CS609-Midterm
1 / 50
Standard PC operates in two modes in terms of memory which are
2 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
3 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
4 / 50
Keyboard Status Byte is located at the address
5 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
6 / 50
LPTs can be swapped.
7 / 50
The output on the monitor is controlled by a controller called __________within the PC.
8 / 50
------------ is used to read date from RTC
9 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
10 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
11 / 50
Interrupt ______ is used to get or set the time.
12 / 50
In self test mode the output of the UART is routed to its input.
13 / 50
------------ is used to read time from RTC
14 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
15 / 50
BPB stands for _________.
16 / 50
Timer interrupt is a _________.
17 / 50
18 / 50
Which of the following are types of ISR __________.
19 / 50
There are two main types of interrupts namely _________________.
20 / 50
Register can be used to divide frequency is _________
21 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
22 / 50
PPI is used to perform parallel communication
23 / 50
_______ is LED control byte.
24 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
25 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
26 / 50
Maximum number of interrupts in a standard PC is
27 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
28 / 50
Communication between keyboard and keyboard controller is __________.
29 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
30 / 50
31 / 50
Display device (Monitor) performs _________ I/O.
32 / 50
To distinguish 486 with Pentium CPUID Test is used.
33 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
34 / 50
File can be______ viewed as collection of clusters or blocks.
35 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
36 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
37 / 50
_________ is used to identify the cause of interrupt.
38 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
39 / 50
The keyboard makes use of interrupt number _______ for its input operations.
40 / 50
__________is used to control the printer via the BIOS
41 / 50
42 / 50
______ is Disk interrupt.
43 / 50
44 / 50
DSR stands for __________ .
45 / 50
Hardware Interrupts are __________.
46 / 50
Only ________ ports are important from programming point of view.
47 / 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);
48 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
49 / 50
If keyboard buffer is empty the head and tail points at the same location.
50 / 50
Software based flow control make use of -------- control characters
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