CS609-Midterm
1 / 50
Hardware Interrupts are __________.
2 / 50
_____ bit is cleared to indicate the low nibble is being sent.
3 / 50
File system used in CD’s is_______ file system
4 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
5 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
6 / 50
Timer interrupt is a _________.
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8 / 50
DTE is ____________.
9 / 50
PPI stands for _____________.
10 / 50
Command register is an _____ bit register
11 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
12 / 50
______ is Disk interrupt.
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14 / 50
Int 14H __________ can be used to receive a byte.
15 / 50
Standard PC can have _____ PPI.
16 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
17 / 50
In self test mode the output of the UART is routed to its input.
18 / 50
______ is LED control byte.
19 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
20 / 50
The keyboard input character scan code is received at ___ port.
21 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
22 / 50
DSR stands for __________ .
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Display device (Monitor) performs _________ I/O.
24 / 50
The ______ service # is not used in any interrupt.
25 / 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);
26 / 50
DMA stands for_________
27 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
28 / 50
Standard PC operates in two modes in terms of memory which are
29 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
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31 / 50
Register can be used to divide frequency is _________
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DCE is _____________
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The keyboard makes use of interrupt number _______ for its input operations.
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Keyboard uses port ____ as status port.
35 / 50
UART stands for_______
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37 / 50
File can be______ viewed as collection of clusters or blocks.
38 / 50
Software based flow control make use of -------- control characters
39 / 50
In ____________each byte is needed to be encapsulated in start and end.
40 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
41 / 50
There are two main types of interrupts, namely
42 / 50
DTE is ___________
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There are __________ kinds of serial communication.
44 / 50
Counter register can be used to divide clock signal.
45 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
46 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
47 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
48 / 50
49 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
50 / 50
________means typematic rate will be sent in next byte.
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