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describe real and protected modeoperation of real mode interrupt when microprocessor completes executing the current instruction it concludes
assembler directives an assembler directive is a statement to give direction to the assembler to perform the task of assembly process assembler
real time clock a real-time clock keeps the time in real time - ie in hours and minutes software for the real-time clock comprises an interrupt
what is the prominence of rs232-c in serial communication name some application where you see its use rs-232 stands for recommend standard
determine the synchronization of bitsthe synchronization provided by use of start and stop bits an extra bit known as a parity bit may optionally be
define baud rate the rate of data transfer in serial data communication is signified in bps bits per second bps is the rate of transfer of
define the half duplex transmission a half-duplex channel can receive andsend but not at the same time its like a one-lane bridge where two-way
explain the daadaa instruction follows the adc or add instruction to adjust the result into a bcd result daa instruction functions only with the al
what is cmp instructioncomparison instruction cmp is a subtraction that changes only the flag bits destination operand never changes a comparison is
what is neg instruction arithmetic sign inversion or twos complement neg neg instruction twos complements a number which means that arithmetic sign
explain the test instruction test instruction performs the and operation the difference is that and instruction changes the destination operand
what are the blocks of microprocessor based system 1 the memory and io system2 the dos operating system3 the
microprocessor development systemcomputer systems have undergone many changes recently machines that once filled large areas have been reduced to
what is assemblera macro-assembler or assembler normally forms a part of operating system that translates an assembly language program into machine
explain the paging unitpaging mechanism functions with 4k - byte memory pages or with a new extension available to pentium with 4m byte-memory pages
what is branch prediction logic branch prediction logic in pentium pentium microprocessor uses branch prediction logic to decrease the time needed
clarify the operation of iret instruction what memory locations comprise the vector for an int 34 instructioninterrupt return iret instruction is
write 8086 initialisation routine required to program 8255 for mode 1 with port a and port b as output ports and port c as an input port indicate all
what are the different modes in that 8255 programmable peripheral interface ppi can operate 24 io lines in 3-8-bit port groups - a b c a b can
explain about mmx architecture mmx architecture introduces new packed data types data types are eight packed consecutive 8-bit bytes four packed
write a short note on mmx technologymmx multimedia extensions technology adds 57 new instructions to instruction set of the pentium - 4
elucidate in brief the functions of the clock generator chip 82848284 clock generator 8284 is an ancillary component to the microprocessors without
compare memory mapped io with io mapped iomemory mapped io scheme in this scheme there is only one address space address space is stated as all
illustrate 16-bit isa compare it with 8-bit isa bus the only difference between 8 and 16-bit isa bus is that an extra connector is attached
what is the purpose of zero z flag and carry c flagcarry flag holds the carry after addition or the borrow after subtraction carry flag also