Feature of 8085 microprocessor (For engineering students )

• It is a 8 bit Microprocessor ( each bit is represented in bits or bytes)
• It is manufactured with N-MOS ( N type Metal Oxide Semiconductor ) technology implemented with 6200 transistor 
• It has 16 bit address line A0-A15 and it can point up to 64 KB memory location.
• It has a 16 bit Program counter
• It has a 16 bit stack pointer 
• It can perform arithmetical and logical operations .
• First 8 bit address bus and 8 bit data bus are multiplexed AD0-AD7 . Data bus is a group of 8 lines  D0-D7.
• It consist 74 instruction sets .
• It provides 1 accumulator , 2 flag register , 6 general purpose register arranged in pairs : BC , DE , HL and 2 special purpose register .
• It provide 5 level interrupts and support external interrupt request .

Disadvantage and Limitation of 8085 Microprocessor  

• The 8085 microprocessor is a 8 bit microprocessor , hence it can perform operation only on two 8 bit numbers 
• The 8085 microprocessor has 16 bit address line and 8 bit data line 
• The 8085 can address maximum memory of 64 KB 
• The 8085 microprocessor cannot perform any operation on ASCII number 
• The 8085 microprocessor cannot perform multiplication and division of numbers.
• The 8085 microprocessor cannot perform multiplication , division , subtraction of BCD numbers.
•  The 8085 microprocessor cannot transfer a data directly one memory to another memory .
• The 8085 microprocessor can only address 256 I/O ports .
• The 8085 microprocessor cannot perform the pipeline instructions .
• The 8085 microprocessor there is no provision to determine whether the result obtained is within the limit of 8/16 bit number.