Consider a hypothetical computer with an instruction set of only two n-bit instruc- tions.The first bit...
Consider a hypothetical computer with an instruction set of only two n-but instructions. The first bit specifies the opcode, and the remaining bits specify one of the 2-1 n-bit words of main memory. The two instructions are as follows: SUBS X: Subtract the contents of location X from the accumulator, and store the result in location X and the accumulator JUMP X: Place address X in Program Counter A word in memory may contain either an instruction or a binary...
[20 pts] 5- Consider the following hypothetical 1-address assembly instruction called "Store Accumulator Indirect with Post-increment" of the form STA (x)- : M(M(x)) ← AC, M(x) ← M(x)+1 Suppose we want to implement this instruction on the pseudo-CPU discussed in class augmented with a temporary register TEMP. An instruction consists of 16 bits: A 4-bit opcode and a 12-bit address. All operands are 16 bits. PC and MAR each contain 12 bits. AC, MDR, and TEMP each contain 16 bits,...
pls both ans Question 20 5 pts Suppose a computer has 32-bit instructions. The instruction set consists of 64 different operations. All instructions have an opcode and two address fields (allowing for two addresses). The first of these addresses must be a register direct address, and the second must be a memory address. Expanding opcodes are not used. The machine has 16 registers. How many bits can be used for the memory address? Question 21 5 pts Suppose we have...
1.) a.) Using the simplified instruction set shown for part b, write code for the following. Suppose memory locations 1400 to 1449 contain 16-bit words. Each word represents 2 ASCII characters. Write code to read in and write out these 100 characters. Left-side character from location 1400 should be first, right-side character from location 1400 should be second, and remaining characters follow in numeric order. Assume you have access to 4 registers: R1, R2, R3, R4. Each register holds one...
Suppose a computer has 20-bit instructions. The instruction set consists of 32 different operations. All instructions have an opcode and two address fields (allowing for two addresses). The frst of these addresses must be a register, and the second must be memory. Expanding opcodes are not used. The machine has 16 registers. What is the maximum allowable size for memory? o 2 K byte O 14K byte O 11 K byte Next » ous Suppose a computer has 20-bit instructions....
The AVR provides a rich instruction set to support high-level languages. The AVR address- ing modes also simplify the access of complex data structures. The AVR has a version of the ADD instruction that includes the C flag as one of the source operands, which enables multiple- precision addition operation. The AVR also has a version of the SUB instruction that includes the C flag as one of source operands and hence is used to perform multiprecision subtraction operation. The...
The hypothetical machine of Figure 3.4 has two I/O instructions: 0011 = Load AC from I/O 0111 = Store AC to I/O In these cases, the 12-bit address identifies a particular I/O device. Show the program execution (using the format of Figure 3.5) for the following program: 1. Load AC from device 5. 2. Add contents of memory location 940. 3. Store AC to device 6. Assume that the next value retrieved from device 5 is 3 and that location...
5 Exercises Now that everything is working you can try the following exercises. To complete them you will need to refer to the documentation in Appendix A- The MiteASM Assembler and Appendix B - The MiteFPGA Processor. Write an assembly language program for an over counter for a cricket umpire. This should display a count on the 7-segment display. The count should increase by 1 when button 0 is 1. pressed. It should reset to 0 when button 1 is...
There is an example below Now that everything is working you can try the following exercises. To complete them you will need to refer to the documentation in Appendix A The MiteASM Assembler and Appendix B The MiteFPGA Processor. Write an assembly language program for an over counter for a cricket umpire. This should 1. display a count on the 7-segment display. The count should increase by 1 when button 0 is pressed. It should reset to 0 when button...