For example 61 storage technologies dixtrac is able

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Unformatted text preview: a word from the memory bus and stores the bits in the DRAM (Figure 6.8(c)). 6.1. STORAGE TECHNOLOGIES 283 register file %eax ALU main memory 0 x I/O bridge bus interface A A (a) CPU places address on the memory bus. register file %eax ALU main memory 0 x I/O bridge bus interface x A (b) Main memory reads from the bus, retrieves word Ü, and places it on the bus. register file %eax x ALU main memory 0 x I/O bridge bus interface A (c) CPU reads word Ü from the bus, and copies it into register %eax. Figure 6.7: Memory read transaction for a load operation: movl A,%eax. 284 CHAPTER 6. THE MEMORY HIERARCHY register file %eax y ALU main memory 0 A I/O bridge bus interface A (a) CPU places address on the memory bus. Main memory reads it and waits for the data word. register file %eax y ALU main memory 0 A I/O bridge bus interface y (b) CPU places data word Ý on the bus. register file %eax y ALU main memory 0 y I/O bridge bus interface A (c) Main memory reads data word Ý from the bus and stores it at address . Figure 6.8: Memory w...
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