CS609-Midterm
1 / 50
DSR stands for __________ .
2 / 50
By cascading two DMAs ____ bits can be transferred.
3 / 50
Following is not a method of I/O
4 / 50
Interrupt ______ is used to get or set the time.
5 / 50
DMA stands for_________
6 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
7 / 50
BIOS DO NOT support ______.
8 / 50
Standard PC can have _____ PPI.
9 / 50
_____ bit is cleared to indicate the low nibble is being sent.
10 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
11 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
12 / 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);
13 / 50
File system used in CD’s is_______ file system
14 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
15 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
16 / 50
DTE is ___________
17 / 50
------------ is used to set time from RTC
18 / 50
To distinguish 486 with Pentium CPUID Test is used.
19 / 50
Interrupt service number is usually placed in ____________ register.
20 / 50
The ______ service # is not used in any interrupt.
21 / 50
Hardware Interrupts are __________.
22 / 50
The interval timer can operate in ____modes.
23 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
24 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
25 / 50
_______ is LED control byte.
26 / 50
The keyboard input character scan code is received at ___ port.
27 / 50
A single interrupt controller can arbitrate among ____ different devices.
28 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
29 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
30 / 50
______ is LED control byte.
31 / 50
Register can be used to divide frequency is _________
32 / 50
UART stands for_______
33 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
34 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
35 / 50
The Function of I/O controller is to provide ____________.
36 / 50
The BIOS interrupt ________ can be used to configure RTC.
37 / 50
PPI is used to perform parallel communication
38 / 50
Int 14H____________ can be used to send a byte
39 / 50
Software based flow control make use of -------- control characters
40 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
41 / 50
NMI Stand for
42 / 50
PPI stands for _____________.
43 / 50
Interrupt 9 usually reads the _________ from keyboard.
44 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
45 / 50
46 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
47 / 50
Keyboard Status Byte is located at the address
48 / 50
The keyboard makes use of interrupt number _______ for its input operations.
49 / 50
Standard PC operates in two modes in terms of memory which are
50 / 50
In ____________each byte is needed to be encapsulated in start and end.
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