What is the function of instruction add B?

What is the function of instruction add B?

1. ADD: – The content of operand are added to the content of the accumulator and the result is stored in Accumulator. Eg- ADD B (it adds the content of accumulator to the content of the register B)

What is the function of Dad D instruction?

In 8085 Instruction set, DAD SP instruction is a special case of DAD rp instruction. In this instruction contents of HL and SP will get added and sum thus produced will get stored onto HL register pair. It occupies only 1-Byte in memory.

Which type of instruction is ADD?

In 8085 Instruction set, ADD R is a mnemonic that stands for “Add contents of R to Accumulator”. As addition is a binary operation, so it requires two operands to be operated on. So input operands will reside on Accumulator and R registers and after addition the result will be stored back on to Accumulator.

What is the function of NOP instruction?

The NOP instruction does nothing. Execution continues with the next instruction. No registers or flags are affected by this instruction. NOP is typically used to generate a delay in execution or to reserve space in code memory.

What Xchg instruction will do?

In 8085 Instruction set, there is one mnemonic XCHG, which stands for eXCHanGe. This is an instruction to exchange contents of HL register pair with DE register pair. This instruction uses implied addressing mode. As it is1-Byte instruction, so It occupies only 1-Byte in the memory.

How push instruction works in 8086?

PUSH then places the operand on the new top of stack, which is pointed to by the stack pointer. The 80386 PUSH eSP instruction pushes the value of eSP as it existed before the instruction. This differs from the 8086, where PUSH SP pushes the new value (decremented by 2).

What is the function of DAA instruction in 8086?

The DAA (Decimal Adjust after Addition) instruction allows addition of numbers represented in 8-bit packed BCD code. It is used immediately after normal addition instruction operating on BCD codes. This instruction assumes the AL register as the source and the destination, and hence it requires no operand.