Labels:bulletin board | diskette | sky OCR: Execution Unit (EU) Executes instructions but has no direct access to memory or devices FLAGS Memory Memory data requests including instruction bytes Bus Interface Unit (BIU) Performs al mermory O/Ipue accesses 4-byte Prefetches instructions into the pretetch prefetch queue for the EU queue The 8088 FIGURE 3.3 Internally the 8088 consists of two separate processing sections operating in parallel. The execution unit EU contains the general purpose registers, the flags, aad the ALU. and executes instructions while the bus interface unit (BIU) contains the instruction pointer and the seg ment registers, and performs all memory accesses for the EU. The BIU not only performs all reads and writes memory operands but also prefetches the next few it struction bytes from memory during idle times st ...
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