FUNDAMENTALS OF COMPUTER

COMPUTER PROGRAMMING FUNDAMENTALS

WHAT IS PROGRAMMING

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What is the function of the STA mnemonic?
A
Storing the value in the Accumulator at the given memory address.
B
Branches to a given address if the value in the Accumulator is positive. It is a conditional branch.
C
it is meant to move data between registers and memory.
D
The operands will usually name another register to use as the load address, plus perhaps a 3rd register to be added or scaled and added, or a constant, or all of them above.
Explanation: 

Detailed explanation-1: -In 8085 Instruction set, STA is a mnemonic that stands for STore Accumulator contents in memory. In this instruction, Accumulator8-bit content will be stored to a memory location whose 16-bit address is indicated in the instruction as a16. This instruction uses absolute addressing for specifying the destination.

Detailed explanation-2: -STA 2400H: It stores the content of the accumulator in the memory location 2400H. 32, 00, 24: The above instruction in the code form. In this instruction, 2400H is the memory address where data is to be stored.

Detailed explanation-3: -STA (Store) Transfers a number from the accumulator to RAM. LDA (Load) Transfers a number from RAM to the accumulator.

Detailed explanation-4: -Which is of the following is true about STA instruction? Explanation: STA is a direct addressing mode instruction which stands for Store Accumulator Direct. It is a 3-byte instruction and it requires four machine cycles. In STA instruction memory is loaded with the content of the accumulator.

Detailed explanation-5: -An accumulator is primarily used as a register in a CPU to store intermediate logical or arithmetic data in multistep calculations. For such calculations, it functions as a temporary storage location.

There is 1 question to complete.