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Basic steps used by the processor in instruction processing are?
1.Fetch the most instructions from memory. 2.Read an apparend if required by the instruction.(Apparend is a quantity to be operated as directed by its associated instruction.) 3.Execute the instruction.(Do what the instruction says.) 4.Write the result backe into memory.(If required by instruction.)
List and briefly define the possible states that define an instruction execution?
The possible states that define an instruction execution are as follows: Instruction address calculation - Determine the address of the next instruction to be executed. Instruction fetch - Read instruction from its memory location into the processor. Instruction operation decoding - Analyze instruction to determine type of operation to be performed and operand to be used. Operand address calculation - If the operation involves reference to an operand in memory or available via I/O, then determine the address of the operand. Operand fetch - Fetch the operand from memory or read it in from I/O. Data operation - Perform the operation indicated in the instruction. Operand store - Write the result into memory or out to I/O.
What does 'the instruction at 0x7c3a1bb8 referenced memory at 0x00000004 the memory cold not be read mean?
This is an error within the program code due to compatibility issues.
What is opcode fetch?
The process of transferring instruction codes from memory location to instruction queue register is called opcode fetch.
How do you spell the word rom?
The abbreviation ROM can mean Read Only Memory, a type of computer programming instruction designed to be read and not overwritten.
Difference between LDA and STA instruction in 8085?
In the 8085, the LDA instruction loads the accumulator from memory, while the STA instruction stores the accumulator to memory. LDA is a read, while STA is a write. LDA is opcode 3AH, while STA is opcode 32H.
What is instruction decode and operand fetch?
The opcode fetched from the memory is being decoded for the next steps and moved to the appropriate registers. Fetch operands from memory if necessary: If any operands are memory addresses, initiate memory read cycles to read them into CPU registers.
What is memory interface unit?
While executing a program, the microprocessor needs to access memory frequently to read instruction codes and data stored in memory and the interfacing circuit enables that access.
What is read and write memory called?
ram
The permanent memory built in to Computer is called?
ROM (Read only memory)
What permanent memory that is built in your computer is called?
It is Rom (read only memory)
The process of obtaining a program instruction or data item from memory is called?
Fetching
