The explanation of the 8086 instructions is as under:
i)LOOP NZ- Used to loop a group of instructions till it satisfies ZF = 0 & CX = 0.
ii)SCAS-Used to scan a string and compare its byte with a byte in AL or string word with a word in AX.
iii)AAD- Used to adjust ASCII codes after division.
iv)STD-Used to set the direction flag DF to 1.
