0
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.
What else can I help you with?
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.
What is cache in 8086?
8086 is a small 4 or 6 byte instruction cache or queue that perfetched a few instructions before they were executed. In addition, the 8086 addressed 1M byte of memory, which is 16 times more than 8085. N.K.Jha narayankumarjha2010@gmail.com
Why does 8086 have more registers and addressing modes than 8085?
different architecture.
What are the application of 8085 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.
Four Ways to clear accumulator of 8085?
The four ways to clear the accumulator in the 8085 are...XRA AMVI A,0SUB ALDA {address of a zero}Answered By:KUNAL SINHARead more: What_are_the_4_ways_to_clear_the_accumulator_in_8085_microprocessors
How many machine cycles are required for RET instruction in 8085 microprocessor is?
RET instruction needs 3 machine cycles. One to fetch and decode the instruction(4 T states), and two more machine cycles(i.e. 2*3=6 T states) to read two bytes from the stack(stack is exterior to microprocessor, stack is in R/W memory, so to exchange data with stack needs machine cycles). Thus, RET instruction needs total 3 machine cycles and 10 T-states.
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.
How many machine cycles are required for SHLD in 8085?
The SHLD instruction in the 8085 requires 6 (opcode, decode, and increment) + 3 (low address fetch) + 3 (high address fetch) + 3 (low, L, store) + 3 (high, H, store) cycles which equals 18 cycles, not including wait states.
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...
What is the difference between Intel core1 and Intel core2?
The Intel 8085 is not even in the same class as the Intel Core 2. The architecture and instruction set is vastly different. The 8085 is an 8 bit machine, running on an 8-bit bus, with at most 64kb of RAM/ROM. The Core 2 is a 32/64 bit machine, running on 32/64/128 bit buses, with potentially more than 4gb of RAM/ROM. This is like comparing an original Volkswagon Beetle with an Indy Car.
