CS609-Midterm
1 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
2 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
3 / 50
DTE is ____________.
4 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
5 / 50
Operating system name contains ____ bytes in boot block.
6 / 50
Interrupt ______ is used to get or set the time.
7 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
8 / 50
The ____________ function simply enables the self test facility within the modem control register
9 / 50
___________ is used to identify cause of interrupt.
10 / 50
The keyboard makes use of interrupt number _______ for its input operations.
11 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
12 / 50
In self test mode the output of the UART is routed to its input.
13 / 50
DCE is _____________
14 / 50
The BIOS interrupt ________ can be used to configure RTC.
15 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
16 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
17 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
18 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
19 / 50
There are two main types of interrupts, namely
20 / 50
The interval timer can operate in ____modes.
21 / 50
22 / 50
NMI Stand for
23 / 50
Interrupt service number is usually placed in ____________ register.
24 / 50
Tail of keyboard should get to get the start of buffer.
25 / 50
Int 14H __________ can be used to receive a byte.
26 / 50
There are two main types of interrupts namely _________________.
27 / 50
Only ________ ports are important from programming point of view.
28 / 50
In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017);
29 / 50
A software interrupt does not require EOI (End of interrupt).
30 / 50
31 / 50
32 / 50
By cascading two DMAs ____ bits can be transferred.
33 / 50
PPI stands for
34 / 50
35 / 50
Int 14H____________ can be used to send a byte
36 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
37 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
38 / 50
Timer interrupt occurs _______ times every second by means of hardware.
39 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
40 / 50
At IRQ 7 Interrupt # ___ is used.
41 / 50
_________ is used to identify the cause of interrupt.
42 / 50
_____ bit is cleared to indicate the low nibble is being sent.
43 / 50
Standard PC operates in two modes in terms of memory which are
44 / 50
Hardware Interrupts are __________.
45 / 50
PPI stands for _____________.
46 / 50
Interrupt _____ is empty; we can use its vector as a flag.
47 / 50
If CPUID instruction is not present then the processor can be a
48 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
49 / 50
50 / 50
Which port is known as Data Port______
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