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8086 Memory Addressing

Table: Selection of proper byte from even and odd memory bank for processing

 

BHE A0 Processing
0 0 Both banks active 16-bit data transfer. 16-bit word transfer on AD15–AD0
0 1 Only high (odd) bank active, One byte transfer on AD15–AD8
1 0 Only low (even) bank active, One byte transfer on AD7–AD0
1 1 No bank active.

 

8-Bit Data from Even Address Bank

 

Even bank memory addressing

8-Bit Data from Odd Address Bank

 

Odd bank memory addressing

 

16-Bit Data Starting from Even Address Bank

 

Odd and even bank memory addressing

 





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