CS DI, 7A 78 Control 74LS245 Register A7 A6 As A4 IA IB Dlo Do DIR A Enable Enable Ao FIGURE 14.2 Write instructions to initialize the hypothetical chip (Figure 14.2) as an output buffer.
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- Extend the SRC instruction set by adding the xor command,(op=19), which is similar to the and command, but performs the XORoperation instead of AND. A)Develop the abstract RTN for the xor command. B)Write the concrete RTN and its control signals for the xorinstruction for the 1-bus SRC microarchitecture.(Unfortunately, theSRC ALU does not have the XOR operation as one of its primitives,but only the operations ADD, SUB, AND, OR, SHR, SHL, NEG, NOT, C=B,and INC4).If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the fetch cycle is 40% of the processor cycle time, what memory access speed is required to implement load operations with zero wait states and load operations with two wait states?Question 6 Suppose you have a RISC machine with a 1.6 GHz clock (i.e., the clock ticks 1.6 billion times per second). This particular computer uses an instruction cache, a data cache, an operand fetch unit, and an operand store unit. The instruction set includes simple instructions with the following timings: set reg, immed 2 clock cycle 2 clock cycles 2 clock cycle 4 clock cycles 3 clock cycles loop label add reg, immed add reg, reg load reg, mem Assume that the following code franent is used to sum the element of a numeric array. If the initialization code has already executed (i.e. the SET instructions have already finished execution) how many array elements can be processed in 5 ms? Round your answer to the nearest integer. Recall that 1 ms = 0.001 seconds. Also assume that there are no physical memory limitations, implying that the array can be as large as desired. ri, e r2, MAX_SIZE ;initialize loop counter r3, @list initialize sum set set set initialize array pointer more: load…
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