CS609-Midterm
1 / 50
PPI stands for
2 / 50
Display device (Monitor) performs _________ I/O.
3 / 50
By cascading two DMAs ____ bits can be transferred.
4 / 50
The service _________ is called the keyboard hook service.
5 / 50
Interrupt ______ is used to get or set the time.
6 / 50
The keyboard input character scan code is received at ___ port.
7 / 50
DTE is ___________
8 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
9 / 50
Each paragraph in keep function is ____ bytes in size.
10 / 50
In ____________each byte is needed to be encapsulated in start and end.
11 / 50
Int ________ is used to control the printer via the BIOS.
12 / 50
There are two main types of interrupts, namely
13 / 50
Operating system name contains ____ bytes in boot block.
14 / 50
The Function of I/O controller is to provide ____________.
15 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
16 / 50
The ____________ function simply enables the self test facility within the modem control register
17 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
18 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
19 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
20 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
21 / 50
If CPUID instruction is not present then the processor can be a
22 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
23 / 50
BIOS support _____________UARTS as COM ports.
24 / 50
__________is used to control the printer via the BIOS
25 / 50
Hardware Interrupts are __________.
26 / 50
PPI stands for _____________.
27 / 50
NMI Stand for
28 / 50
The keyboard makes use of interrupt number _______ for its input operations.
29 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
30 / 50
The output on the monitor is controlled by a controller called __________within the PC.
31 / 50
The ______ service # is not used in any interrupt.
32 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
33 / 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);
34 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
35 / 50
BIOS DO NOT support ______.
36 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
37 / 50
UART stands for_______
38 / 50
DSR stands for __________ .
39 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
40 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
41 / 50
Interrupt _____ is empty; we can use its vector as a flag.
42 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
43 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
44 / 50
PPI is used to perform parallel communication
45 / 50
46 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
47 / 50
A single interrupt controller can arbitrate among ____ different devices.
48 / 50
Command register is an _____ bit register
49 / 50
Int 14H____________ can be used to send a byte
50 / 50
_______ is LED control byte.
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