Hardware Questions

Three Logic Levels are used and they are High, Low, HIgh impedance state. The high and low are normal logic levels & high impedance state is electrical open circuit conditions. Tri-state logic has a third line called enable line.

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.

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

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

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

1.Limitations on the size of data. 

2.Most Microprocessors does not support floating-point operations. 

3.Over heating physically

4. Not bit addressable

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.