8085 addressing modes(For College Seminars)
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This document discusses the addressing modes of the 8085 microprocessor. It introduces the 8085 and describes its key specifications. It then defines addressing modes as the method by which an instruction specifies the address of the source of data or destination of a result. Five addressing modes are described - direct, register, register indirect, immediate, and implicit. The document concludes that the addressing mode depends on the bytes in the instruction and allows the instruction to specify operands and data addresses.
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The 8085 microprocessor has 40 pins that are grouped into address bus, data bus, control and status bus, power supply and frequency pins, externally initiated and acknowledgement signals, and serial I/O ports. It was introduced in 1976 and has an 8-bit processor architecture with a 16-bit address bus, allowing it to access up to 64KB of memory. Internally, the 8085 includes an ALU, registers, timing and control unit, instruction register and decoder, and interrupt control unit.
MP_MC.pdf
This document provides information about microprocessors and microcontrollers, specifically the 8085 and 8086 microprocessors. It discusses the architecture, features, registers, addressing modes, instruction sets and interrupts of the 8085 and 8086 microprocessors. The 8085 is an 8-bit microprocessor designed by Intel in 1977 using NMOS technology. The 8086 is a 16-bit microprocessor designed by Intel that can access 1 megabyte of memory and has 14 registers. Both microprocessors have various addressing modes including immediate, register, direct, indirect and relative modes.
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- 2. ContentsContents Introduction to 8085 Addressing Modes of 8085 Types of Addressing Modes ◦ Direct Addressing Mode ◦ Register Addressing Mode ◦ Register Indirect Addressing Mode ◦ Immediate Addressing Mode ◦ Implicit Addressing Mode Conclusion References
- 3. Introduction to 8085Introduction to 8085 It was introduced in 1977. It is 8-bit microprocessor. It has 8 bit Data Bus. It has a 16 bit Address Bus. It contains 6200 transistors approx. Addressable Memory is 64 KB. 40 pins IC. Operating at a Clock Frequency of 5 MHz.
- 12. ConclusionConclusion Conclusion is that, 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 Mode. And, whatever the Addressing modes is there, the instruction consist of the operand, address of the source data, and destination of the result. Or, we can say that Addressing modes for the instructions is also depends on that what byte of instruction we input.