The Midterm Solution - Suraj @ LUMS - Lahore University of ...

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i) Consider the following code:mov ax, 0hmov cx, 0AhdoLoop:dec axloop doLoopWhat is the value of the ax register after the completion of the doLoop? [2]The value of the ax register after completion of the loop is:FFF6 hRough WorkPage 14 of 16
Part C [15 marks]26. Which technique frees up the CPU by transferring data directly between the I/O deviceand memory: [1]a. Programmed I/Ob. Interruptsc. I/O Channeld. I/O Registerse. I/O Processorf. DMA27. In which technique, does the CPU issue an I/O command, continues to executesubsequent instructions, and is interrupted by the I/O module when the latter hascompleted its work: [1]a. Programmed I/Ob. Interruptsc. I/O Channeld. I/O Registerse. I/O Processorf. DMA28. When an interrupt occurs, arrange the following operations in their order of occurrence?[3]a) interrupt service routine executedb) the registers are restored by popping their values off of the stackc) the processor identifies the source of the interruptd) the program counter and other registers' values are pushed onto the stacke) the address of the interrupt service routine is placed in the program counterOrder of Occurrence:1. ____c_____2. ____d____3. ____e____4. ____a____5. ____b____PTOPage 15 of 16
Page 1 and 2: Lahore University Of Management Sci
Page 3: S. Masud & T. Jadoon Computer Organ
Page 7 and 8: Initial Contents of Memory in hex:R
Page 9 and 10: OR GateA15A14OR GateA133X8 DecoderA
Page 11 and 12: d) What will be the corresponding t
Page 13: 0002 00 h0003 09 h0004 00 h0005 42

The Midterm Solution - Suraj @ LUMS - Lahore University of ...

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