CS609-Midterm
1 / 50
DSR stands for __________ .
2 / 50
In self test mode the output of the UART is routed to its input.
3 / 50
Interrupt service number is usually placed in ____________ register.
4 / 50
Int 14H____________ can be used to send a byte
5 / 50
Display device (Monitor) performs _________ I/O.
6 / 50
To distinguish 486 with Pentium CPUID Test is used.
7 / 50
To store each character in keyboard buffer ____ bytes are required.
8 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
9 / 50
The BIOS interrupt ________ can be used to configure RTC.
10 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
11 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
12 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
13 / 50
If CPUID instruction is not present then the processor can be a
14 / 50
A software interrupt does not require EOI (End of interrupt).
15 / 50
Keyboard uses port ____ as status port.
16 / 50
17 / 50
Keyboard Status Byte is located at the address
18 / 50
Register can be used to divide frequency is _________
19 / 50
Interrupt 9 usually reads the _________ from keyboard.
20 / 50
_____ bit is cleared to indicate the low nibble is being sent.
21 / 50
Following is not a method of I/O
22 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
23 / 50
Hardware Interrupts are __________.
24 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
25 / 50
Operating system name contains ____ bytes in boot block.
26 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
27 / 50
In ____________each byte is needed to be encapsulated in start and end.
28 / 50
______ is LED control byte.
29 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
30 / 50
___________ is used to identify cause of interrupt.
31 / 50
The interval timer can operate in _______ modes.
32 / 50
Maximum number of interrupts in a standard PC is
33 / 50
34 / 50
35 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
36 / 50
On the execution of IRET instruction, number of bytes popped from stack is
37 / 50
If keyboard buffer is empty the head and tail points at the same location.
38 / 50
The keyboard makes use of interrupt number _______ for its input operations.
39 / 50
The keyboard input character scan code is received at ___ port.
40 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
41 / 50
42 / 50
By cascading two DMAs ____ bits can be transferred.
43 / 50
The Function of I/O controller is to provide ____________.
44 / 50
At IRQ 7 Interrupt # ___ is used.
45 / 50
Timer interrupt is a _________.
46 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
47 / 50
48 / 50
PPI stands for
49 / 50
Software based flow control make use of -------- control characters
50 / 50
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