→A small program or a routine that when executed services the corresponding interrupting source is called as an Interrupt Service Routine(ISR).
→TRAP is a non-maskable interrupt, having the highest priority among all interrupts.
→By default, it is enabled until it gets acknowledged.
→In case of failure, it executes as ISR and sends the data to backup memory.
→This interrupt transfers the control to the location 0024H.

→JA/JNBE :Jump if above/ Jump if not below or equal
→Description: Jumps to the destination label mentioned in the instruction if the result of previous instruction (generally compare) causes both CF and ZF to have value equal to 0, else no action is taken.

RD-Read: Read signal, when low, indicates the peripherals that the processor is performing a memory or I/O read operation. RD is active low and shows the state for T2, T3, TW of any read cycle. The signal remains tristated during the 'hold acknowledge'.

In the history of computing hardware, computers using
1. Vacuum tubes were called the first generation;
2. Transistors and diodes, the second;
3. Integrated circuits, the third;
4. Microprocessors, the fourth.
5. Whereas previous computer generations had focused on increasing the number of logic elements in a single CPU, the fifth generation, it was widely believed at the time, would instead turn to massive numbers of CPUs for added performance.