Hardware Questions

There are three types of buses.

Address bus: This is used to carry the Address to the memory to fetch either Instruction or Data.

Data bus: This is used to carry the Data from the memory.

Control bus: This is used to carry the Control signals like RD/WR, Select etc.

TRAP has the highest priority

there are 2 types of interrupts external and internal. NMI has highest priority among all external interrupts, TRAP has highest priority among all internal interrupts. 

in 8085 the interrupts are classified as Hardware and Software interrupts.

Bus Interface Unit and Execution unit, are the two different functional units in 8086.

The basic expansion card types in A+ Hardware certification are ISA and PCI, ISA these can be used only on XT, AT and ATX boards. The industry now considers ISA obsolate.

Flag is called as Low order rigister & Accumulator is called as High order Rigister.

TRAP, RST7.5, RST6.5, RST5.5, INTR.

Accumulator register, Temporary register, Instruction register, Stack Pointer, Program Counter are the various registers in 8085