The signal M/IO is used to differentiate memory address and IO Address. The 8086 uses 20-bit address to access memory and 16-bit address to access I/O devices. The 8086 can operate on either 8-bit or 16-bit data. Combined the three parameters in brackets determine what is called the effective address, which is simply the offset referenced by the instruction. This example copies a word size value into the register Ax. In general, memory accesses take the form of the following example: MOV ax.
In short Logical Address = Segment : Offset. The combination of segment and offset is referred to as a logical address. Instruction Set: X86-16 package: 40-Pin DIP, 16-bit Arithmetic Logic Unit, 16-bit data bus (8088 has 8-bit data bus) 20-bit address bus. In 8086, bytes at even addresses come in on the low half of the data bus (bit 0-7) and bytes at odd address come in on upper half of the data bus (bits 8-15). The 8086 can read a 16-bit word at an even address in one operation and at an odd address in either case. The least significant byte of a word on an 8086 family microprocessor is at the lower address.Ī memory address on the 8086 consist of two numbers usually written in hexadecimal and separated by colon representing segment and the offset.
Released by Intel in 1978 produced from 1978-1990. How many instructions can be executed per second in 8086/8088?Ģ.5 Millions Instructions can be executes. Which microprocessor accepts the program written for 8086 without any changes? The work on 8086 design started in 1976 and chip was introduced to market in the summer of 1978. 8086 is 16-bit microprocessor designed by Intel which gave rise to X86 architecture. 8086 is one of famous microprocessor architecture. I believe this set of questions with solution will helpful for entry level position/academic interview. Here are some list of Interview Question Answers on 8086 Microprocessor.
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