From: canniff johanna marie <canniff@ehhpx18.cen.uiuc.edu>
Subject: Exam Question
Date: Tuesday, September 30, 1997 1:30 PM

 
24 Points 2 per blank

  For the following instructions, decide which instructions are valid and
which are invalid.  In the third column, write the mod byte for valid
instructions, or a brief sentence about what is wrong with the invalid
instructions.

var  dw 45
var2 db 3

Instruction               Valid/Invalid   Mod Byte/ What's wrong
=======================   =============   ======================
mov dx, [si + di]            _______         __________________
mov bx, [var]                _______         __________________
mov si, cl                   _______         __________________
mov ax, [ax + di]            _______         __________________
mov cx, [bx + si + var]      _______         __________________
mov di, [bp + var2]          _______         __________________