MICROPROCESSOR AND MICROCONTROLLER

Detailed explanation-1: -8086 Microprocessor is an enhanced version of 8085Microprocessor that was designed by Intel in 1976. It is a 16-bit Microprocessor having 20 address lines and16 data lines that provides up to 1MB storage.

Detailed explanation-2: -➢ The 8086 architecture uses the concept of segmented memory. 8086 able to address a memory capacity of 1 megabyte and it is byte organized. This 1-megabyte memory is divided into 16 logical segments. Each segment contains 64 Kbytes of memory.

Detailed explanation-3: -Physical memory is the memory space which CPU address lines can seek directly. For example, 8086 only has 20 address lines, thus, the addressing space is 1MB.

Detailed explanation-4: -It is said that 8086 Microprocessor has 1MB Memory and 20-bit address, 16-bit data bus .

Detailed explanation-5: -Hence 8086 uses memory segmentation. It treats the 1 Mbyte of memory as divided into segments, with a maximum size of a segment as 64 Kbytes. Thus any location within the segment can be accessed using 16 bits. The 8086 Internal Architecture allows only four active segments at a time, as shown in the Fig.