ECE 391 Lecture 2: OpCodes and Instructions
9 Mar 2017
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Operate instructions data movement instructions conditional codes control flow instructions. Use % as a prefix for a registers in assembly. Other registers: floating-point, mmx, etc. (not discussed in this class) We won"t be using floating-point instructions in this class? (i think that"s what he said) He also said we aren"t going to be covering mmx. Microprocessor addresses a maximum of 2^n different memory locations, where n is a number of bits on the address bus. As you proceed down the memory, larger address going down, the eax register, which has 4 bytes, the first address represents the first least significant byte of eax, 0x78 0x56 0x34 0x12 little-endian (little end first) x86 uses this approach. This approach is the least significant byte of the register is the lower end of address and the most significant byte of. Ece 391 - lect page 1 has 4 bytes, the first address represents the first least significant byte of eax,
