CS609-Midterm
1 / 50
Counter register can be used to divide clock signal.
2 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
3 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
4 / 50
In self test mode the output of the UART is routed to its input
5 / 50
Which port is known as Data Port______
6 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
7 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
8 / 50
------------ is used to read date from RTC
9 / 50
Keyboard uses port ____ as status port.
10 / 50
PPI stands for
11 / 50
A software interrupt does not require EOI (End of interrupt).
12 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
13 / 50
Hardware Interrupts are __________.
14 / 50
Interrupt ______ is used to get or set the time.
15 / 50
Only ________ ports are important from programming point of view.
16 / 50
The keyboard makes use of interrupt number _______ for its input operations.
17 / 50
The interval timer can operate in ____modes.
18 / 50
19 / 50
The Function of I/O controller is to provide ____________.
20 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
21 / 50
------------ is used to set time from RTC
22 / 50
The output on the monitor is controlled by a controller called __________within the PC.
23 / 50
There are __________ kinds of serial communication.
24 / 50
REGS is a Union
25 / 50
Int ________ is used to control the printer via the BIOS.
26 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
27 / 50
_______ is LED control byte.
28 / 50
The keyboard input character scan code is received at ___ port.
29 / 50
Control information in files is maintained using
30 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
31 / 50
DCE stands for __________.
32 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
33 / 50
NMI Stand for
34 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
35 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
36 / 50
Display device (Monitor) performs _________ I/O.
37 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
38 / 50
_________ is used to identify the cause of interrupt.
39 / 50
LPTs can be swapped.
40 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
41 / 50
Tail of keyboard should get to get the start of buffer.
42 / 50
Which of the following are types of ISR __________.
43 / 50
44 / 50
Int 14H __________ can be used to receive a byte.
45 / 50
PPI is used to perform parallel communication
46 / 50
Interrupt _____ is empty; we can use its vector as a flag.
47 / 50
______ is LED control byte.
48 / 50
Keyboard Status Byte is located at the address
49 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
50 / 50
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