CS609-Midterm
1 / 50
On the execution of IRET instruction, number of bytes popped from stack is
2 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
3 / 50
Keyboard Status Byte is located at the address
4 / 50
DCE is _____________
5 / 50
DTE is ____________.
6 / 50
_______ is LED control byte.
7 / 50
___________ is used to identify cause of interrupt.
8 / 50
_____ bit is cleared to indicate the low nibble is being sent.
9 / 50
If keyboard buffer is empty the head and tail points at the same location.
10 / 50
_________ is used to identify the cause of interrupt.
11 / 50
Counter register can be used to divide clock signal.
12 / 50
Interrupt _____ is empty; we can use its vector as a flag.
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Total No. of bytes that can be stored in Keyboard Buffer is____.
14 / 50
UART stands for_______
15 / 50
Int ________ is used to control the printer via the BIOS.
16 / 50
______ is LED control byte.
17 / 50
Standard PC can have _____ PPI.
18 / 50
------------ is used to set time from RTC
19 / 50
------------ is used to read time from RTC
20 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
21 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
22 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
23 / 50
DSR stands for __________ .
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The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
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PPI stands for
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Operating system name contains ____ bytes in boot block.
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______ is Disk interrupt.
28 / 50
Display device (Monitor) performs _________ I/O.
29 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
30 / 50
Keyboard uses port ____ as status port.
31 / 50
Each paragraph in keep function is ____ bytes in size.
32 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
33 / 50
Maximum number of interrupts in a standard PC is
34 / 50
REGS is a Union
35 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
36 / 50
In ____________each byte is needed to be encapsulated in start and end.
37 / 50
The ____________ function simply enables the self test facility within the modem control register
38 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
39 / 50
------------ is used to read date from RTC
40 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
41 / 50
To distinguish 486 with Pentium CPUID Test is used.
42 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
43 / 50
File can be______ viewed as collection of clusters or blocks.
44 / 50
To store each character in keyboard buffer ____ bytes are required.
45 / 50
File system used in CD’s is_______ file system
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Interrupt 9 usually reads the _________ from keyboard.
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______ is used to set time.
48 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
49 / 50
Which of the following are types of ISR __________.
50 / 50
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