressing modes. It then explains each addressing mode in detail along with examples. The document also discusses the different types of instructions in 8051 like arithmetic, logical, data transfer, branching and looping instructions along with examples.
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- 2. Addressing Modes of 8085 • To perform any operation, we have to give the corresponding instructions to the microprocessor. • In each instruction, programmer has to specify 3 things: • Operation to be performed. • Address of source of data. • Address of destination of result. 2
- 3. Addressing Modes of 8085 The method by which the address of source of data or the address of destination of result is given in the instruction is called Addressing Modes. The term addressing mode refers to the way in which the operand of the instruction is specified. 3
- 4. Types of Addressing Modes • Intel 8085 uses the following addressing modes: 1. Direct Addressing Mode 2. Register Addressing Mode 3. Register Indirect Addressing Mode 4. Immediate Addressing Mode 5. Implicit Addressing Mode 4
- 5. Direct Addressing Mode In this mode, the address of the operand is given in the instruction itself. LDA is the operation. 2500 H is the address of source. Accumulator is the destination. 5 LDA 2500 H Load the contents of memory location 2500 H in accumulator.
- 6. Register Addressing Mode • In this mode, the operand is in general purpose register. • MOV is the operation. • B is the source of data. • A is the destination. 6 MOV A, B Move the contents of register B to A.
- 7. Register Indirect Addressing Mode • In this mode, the address of operand is specified by a register pair. • MOV is the operation. • M is the memory location specified by H-L register pair. • A is the destination. 7 MOV A, M Move data from memory location specified by H-L pair to accumulator.
- 8. Immediate Addressing Mode • In this mode, the operand is specified within the instruction itself. • MVI is the operation. • 05 H is the immediate data (source). • A is the destination. 8 MVI A, 05 H Move 05 H in accumulator.
- 9. Implicit Addressing Mode If address of source of data as well as address of destination of result is fixed, then there is no need to give any operand along with the instruction. CMA is the operation. A is the source. A is the destination. 9 CMA Complement accumulator.
- 10. Implicit Addressing Mode If address of source of data as well as address of destination of result is fixed, then there is no need to give any operand along with the instruction. CMA is the operation. A is the source. A is the destination. 9 CMA Complement accumulator.