CS609-Midterm
1 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
2 / 50
File system used in CD’s is_______ file system
3 / 50
______ is LED control byte.
4 / 50
BIOS DO NOT support ______.
5 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
6 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
7 / 50
The keyboard makes use of interrupt number _______ for its input operations.
8 / 50
_____ bit is cleared to indicate the low nibble is being sent.
9 / 50
10 / 50
Interrupt _____ is empty; we can use its vector as a flag.
11 / 50
There are __________ kinds of serial communication.
12 / 50
The ____________ function simply enables the self test facility within the modem control register
13 / 50
Only ________ ports are important from programming point of view.
14 / 50
Int 14H __________ can be used to receive a byte.
15 / 50
__________is used to control the printer via the BIOS
16 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
17 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
18 / 50
19 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
20 / 50
Interrupt service number is usually placed in ____________ register.
21 / 50
______ is Disk interrupt.
22 / 50
------------ is used to read time from RTC
23 / 50
If keyboard buffer is empty the head and tail points at the same location.
24 / 50
______ is used to set time.
25 / 50
If CPUID instruction is not present then the processor can be a
26 / 50
UART stands for_______
27 / 50
Hardware Interrupts are __________.
28 / 50
Counter register can be used to divide clock signal.
29 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
30 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
31 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
32 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
33 / 50
Which of the following are types of ISR __________.
34 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
35 / 50
Display device (Monitor) performs _________ I/O.
36 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
37 / 50
________means typematic rate will be sent in next byte.
38 / 50
LPTs can be swapped.
39 / 50
DTE is ___________
40 / 50
REGS is a Union
41 / 50
Timer interrupt occurs _______ times every second by means of hardware.
42 / 50
------------ is used to read date from RTC
43 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
44 / 50
There are two type of communication synchronous and Anti Synchronous
45 / 50
Keyboard Status Byte is located at the address
46 / 50
Maximum number of interrupts in a standard PC is
47 / 50
At IRQ 7 Interrupt # ___ is used.
48 / 50
Each paragraph in keep function is ____ bytes in size.
49 / 50
Control information in files is maintained using
50 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
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