CS609-Midterm
1 / 50
Hardware Interrupts are __________.
2 / 50
Keyboard Status Byte is located at the address
3 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
4 / 50
The keyboard makes use of interrupt number _______ for its input operations.
5 / 50
Following is not a method of I/O
6 / 50
In self test mode the output of the UART is routed to its input
7 / 50
At IRQ 7 Interrupt # ___ is used.
8 / 50
If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
9 / 50
___________ is used to identify cause of interrupt.
10 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
11 / 50
PPI is used to perform parallel communication
12 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
13 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
14 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
15 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
16 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
17 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
18 / 50
The ____________ function simply enables the self test facility within the modem control register
19 / 50
_______ is LED control byte.
20 / 50
______ is Disk interrupt.
21 / 50
The interval timer can operate in _______ modes.
22 / 50
_____ bit is cleared to indicate the low nibble is being sent.
23 / 50
Counter register can be used to divide clock signal.
24 / 50
DTE is ___________
25 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
26 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
27 / 50
PPI stands for _____________.
28 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
29 / 50
File can be______ viewed as collection of clusters or blocks.
30 / 50
DSR stands for __________ .
31 / 50
Timer interrupt is a _________.
32 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
33 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
34 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
35 / 50
Interrupt service number is usually placed in ____________ register.
36 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
37 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
38 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
39 / 50
The Function of I/O controller is to provide ____________.
40 / 50
_________ is used to identify the cause of interrupt.
41 / 50
In self test mode the output of the UART is routed to its input.
42 / 50
A software interrupt does not require EOI (End of interrupt).
43 / 50
BPB stands for _________.
44 / 50
__________is used to control the printer via the BIOS
45 / 50
Display device (Monitor) performs _________ I/O.
46 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
47 / 50
48 / 50
NMI Stand for
49 / 50
50 / 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);
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