The MSP430 can move/copy a byte or a word at a time using the instructions mov.b and mov.w respectively. In particular, the instructions mov.b &source_address, R4 mov.w &source_address, R4 copy the byte or word that resides at the given address (&source_address) to the given destination (the core register R4 in the CPU). Which of the following instructions are valid? (a) mov.b &0x1C03, R4 (b) mov.w &0x1C02, R4 (c) mov.b &0x1C00, R4 (d) mov.w &0x1C05, R4
![Q: B2.JPG MOV SP,[BP+DI+ACBAH] ВJPG PHY. ADD| С6079H АСH C607AH BDH С607вн | СЕН C607CH| F1H C607DH 02H…A: We need to find required addresses for given assembly code.](/questions-and-answers/b2.jpg-mov-spbpdiacbah-vjpg-phy.-addor-s6079h-ash-c607ah-bdh-s607vn-or-sen-c607chor-f1h-c607dh-02h-c/d2194d0d-d943-4cd8-84e9-b380c338f2bd){kind=link}
The MSP430 can move/copy a byte or a word at a time using the instructions mov.b and
mov.w respectively. In particular, the instructions
mov.b &source_address, R4
mov.w &source_address, R4
copy the byte or word that resides at the given address (&source_address) to the given
destination (the core register R4 in the CPU). Which of the following instructions are valid?
(a) mov.b &0x1C03, R4
(b) mov.w &0x1C02, R4
(c) mov.b &0x1C00, R4
(d) mov.w &0x1C05, R4
Solution:
The validity of the instructions depends on the architecture of the MSP430 and the memory layout. If the memory is byte-addressable and the address is word-aligned, then the instructions (b) and (d) are invalid. If the memory is word-aligned, then the instructions (a) and (c) are invalid. However, without more information on the specific MSP430 architecture and memory layout, it is not possible to determine the validity of these instructions.
Step by step
Solved in 2 steps
