Labels:book | bulletin board | crt screen | earth | poster | reckoner | sky OCR: Chapter Registers and Addressing Modes About this chapter This chapter describes the registers which you can work with and the addressing modes that can be used on operands. Registers There are 18 registers that you should concern yourself with: the 8 data registers, the address registers, the program counter and the status register. They are each 32 bits in size with the exception of the status register, which is 16 bits. They are numl bered with as the right most bit See Figure 1 101 a chart of Fall 18 registers. Whenever long word is referenced, bits are being referenced. With a word sized operand the low order 16 bits are intended The low order bits are paen in byte reference Data Registers The data registers (D0 D7) are each 32 bits wide and are primarily used to hold 32 bit (long (pi ...
