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Register pair used to indicate memory_____.
and C
and E
H and L
W and Z
H and L
In the Intel 8085 microprocessor, the H-L register pair is specifically designated as the Memory Pointer register pair. It holds the 16-bit address of the memory location currently being accessed during register-indirect addressing mode instructions.
In the Intel 8085 microprocessor, the H-L register pair is specifically designated as the Memory Pointer register pair. It holds the 16-bit address of the memory location currently being accessed during register-indirect addressing mode instructions.
Address=(HтЙк8)тИгL тАФ Calculation of the 16-bit memory address using the H-L pair
When an instruction uses the 'M' operand (e.g., MOV A, M), the microprocessor looks at the contents of the H and L registers as a concatenated 16-bit memory address. The H register provides the high-order byte and the L register provides the low-order byte. This mechanism allows the programmer to dynamically point to any location in the 64KB address space of the 8085.
The H-L pair functions as a 16-bit address register for memory-related operations.
Instruction set uses 'M' as a mnemonic to represent memory locations pointed by H-L.
It is the only register pair in 8085 that can be used directly for indirect memory addressing.
The 8085 architecture supports a total address space of 2┬░16=65,536 bytes.
Allows dynamic memory addressing during program execution.
Simplifies data manipulation in arrays or tables within memory.
Requires two clock cycles to load/store from memory via indirect addressing.
Consumes a general-purpose register pair that could otherwise store temporary data.
Table look-up operations
String/Array processing
Stack manipulation
Data moving between memory and CPU registers
Option A (B and C) is a general-purpose register pair used for data storage or 16-bit counters.
Option B (D and E) is a general-purpose register pair used for double-precision arithmetic operations like DAD.
Option D (W and Z) are temporary registers used by the internal hardware for arithmetic logic operations and are not accessible to the programmer.
C is correct тАФ The H and L register pair serves as the primary memory pointer in the Intel 8085 microprocessor.
Always remember that while B-C, D-E, and H-L are all 16-bit register pairs, H-L is the only one intended for memory addressing in the 8085 instruction set.