CS609-Midterm
1 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
2 / 50
------------ is used to read date from RTC
3 / 50
Communication between keyboard and keyboard controller is __________.
4 / 50
______ is LED control byte.
5 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
6 / 50
DTE is ____________.
7 / 50
There are two type of communication synchronous and Anti Synchronous
8 / 50
A software interrupt does not require EOI (End of interrupt).
9 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
10 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
11 / 50
In self test mode the output of the UART is routed to its input.
12 / 50
Counter register can be used to divide clock signal.
13 / 50
Software based flow control make use of -------- control characters
14 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
15 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
16 / 50
The ____________ function simply enables the self test facility within the modem control register
17 / 50
Which of the following are types of ISR __________.
18 / 50
The Function of I/O controller is to provide ____________.
19 / 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);
20 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
21 / 50
Keyboard uses port ____ as status port.
22 / 50
LPTs can be swapped.
23 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
24 / 50
Display device (Monitor) performs _________ I/O.
25 / 50
Standard PC operates in two modes in terms of memory which are
26 / 50
DSR stands for __________ .
27 / 50
At IRQ 7 Interrupt # ___ is used.
28 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
29 / 50
The ______ service # is not used in any interrupt.
30 / 50
Maximum number of interrupts in a standard PC is
31 / 50
Timer interrupt occurs _______ times every second by means of hardware.
32 / 50
DTE is ___________
33 / 50
Int ________ is used to control the printer via the BIOS.
34 / 50
Int 14H____________ can be used to send a byte
35 / 50
In ____________each byte is needed to be encapsulated in start and end.
36 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
37 / 50
38 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
39 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
40 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
41 / 50
------------ is used to set time from RTC
42 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
43 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
44 / 50
Only ________ ports are important from programming point of view.
45 / 50
File can be______ viewed as collection of clusters or blocks.
46 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
47 / 50
There are two main types of interrupts namely _________________.
48 / 50
Hardware Interrupts are __________.
49 / 50
_______ is LED control byte.
50 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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