CS609-Midterm
1 / 50
Command register is an _____ bit register
2 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
3 / 50
The keyboard input character scan code is received at ___ port.
4 / 50
_____ bit is cleared to indicate the low nibble is being sent.
5 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
6 / 50
------------ is used to set time from RTC
7 / 50
Timer interrupt occurs _______ times every second by means of hardware.
8 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
9 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
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Int 14H____________ can be used to send a byte
11 / 50
Standard PC can have _____ PPI.
12 / 50
There are two main types of interrupts, namely
13 / 50
DSR stands for __________ .
14 / 50
_________ is used to identify the cause of interrupt.
15 / 50
Interrupt 9 usually reads the _________ from keyboard.
16 / 50
In self test mode the output of the UART is routed to its input.
17 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
18 / 50
19 / 50
Display device (Monitor) performs _________ I/O.
20 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
21 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
22 / 50
A software interrupt does not require EOI (End of interrupt).
23 / 50
______ is used to set time.
24 / 50
Operating system name contains ____ bytes in boot block.
25 / 50
REGS is a Union
26 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
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
------------ is used to read time from RTC
29 / 50
Software based flow control make use of -------- control characters
30 / 50
The ______ service # is not used in any interrupt.
31 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
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33 / 50
Which port is known as Data Port______
34 / 50
Each paragraph in keep function is ____ bytes in size.
35 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
36 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
37 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
38 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
39 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
40 / 50
The output on the monitor is controlled by a controller called __________within the PC.
41 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
42 / 50
In ____________each byte is needed to be encapsulated in start and end.
43 / 50
On the execution of IRET instruction, number of bytes popped from stack is
44 / 50
There are two type of communication synchronous and Anti Synchronous
45 / 50
The keyboard makes use of interrupt number _______ for its input operations.
46 / 50
NMI Stand for
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48 / 50
________means typematic rate will be sent in next byte.
49 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
50 / 50
Counter register can be used to divide clock signal.
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