1.

What are the four General Purpose register ?

Answer»

The AX, BX, CX and DX are the general purpose 16-bit register. 

(i) AX is used as 16-bit accumulator. 

 AX ->AH (For higher 8-bit)

AL (For lower 8-bit)

(ii) BX-> Serve as base register for the computation of memory address. 

(iii) CX-> Used as counter in case of multi-iteration . 

(iv) DX-> used for memory addressing when the data are transferred between i/o port and memory using certain i/o instruction.



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