CS609-Midterm
1 / 50
Keyboard Status Byte is located at the address
2 / 50
In self test mode the output of the UART is routed to its input.
3 / 50
______ is LED control byte.
4 / 50
The service _________ is called the keyboard hook service.
5 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
6 / 50
Interrupt _____ is empty; we can use its vector as a flag.
7 / 50
The keyboard makes use of interrupt number _______ for its input operations.
8 / 50
_______ is LED control byte.
9 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
10 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
11 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
12 / 50
Standard PC can have _____ PPI.
13 / 50
Display device (Monitor) performs _________ I/O.
14 / 50
PPI stands for _____________.
15 / 50
File system used in CD’s is_______ file system
16 / 50
Interrupt 9 usually reads the _________ from keyboard.
17 / 50
The BIOS interrupt ________ can be used to configure RTC.
18 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
19 / 50
------------ is used to read date from RTC
20 / 50
Register can be used to divide frequency is _________
21 / 50
Interrupt service number is usually placed in ____________ register.
22 / 50
Counter register can be used to divide clock signal.
23 / 50
If keyboard buffer is empty the head and tail points at the same location.
24 / 50
There are two main types of interrupts, namely
25 / 50
Tail of keyboard should get to get the start of buffer.
26 / 50
Standard PC operates in two modes in terms of memory which are
27 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
28 / 50
Following is not a method of I/O
29 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
30 / 50
The ______ service # is not used in any interrupt.
31 / 50
Interrupt ______ is used to get or set the time.
32 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
33 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
34 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
35 / 50
DCE stands for __________.
36 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
37 / 50
REGS is a Union
38 / 50
BPB stands for _________.
39 / 50
By cascading two DMAs ____ bits can be transferred.
40 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
41 / 50
Which port is known as Data Port______
42 / 50
Int 14H____________ can be used to send a byte
43 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
44 / 50
Maximum number of interrupts in a standard PC is
45 / 50
NMI Stand for
46 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
47 / 50
Hardware Interrupts are __________.
48 / 50
The output on the monitor is controlled by a controller called __________within the PC.
49 / 50
File can be______ viewed as collection of clusters or blocks.
50 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
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