4. Memory and Addressing Modes The state of the CPU and memory is represented by this diagram. Register Value Memory Memory Address Value $20 $05 ... .. $0011 $80 Y $30 PC $FO00 $0010 $00 S $01E0 $000F $OD $00E $30 Flag (P) NV 1 BDIZC 001000 1 1 $000D $20 Value ... a) Value of A after execution of LDA #SOD? b) Value of A after execution of LDA #SOF? c) Value of Y after execution of LDY $OD? d) Value of Y after LDY $(000F), X? e) Value of Y after LDY (SOF), x2| please show workings!

4. Memory and Addressing Modes The state of the CPU and memory is represented by this diagram. Register Value Memory Memory Address Value $20 $05 ... .. $0011 $80 Y $30 PC $FO00 $0010 $00 S $01E0 $000F $OD $00E $30 Flag (P) NV 1 BDIZC 001000 1 1 $000D $20 Value ... a) Value of A after execution of LDA #SOD? b) Value of A after execution of LDA #SOF? c) Value of Y after execution of LDY $OD? d) Value of Y after LDY $(000F), X? e) Value of Y after LDY (SOF), x2| please show workings!

Systems Architecture

7th Edition

ISBN:9781305080195

Author:Stephen D. Burd

Publisher:Stephen D. Burd

Chapter11: Operating Systems

Section: Chapter Questions

Problem 29VE

See similar textbooks

Similar questions

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?
In the ________, memory addresses consist of a single integer.
A(n) __________ is a storage location implemented in the CPU.
A(n) ________________ instruction always alters the instruction execution sequence. A(n) ______________ instruction alters the instruction execution sequence only if a specified Condition is true.
Identify the three elements of a CPU and describe the role of each.
In a CPU, _______ arithmetic generally is easier to implement than _______ arithmetic because of a simpler data coding scheme and data manipulation circuitry.
The major components of a CPU are the __________, __________, and __________.
Microprocessors Fundamentals ENT 237 Homework 1 Problem4: A microcomputer has the following memory map: I/O 4100 to 410F 2100 to 22FF RAM 0000 to OFFF ROM Determine the amount of ROM and RAM memory - in Kbytes - and the number of I/O ports.
A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word ofmemory.a. How many bits are needed for the opcode?b. How many bits are left for the address part of the instruction?c. What is the maximum allowable size for memory?d. What is the largest unsigned binary number that can be accommodated in one word of memory?
Assume a CPU with a fixed 32-bit instruction length has the following instruction format:opcode mode [operand1] [operand2] [operand3]The mode encodes the number of operands and each operand’s mode. For instance, one mode indicates three registers, another indicates two registers and an immediate datum, another indicates a main memory reference, etc. Assume there are 94 instructions and 22 modes. Answer the following.a. One mode indicates three registers. How many registers can be referenced in this mode?b. One mode indicates two registers and an immediate datum in two’s complement. Assuming there are 32 registers, what is the largest immediate datum that can be referenced?c. One mode has a destination register and a source memory address (an unsignednumber). Assuming 16 registers, what is the largest memory reference available?d. One mode has two memory addresses, both using base displacement. In both, the basesare stored in index registers and the displacements are specified in the…
2. Computer designers have invented many variations to the basic form of microcode. For example, the CPU hardware implements the fetch-execute cycle and invokes a microcode procedure for each instruction. What is the advantage and disadvantages of microcode?
A digital computer has a memory unit with 24 bits per word. The instruction set consists of 150 different operations. All instructions have an operation code part (opcode) and an address part (allowing for only one address). Each instruction is stored in one word of memory.Q.) What is the maximum allowable size for memory?