CS609-Midterm
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REGS is a Union
2 / 50
PPI stands for _____________.
3 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
4 / 50
Keyboard Status Byte is located at the address
5 / 50
Interrupt _____ is empty; we can use its vector as a flag.
6 / 50
DTE is ___________
7 / 50
LPTs can be swapped.
8 / 50
DCE stands for __________.
9 / 50
File system used in CD’s is_______ file system
10 / 50
Standard PC operates in two modes in terms of memory which are
11 / 50
There are __________ kinds of serial communication.
12 / 50
DTE is ____________.
13 / 50
BIOS support _____________UARTS as COM ports.
14 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
15 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
16 / 50
The Function of I/O controller is to provide ____________.
17 / 50
A single interrupt controller can arbitrate among ____ different devices.
18 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
19 / 50
File can be______ viewed as collection of clusters or blocks.
20 / 50
Hardware Interrupts are __________.
21 / 50
Command register is an _____ bit register
22 / 50
PPI is used to perform parallel communication
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_______ is LED control byte.
24 / 50
Maximum number of interrupts in a standard PC is
25 / 50
26 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
27 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
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
The BIOS interrupt ________ can be used to configure RTC.
30 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
31 / 50
NMI Stand for
32 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
33 / 50
BIOS DO NOT support ______.
34 / 50
The interval timer can operate in ____modes.
35 / 50
The keyboard makes use of interrupt number _______ for its input operations.
36 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
37 / 50
------------ is used to set time from RTC
38 / 50
Only ________ ports are important from programming point of view.
39 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
40 / 50
The output on the monitor is controlled by a controller called __________within the PC.
41 / 50
______ is used to set time.
42 / 50
_____ bit is cleared to indicate the low nibble is being sent.
43 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
44 / 50
UART stands for_______
45 / 50
The interval timer can operate in _______ modes.
46 / 50
The keyboard input character scan code is received at ___ port.
47 / 50
Which of the following are types of ISR __________.
48 / 50
__________is used to control the printer via the BIOS
49 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
50 / 50
Interrupt 9 usually reads the _________ from keyboard.
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