Question

Explain the following instruction of Micro-processor 8085 with an example:

STA addr

Answer 1

STA addr (Store Accumulator Direct). This instruction copies the content of the Accumulator into the memory location specified by the 16-bit address (addr) in the instruction. The content of the Accumulator remains unchanged. 

Example:

If A = 55H, executing STA 2000H will store 55H at memory location 2000H.