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data busthe data bus is the group of 8 bit used to carry data there line are bidirectional data can flow in both
port addressthe port address is of 8 bit it is range from 00h to ffh it means there may be total i 256 input ports and
memory addressthe memory address is of 16 bits it ranges from 0000h to fffh 16bits address lines of 8085 microprocessor are
address busthe address bus is the group of 16 lines it is used to carry the address of memory location and addresses of
stack pointer spit is also a 16 bit register and a memory pointer similar to program counter it holds the memory address of
program counter pcit is a 16 bit register it is a memory pointer it stores the memory address of the next byte of the
carry fla registers the size of the accumulator is of 8 bit if after any arithmetical or logical operation 9th bit is
parity flag - registers if after any arithmetical or logical operation if number of the accumulator are even parity
auxiliary carry fla - registers if carry is generated from d3 to d4 in the accumulator after any arithmetical or logical operations
zero flag - registers if the result of any arithmetical or logical operation in the accumulator is zero i e all the bits
addition of binary numbers example add 110010102 -510 and 000001012510solution
representation of negative number as mentioned in chapter 1 in 8085 negative numbers are represented in 2 complement form and
sing flagif d7 bit left most bit of accumulator which some exceptions is 1 as a result of any arithmetical or
general purpose registersregisters b c d e h and l are 8 bit general purpose registers these registers store 8
registersvarious registers shown in figure are discussed below in
architecture of 8085 microprocessorthe 8085 microprocessor is an 8 bit general purpose microprocessor 8 bit processor means it
normal 0 false false false en-in x-none x-none 8085microprocessor architecture
multiprogramming - single processor one users many programs when single processor is used to execute more than one independent
multiprocessing - many processors many users many programs multiprocessing or also called distributed processing system provides
multitasking - single processor many users many tasks in multitasking or also called time sharing systems multi user
4gls fourth generations languagesthese are called non procedural languages may be considered as advanced hll objects oriented
disadvantage - high level languagesacomputational time is more as compared to machine languagesbrequires more memorycrequires the
advantages of high level languages ait is easy to learn write and debug the program written in high level
interpreter- high level languagethe interpreter is a program which translates the high level program into objects
complier-high level language it also translates the whole high level program into object program if it does not have