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Why 8085 microprocesseor cannot have more than 256 instruction?
Wiki User
∙ 12y ago
Intel designed the 8085 as a 8 bit computer, with the opcode byte as the first byte of the instruction. As such, there are only 256 possible values for the first opcode byte. (28 = 256) As implemented, Intel provided only 83 different instructions.
It is possible, however, in general, that secondary opcode space be usable, so the "8 bit" rule might not necessarily apply, but Intel chose to not implement any of them on the 8085, like they did on the 8086/8088.
Wiki User
∙ 12y ago
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Why is 8085 called so?
because 8085 is one of the landmark of 8-bit microprocessor history. it was more simple in construction than 8080. higher bit microprocessor can be understood very easily if one has prior knowledge of 8085.
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different architecture.
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How many machine cycles are required for RET instruction in 8085 microprocessor is?
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How many machine cycles are required for SHLD in 8085?
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Main difference between 8085 and 8086?
The most significant difference between the Intel 8085 and 8086 microprocessors is that the 8085 is an 8-bit system and the 8086 is a 16-bit system. This difference allows the 8086 system to have a much larger set of operational instructions and can make calculations to more significant places. Note: the 8085 processor does have two 16-bit registers. The pointer and the program counter.
What is the difference between instructions and instruction?
instructions means more than 1 instruction (ex.go home and do your homework) but instruction means 1 instruction (ex.do your homework)
What are the applications of microprocesser?
The Intel 8085 was the successor of the 8080, an early 8 bit processor, used most famously in the Altair. (Microsoft wrote Microsoft BASIC for the 8085 Altair). The boom of home computers took off with the Zilog Z80, a compatible processor but had more features. Today the 8085 isn't used much commercially, the 8051 is a more common 8 bit processor for embedded systems. However the 8085 is extremely popular in engineering schools in the Middle East, especially India, as an introductory course to microcomputers.
What are the examples of microprocessors?
E.g. 8085, 8086, 8255, 8051, 6800, 8257, 8251 and many more...
