Let us consider a memory that includes two instructions. First instruction is located at memory address 045 that includes an address mode bit 0, an operation code 101, an address 160. Th second instruction is located at the end of a subroutine that includes an address mode bit 1, a operation code 100, an address 160. The subroutine starts at memory location 161 and the conten of PC is equal to 046. ) Draw two block diagrams of the memory to represent the status of the above instruction before and after execution phase; ) List the instructions mentioned above and state the relationship between them. Hints: You can refer Table 1. Table 1: Basic Computer Instructions Hexadecimal code Symbol I-0 1-1 Description AND memory word to AC Add memory word to AC Axx Load memory word to AC Store content of AC in memory Branch unconditionally Branch and save return address Increment and skip if sero AND ADD LDA STA BUN BSA ISZ lxx x Sxx Dx Exxx CLA 7800 Clear AC
Let us consider a memory that includes two instructions. First instruction is located at memory address 045 that includes an address mode bit 0, an operation code 101, an address 160. Th second instruction is located at the end of a subroutine that includes an address mode bit 1, a operation code 100, an address 160. The subroutine starts at memory location 161 and the conten of PC is equal to 046. ) Draw two block diagrams of the memory to represent the status of the above instruction before and after execution phase; ) List the instructions mentioned above and state the relationship between them. Hints: You can refer Table 1. Table 1: Basic Computer Instructions Hexadecimal code Symbol I-0 1-1 Description AND memory word to AC Add memory word to AC Axx Load memory word to AC Store content of AC in memory Branch unconditionally Branch and save return address Increment and skip if sero AND ADD LDA STA BUN BSA ISZ lxx x Sxx Dx Exxx CLA 7800 Clear AC
Chapter4: Processor Technology And Architecture
Section: Chapter Questions
Problem 2PE: If a microprocessor has a cycle time of 0.5 nanoseconds, what’s the processor clock rate? If the...
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