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the accumulator is an 8-bit register then is part of the arithmetic/logic unit(ALU). this register is used to store to store 8-bit data and to perform arithmetic & logical operation. the result of an operation is stored in the accumulator. the accumulator is also identified as register A.
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What does A represent in 8085 A microprocessor?
'A' means ACCUMULATOR.
Why 8085 microprocessor called accumulator based?
The 8085 microprocessor is often referred to as accumulator-based because it primarily uses an accumulator register (register A) for arithmetic and logic operations. Most instructions directly operate on the data stored in the accumulator, which acts as the primary register for processing. This design simplifies the architecture and instruction set, allowing for faster data manipulation since the accumulator can be quickly accessed. Additionally, many instructions involve loading data into the accumulator, performing operations, and then storing the results back, emphasizing its central role in the microprocessor's operation.
What is RAL in a microprocessor 8085?
RAL rotates the content of accumulator Left from Carry
What is lda in microprocessor?
LDA is an Intel 8085 opcode, 3AH, that loads that accumulator from a location specified in memory.
What is STA 3000H in microprocessor?
STA 3000H is an 8085 instruction that says to store the accumulator at memory location 3000H.
In a microprocessor command ADD B means?
ADD B in a microprocessor means to add the contents of the accumulator to the B register and store the result in the accumulator. Flags are set according to the result - Z if zero, C if an unsigned carry occurred, AC if a BCD carry occurred, N if the result is signed negative, O if the parity is odd, OV if a signed overflow occurred. Note that not every microprocessor has every flag listed.
How many bits are contained in the A register of a 8085 CPU?
8085 is a 8 bit microprocessor and so A register which is also known as accumulator is also 8 bit.
What is 12 bit microprocessor?
The DEC PDP-8 is a 12 bit computer. A 12 bit computer is one where the accumulator and/or bus size is 12 bits.
What is an 12 bit microprocessor?
The DEC PDP-8 is a 12 bit computer. A 12 bit computer is one where the accumulator and/or bus size is 12 bits.
Timming diagram for lda instruction in microprocessor 8085?
The timing diagram for the LDA (Load Accumulator Direct) instruction in the 8085 microprocessor involves several key phases. Initially, the opcode is fetched from memory, which takes 4 clock cycles. Next, the address of the data to be loaded into the accumulator is specified in the next two cycles, followed by another two cycles to read the data from the specified memory location into the accumulator. The entire process typically takes 7 machine cycles, including the necessary memory access time.
Ora a is executed in intel 8085 microprocessor?
The ORA A instruction does not change the contents of the accumulator. It does, however, set flags to indicate something about the value of the accumulator. In particular, Z means the result is zero, N means it is negative, and P means it has an odd number of ones.
What is the flowchart of 8085 microprocessor for sawtooth on oscilloscope?
(start) load control bit in control register load 00h in accumulator loop:out it to port a increment a repeat loop
