CS609-Midterm
1 / 50
Int 14H____________ can be used to send a byte
2 / 50
The interval timer can operate in ____modes.
3 / 50
A single interrupt controller can arbitrate among ____ different devices.
4 / 50
Only ________ ports are important from programming point of view.
5 / 50
Keyboard uses port ____ as status port.
6 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
7 / 50
Interrupt _____ is empty; we can use its vector as a flag.
8 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
9 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
10 / 50
Timer interrupt is a _________.
11 / 50
DTE is ____________.
12 / 50
Keyboard Status Byte is located at the address
13 / 50
DSR stands for __________ .
14 / 50
PPI stands for
15 / 50
Which port is known as Data Port______
16 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
17 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
18 / 50
Control information in files is maintained using
19 / 50
______ is used to set time.
20 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
21 / 50
Display device (Monitor) performs _________ I/O.
22 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
23 / 50
BIOS support _____________UARTS as COM ports.
24 / 50
_________ is used to identify the cause of interrupt.
25 / 50
The keyboard makes use of interrupt number _______ for its input operations.
26 / 50
The service _________ is called the keyboard hook service.
27 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
28 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
29 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
30 / 50
On the execution of IRET instruction, number of bytes popped from stack is
31 / 50
REGS is a Union
32 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
33 / 50
NMI Stand for
34 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
35 / 50
DMA stands for_________
36 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
37 / 50
38 / 50
Tail of keyboard should get to get the start of buffer.
39 / 50
40 / 50
In self test mode the output of the UART is routed to its input.
41 / 50
Maximum number of interrupts in a standard PC is
42 / 50
By cascading two DMAs ____ bits can be transferred.
43 / 50
To distinguish 486 with Pentium CPUID Test is used.
44 / 50
Register can be used to divide frequency is _________
45 / 50
___________ is used to identify cause of interrupt.
46 / 50
PPI stands for _____________.
47 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
48 / 50
There are two main types of interrupts namely _________________.
49 / 50
DTE is ___________
50 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
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