CS609-Midterm
1 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
2 / 50
Int 14H____________ can be used to send a byte
3 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
4 / 50
Interrupt 9 usually reads the _________ from keyboard.
5 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
6 / 50
Display device (Monitor) performs _________ I/O.
7 / 50
DCE is _____________
8 / 50
DCE stands for __________.
9 / 50
NMI Stand for
10 / 50
Hardware Interrupts are __________.
11 / 50
The interval timer can operate in ____modes.
12 / 50
There are two main types of interrupts, namely
13 / 50
Control information in files is maintained using
14 / 50
On the execution of IRET instruction, number of bytes popped from stack is
15 / 50
In ____________each byte is needed to be encapsulated in start and end.
16 / 50
Standard PC can have _____ PPI.
17 / 50
By cascading two DMAs ____ bits can be transferred.
18 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
19 / 50
Only ________ ports are important from programming point of view.
20 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
21 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
22 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
23 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
24 / 50
Interrupt _____ is empty; we can use its vector as a flag.
25 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
26 / 50
There are two main types of interrupts namely _________________.
27 / 50
Interrupt ______ is used to get or set the time.
28 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
29 / 50
______ is LED control byte.
30 / 50
PPI stands for
31 / 50
32 / 50
The interval timer can operate in _______ modes.
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_______ is LED control byte.
34 / 50
The keyboard makes use of interrupt number _______ for its input operations.
35 / 50
At IRQ 7 Interrupt # ___ is used.
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37 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
38 / 50
In self test mode the output of the UART is routed to its input.
39 / 50
Tail of keyboard should get to get the start of buffer.
40 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
41 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
42 / 50
Int 14H __________ can be used to receive a byte.
43 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
44 / 50
The ______ service # is not used in any interrupt.
45 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
46 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
47 / 50
48 / 50
Maximum number of interrupts in a standard PC is
49 / 50
The Function of I/O controller is to provide ____________.
50 / 50
Register can be used to divide frequency is _________
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