CS609-Midterm
1 / 50
___________ is used to identify cause of interrupt.
2 / 50
PPI stands for
3 / 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);
4 / 50
_________ is used to identify the cause of interrupt.
5 / 50
DMA stands for_________
6 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
7 / 50
If keyboard buffer is empty the head and tail points at the same location.
8 / 50
Following is not a method of I/O
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
Standard PC can have _____ PPI.
11 / 50
Register can be used to divide frequency is _________
12 / 50
Maximum number of interrupts in a standard PC is
13 / 50
_____ bit is cleared to indicate the low nibble is being sent.
14 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
15 / 50
Counter register can be used to divide clock signal.
16 / 50
The service number is usually placed in the ________ register.
17 / 50
PPI is used to perform parallel communication
18 / 50
Command register is an _____ bit register
19 / 50
BPB stands for _________.
20 / 50
Timer interrupt is a _________.
21 / 50
DCE is _____________
22 / 50
The ______ service # is not used in any interrupt.
23 / 50
DTE is ____________.
24 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
25 / 50
DSR stands for __________ .
26 / 50
There are two main types of interrupts namely _________________.
27 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
28 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
29 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
30 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
31 / 50
The keyboard makes use of interrupt number _______ for its input operations.
32 / 50
By cascading two DMAs ____ bits can be transferred.
33 / 50
File system used in CD’s is_______ file system
34 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
35 / 50
The Function of I/O controller is to provide ____________.
36 / 50
Software based flow control make use of -------- control characters
37 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
38 / 50
Timer interrupt occurs _______ times every second by means of hardware.
39 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
40 / 50
------------ is used to read date from RTC
41 / 50
Communication between keyboard and keyboard controller is __________.
42 / 50
43 / 50
To store each character in keyboard buffer ____ bytes are required.
44 / 50
Each paragraph in keep function is ____ bytes in size.
45 / 50
BIOS DO NOT support ______.
46 / 50
A single interrupt controller can arbitrate among ____ different devices.
47 / 50
48 / 50
________means typematic rate will be sent in next byte.
49 / 50
At IRQ 7 Interrupt # ___ is used.
50 / 50
There are two main types of interrupts, namely
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