Microprocessor x86

This debugger command is used in a microprocessor to trace the program that executes the program step by step.

Stack are 16-bit segment registers used to contain data and return addresses of procedures or subroutines.

These are inserted in the program so that debugger can debug the program till that point and can display the output.

This is the active low output signal in 8086 that does not allow other devices to take control over the system bus when it is set to zero.

This unit in 8086 pipelined architecture handles all the data and addresses on the buses for the execution unit.

This output pin in 8279 IC is used to blank the display during digit switching or by a blanking command.

These command words in 8259A microprocessor are used to command 8259A and operate in various interrupt modes.

This operator in x86 and is used to declare the type of a label, variable or memory operand. The operator PTR is prefixed by either BYTE or WORD.

CMC stands for Complement Carry Flag. This instruction in x86 means that the contents of carry flag are toggled to the opposite state and it does not affect any other flag.

LOOPE - LOOP while Equal
This conditional loop in x86 performs jump to the specified label if CX is not equal to zero while an equal condition exists (ZF = 1).

This directive in x86 provides a shortcut in definition of a data segment.

This instruction is encountered by microprocessor at the end of subroutine due to which it returns the control to the main program.

This is a type of address decoding technique in a microcomputer system where a special decoder IC is used to generate chip select signal for each block.

These instructions in 8051 chip are used to transfer data between an internal RAM location and an SFR (Special Function Register) location without going through the accumulator.

This operating mode in 8259A performs a non-specific End Of Interrupt (EOI) operation at the trailing edge of the last INTA (Interrupt Acknowledge) pulse automatically.