Assembly Language Fill in the blanks: (short answers) 1. The binary represent of

Question

Assembly Language

Fill in the blanks: (short answers)

1. The binary represent of decimal number 100 is (---).

2. Register AX can be split into two 8-bit registers which are (---).

3. “DB5” means to define a (---) sized number of 5.

4. The function of RCR instruction is (---).

5. The various functions of INT 21H are selected by the value in the (---) register.

6. The complement represent of the byte-sized signed number -5 is (---).

7. In the “string operation”, SI is used as an offset of the (---) segment.

8. The first IBM PC adopted Intel’s (---) as the main CPU.

9. 8255 has three ports which are (---).

10. 74LS373 can be used to batch the (---) signals from AD0-AD7.

Explanation / Answer

1)1100100

2) each 16-bit general purpose register can be split into two 8-bit registers. Al ah

4)Rotates the bits in the destination to the right "count" times with all data pushed out the right side re-entering on the left. The Carry Flag holds the last bit rotated out.

5) AH register

6)

9)Port A, Port B, Port C.

Port A and port B can be used as 8-bit input/output ports. Port C can be used as an 8-bit input/output port or as two 4-bit input/output ports or to produce handshake signals for ports A and B.

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