[PDF] Intel 8086 MICROPROCESSOR ARCHITECTURE





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22Memory Address Generation

Physical Address (20 Bits)AdderSegment Register (16 bits)0 0 0 0Offset Value (16 bits) 23

24•The following examples shows the CS:IP scheme of

address formation:

Inserting a hexadecimal 0H (0000B)

with the CSR or shifting the CSR four binary digits left

3 4 B A 0 ( C S ) +

8 A B 4 ( I P )

3 D 6 5 4 (next address)34BA8AB4CSIP

34BA0
3D654

44B9FCode segment

8AB4 (offset)

25Segment and Address register

combination •CS:IP •SS:SPSS:BP •DS:BXDS:SI •DS:DI (for other than string operations) •ES:DI (for string operations)

26Summary of Registers & Pipeline of 8086 µP

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SIDIFetch &

store code bytes in

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27
quotesdbs_dbs22.pdfusesText_28

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