Memory Mapping In 8086
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Memory Mapping In 8086
This 2kb memory segment maps into the reset location of the 8086/8088 (ffff0h). The memory mapping is used to transfer the logical address space into physical memory but sometimes physical memory is a smaller size. The i/o devices are efficiently mapped into the system memory along with the ram and rom memory.
The memory map of 8086 is shown in fig. Types of memories which are most commonly used to interface with 8085 are ram, rom, and eeprom. The microprocessor can access external memory.
Real mode address space (< 1 mib) when a typical x86 pc boots it will be in real mode, with an active bios.
This 2kb memory segment maps into the reset location of the 8086/8088 (ffff0h). 8085 can access 64kb of external memory. The objectives of memory mapping are (1) to translate from logical to physical address, (2) to aid in memory protection (q.v.), and (3) to enable better management of memory resources. This division is arbitrary but at the same time, a convenient one because the most significant hex digit increases by 1 with each additional block.
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