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what are loosely coupled systemsin loosely coupled systems every cpu may have its own bus control logic the bus arbitration is handled by an external
what are tightly coupled systems or closely coupled systemsin a tightly coupled systems the microprocessor either coprocessor or independent
what are proceduresprocedures are a group of instructions stored as a separate program in memory and it is known from the main program whenever
what are macrosmacro is a group of instruction the macro assembler makes the code in the program each time where the macro is called macros are
what is interrupt service routineinterrupt means to break the sequence of operation whereas the cpu is executing a program an interrupt breaks the
what are the 8086 interrupt typesdedicated interruptstype 0 divide by zero interrupttype 1 single step interrupttype 2non maskable interrupttype 3
explain publicfor large programs several small modules are linked together in order that the modules link together correctly any variable name or
explain biosthe ibm pc has in its rom a collection of routines each of which performs some particular function such as reading a character from
compare procedure amp macro accessed by call amp ret instruction accessed during assembly with name given during program implementation to macro
describe the process control instructionsstc - it sets the carry flag amp does not affect any other flag clc - it resets the carry flag to zero
what are the two modes of operations present in 8086 i minimum mode or uniprocessor systemii maximum mode or multiprocessor
what is the clock frequency of 8086internal clock frequency 5 mhz 8mhz external clock frequency 15mhz
what are the functions of bus interface unit biu in 8086a get instructions from memoryb get data from memory and io portsc write data to memory and
state the significance of lock signal in 8086if 8086 is working at maximum mode there are multiprocessors are there if the system bus is given to a
how single stepping can be done in 8086by setting the trace flag tf the 8086 goes to single-step mode in this mode after the implementation of every
list the various addressing modes present in 8086there are 12 addressing modes are present in 8086 they area register and immediate addressing
what are the different flag available in status register of 8086there are six flags are present they are af - auxiliary carry flag cf - carry flag
what are the predefined interrupts in 8086the predefined interrupts are division by zero type 0 interrupt single step type 1 interrupt nonmaskable
what is the function of the signal in 8086bhe signal means bus high enable signal the bhe signal is made low when there is some read or write
what is the maximum memory size that can be addressed by 8086in 8086 an memory location is addressed by 20 bit address and the address bus is 20 bit
discuss the function of instruction queue in 8086in 8086 a 6-byte instruction queue is presented at the bus interface unit biu it is used to pre
define pipeliningin 8086 to speedup the implementation of program the instructions fetching and implementation of instructions are overlapped each
what is the purpose of segment registers in 8086there are 4 segment registers present in 8086 they are1 code segment cs register2 data segment ds
define addressing modes of 8085a immediate addressingb register addressingc direct addressingd indirect addressinge implicit
explain signal description of 8085a address busb control and status signalc address latch enabled s1s0 status signalse read write