CS609-Midterm
1 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
2 / 50
________means typematic rate will be sent in next byte.
3 / 50
___________ is used to identify cause of interrupt.
4 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
5 / 50
_____ bit is cleared to indicate the low nibble is being sent.
6 / 50
Standard PC operates in two modes in terms of memory which are
7 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
8 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
9 / 50
BIOS DO NOT support ______.
10 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
11 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
12 / 50
The keyboard input character scan code is received at ___ port.
13 / 50
DTE is ___________
14 / 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);
15 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
16 / 50
17 / 50
______ is Disk interrupt.
18 / 50
Keyboard uses port ____ as status port.
19 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
20 / 50
Which port is known as Data Port______
21 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
22 / 50
At IRQ 7 Interrupt # ___ is used.
23 / 50
PPI is used to perform parallel communication
24 / 50
------------ is used to read time from RTC
25 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
26 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
27 / 50
There are two main types of interrupts, namely
28 / 50
PPI stands for
29 / 50
There are two type of communication synchronous and Anti Synchronous
30 / 50
Software based flow control make use of -------- control characters
31 / 50
The interval timer can operate in ____modes.
32 / 50
If keyboard buffer is empty the head and tail points at the same location.
33 / 50
UART stands for_______
34 / 50
The service _________ is called the keyboard hook service.
35 / 50
Timer interrupt is a _________.
36 / 50
The service number is usually placed in the ________ register.
37 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
38 / 50
------------ is used to set time from RTC
39 / 50
The keyboard makes use of interrupt number _______ for its input operations.
40 / 50
Control information in files is maintained using
41 / 50
Int 14H____________ can be used to send a byte
42 / 50
DCE is _____________
43 / 50
BPB stands for _________.
44 / 50
DSR stands for __________ .
45 / 50
__________is used to control the printer via the BIOS
46 / 50
The Function of I/O controller is to provide ____________.
47 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
48 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
49 / 50
File system used in CD’s is_______ file system
50 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
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