The first byte is the opcode, while the second and third bytes hold a 16-bit address or data (e.g., LXI H, 2050H , JMP 3000H ). Classification by Functional Grouping:
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Performs 8-bit arithmetic (add, subtract) and logical (AND, OR, XOR) operations. microprocessor 8085 ppt by gaonkar
The address is stored in a register pair (e.g., MOV A, M ).
DMA (Direct Memory Access) Controller for high-speed data bypass directly to memory. Slide 11: Summary and Legacy Slide Title: Conclusion and the Legacy of the 8085 Core Concepts: The first byte is the opcode, while the
A general-purpose, maskable, non-vectored interrupt. Requires an external device to supply an opcode instruction (usually an RST instruction) via the data bus.
Performs Boolean operations and bit modifications (e.g., ANA , XRA , ORA , CMP , CMA , RAR , RAL ). It democratizes access to Gaonkar’s expertise
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Set to 1 if the Most Significant Bit (D7) of the result is 1 (negative number).
RD and WR: Active low signals for reading and writing operations.
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