Question

annotare Quad BULUM ASSEMBLY/MICOCONTROLLER MID-TERM EXAM 03/04/2020 1. Assume that registers and memory locations contain the following values at the start of the instruction. Give each register or memory location that is modified by the following instructions and its new value. Which statements are not validinstructions WO (location) 0x1000 (value),0x1000 (location) 0x382A (value) W2 (location) 0x8345 (value), W1(location) 0x1003 (value) e valid a.mov W2, [Wo] b. mov #0x1000, WO C. mov Ox1000 d. mov.b W2, [W1] e. mov.b W2, WO f.mov.b #0x1000, WO (30) ponist

Answer 1

Option C is not a valid instruction because mov instruction needs a source and a destination. Here, one of the two things is not specified so C is wrong. Option A and B are right because they have a source and destination.

example destination register register register source register immediate mov ax,bx mov ax, 10h mov ax,es:[bx] mov aNumber, 10h mov aDigit, ax memory immediate register memory memory

mov.b w2,[w1] - move the lower byte from w2 to the address pointed to by w1. Thus, option D, E and F are also correct. E might be wrong due to syntax error.