Labels:bulletin board OCR: The 8088 Execution Unit The 8088's internal data bus 16 bits wido This is tho data size soen a tho programming intorfaco, sinco operands can equally well be either 8or 16 Bus Interface Unit bits in size Prefetch queue Tho interfaco between the 8088 puc the hardware (the interface from tho BIU to the 8088'38 data bus pins and from the 8088 to memory and devices bue via the PC bus)is 8bits wide. Consequently, byte is the largoat (and only) data size supportod or tranafera to and from momory and other dovicos oxtornal to the 8088 FIGURE 4.2 Internally the 8088 is a 16-bit microprocessor. but exter nally the 8088 is only an 8 bit microprocessor. since sizo largest momor external micre oprocessor
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