CS609-Midterm
1 / 50
______ is LED control byte.
2 / 50
The BIOS interrupt ________ can be used to configure RTC.
3 / 50
Int ________ is used to control the printer via the BIOS.
4 / 50
Keyboard Status Byte is located at the address
5 / 50
There are two main types of interrupts namely _________________.
6 / 50
_____ bit is cleared to indicate the low nibble is being sent.
7 / 50
If CPUID instruction is not present then the processor can be a
8 / 50
Communication between keyboard and keyboard controller is __________.
9 / 50
There are two type of communication synchronous and Anti Synchronous
10 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
11 / 50
Interrupt 9 usually reads the _________ from keyboard.
12 / 50
Interrupt _____ is empty; we can use its vector as a flag.
13 / 50
Standard PC can have _____ PPI.
14 / 50
Maximum number of interrupts in a standard PC is
15 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
16 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
17 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
18 / 50
Int 14H __________ can be used to receive a byte.
19 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
20 / 50
Standard PC operates in two modes in terms of memory which are
21 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
22 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
23 / 50
At IRQ 7 Interrupt # ___ is used.
24 / 50
The interval timer can operate in ____modes.
25 / 50
File system used in CD’s is_______ file system
26 / 50
27 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
28 / 50
The Function of I/O controller is to provide ____________.
29 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
30 / 50
In self test mode the output of the UART is routed to its input.
31 / 50
Only ________ ports are important from programming point of view.
32 / 50
The ____________ function simply enables the self test facility within the modem control register
33 / 50
______ is Disk interrupt.
34 / 50
DTE is ____________.
35 / 50
________means typematic rate will be sent in next byte.
36 / 50
Which port is known as Data Port______
37 / 50
Keyboard uses port ____ as status port.
38 / 50
Command register is an _____ bit register
39 / 50
DTE is ___________
40 / 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);
41 / 50
Timer interrupt occurs _______ times every second by means of hardware.
42 / 50
To store each character in keyboard buffer ____ bytes are required.
43 / 50
------------ is used to read time from RTC
44 / 50
DMA stands for_________
45 / 50
The keyboard makes use of interrupt number _______ for its input operations.
46 / 50
A software interrupt does not require EOI (End of interrupt).
47 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
48 / 50
49 / 50
50 / 50
Counter register can be used to divide clock signal.
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