This set of Microprocessor Multiple Choice Questions & Answers (MCQs) focuses on “Machine Language Instruction Formats”.1. Operation code field is present in :
Machine language instruction format has one or more fields. The first one is the operation code field.
A machine language instruction format consists of
Machine language instruction format has both the fields.
The length of the one-byte instruction is
This format is only one byte long.
The instruction format ‘register to register’ has a length of
This format is 2 byte long.
The R/M field in a machine instruction format specifies
The LSBs(least significant bits) from 0 to 3 represent R/M field that specifies another register or memory location i.e. the other operand.
In a machine instruction format, S-bit is the
The S-bit known as sign extension bit is used along with W-bit to show the type of operation.
The bit which is used by the ‘REP’ instruction is
The Z-bit is used by the REP instruction to control the loop.
If W-bit value is ‘1’ then the operand is of
If W-bit is ‘1’ then the operand is of 16-bits, and if it is ‘0’ then the operand is of 8-bits.
The instructions which after execution transfer control to the next instruction in the sequence are called
The sequential control flow instructions follow sequence order in their execution.
The instructions that transfer the control to some predefined address or the address specified in the instruction are called as
The control transfer instructions transfer control to the specified address.