CS609-Midterm
1 / 50
In self test mode the output of the UART is routed to its input
2 / 50
PPI stands for _____________.
3 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
4 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
5 / 50
Display device (Monitor) performs _________ I/O.
6 / 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);
7 / 50
The interval timer can operate in ____modes.
8 / 50
------------ is used to set time from RTC
9 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
10 / 50
LPTs can be swapped.
11 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
12 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
13 / 50
The keyboard makes use of interrupt number _______ for its input operations.
14 / 50
DMA stands for_________
15 / 50
DSR stands for __________ .
16 / 50
_____ bit is cleared to indicate the low nibble is being sent.
17 / 50
18 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
19 / 50
Keyboard uses port ____ as status port.
20 / 50
------------ is used to read date from RTC
21 / 50
______ is used to set time.
22 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
23 / 50
24 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
25 / 50
Hardware Interrupts are __________.
26 / 50
To distinguish 486 with Pentium CPUID Test is used.
27 / 50
28 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
29 / 50
File system used in CD’s is_______ file system
30 / 50
Standard PC operates in two modes in terms of memory which are
31 / 50
In ____________each byte is needed to be encapsulated in start and end.
32 / 50
Int 14H __________ can be used to receive a byte.
33 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
34 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
35 / 50
Interrupt 9 usually reads the _________ from keyboard.
36 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
37 / 50
38 / 50
At IRQ 7 Interrupt # ___ is used.
39 / 50
40 / 50
Which of the following are types of ISR __________.
41 / 50
Interrupt service number is usually placed in ____________ register.
42 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
43 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
44 / 50
The BIOS interrupt ________ can be used to configure RTC.
45 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
46 / 50
47 / 50
The keyboard input character scan code is received at ___ port.
48 / 50
49 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
50 / 50
Interrupt _____ is empty; we can use its vector as a flag.
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