CS609-Midterm
1 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
2 / 50
Which of the following are types of ISR __________.
3 / 50
_________ is used to identify the cause of interrupt.
4 / 50
LPTs can be swapped.
5 / 50
Keyboard Status Byte is located at the address
6 / 50
The Function of I/O controller is to provide ____________.
7 / 50
A software interrupt does not require EOI (End of interrupt).
8 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
9 / 50
Command register is an _____ bit register
10 / 50
By cascading two DMAs ____ bits can be transferred.
11 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
12 / 50
UART stands for_______
13 / 50
DSR stands for __________ .
14 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
15 / 50
There are two main types of interrupts, namely
16 / 50
Only ________ ports are important from programming point of view.
17 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
18 / 50
------------ is used to read time from RTC
19 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
20 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
21 / 50
Maximum number of interrupts in a standard PC is
22 / 50
_____ bit is cleared to indicate the low nibble is being sent.
23 / 50
------------ is used to set time from RTC
24 / 50
Display device (Monitor) performs _________ I/O.
25 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
26 / 50
PPI stands for _____________.
27 / 50
DTE is ____________.
28 / 50
In ____________each byte is needed to be encapsulated in start and end.
29 / 50
Software based flow control make use of -------- control characters
30 / 50
_______ is LED control byte.
31 / 50
Counter register can be used to divide clock signal.
32 / 50
33 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
34 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
35 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
36 / 50
PPI is used to perform parallel communication
37 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
38 / 50
BIOS DO NOT support ______.
39 / 50
Which port is known as Data Port______
40 / 50
BPB stands for _________.
41 / 50
The keyboard input character scan code is received at ___ port.
42 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
43 / 50
Keyboard uses port ____ as status port.
44 / 50
Interrupt service number is usually placed in ____________ register.
45 / 50
______ is Disk interrupt.
46 / 50
If CPUID instruction is not present then the processor can be a
47 / 50
DCE is _____________
48 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
49 / 50
NMI Stand for
50 / 50
BIOS support _____________UARTS as COM ports.
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