CS609-Midterm
1 / 50
DSR stands for __________ .
2 / 50
Interrupt ______ is used to get or set the time.
3 / 50
The service _________ is called the keyboard hook service.
4 / 50
The keyboard makes use of interrupt number _______ for its input operations.
5 / 50
Maximum number of interrupts in a standard PC is
6 / 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);
7 / 50
________means typematic rate will be sent in next byte.
8 / 50
The service number is usually placed in the ________ register.
9 / 50
In self test mode the output of the UART is routed to its input.
10 / 50
Standard PC operates in two modes in terms of memory which are
11 / 50
BIOS DO NOT support ______.
12 / 50
The ____________ function simply enables the self test facility within the modem control register
13 / 50
There are two type of communication synchronous and Anti Synchronous
14 / 50
Display device (Monitor) performs _________ I/O.
15 / 50
PPI stands for
16 / 50
17 / 50
To store each character in keyboard buffer ____ bytes are required.
18 / 50
File system used in CD’s is_______ file system
19 / 50
LPTs can be swapped.
20 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
21 / 50
Counter register can be used to divide clock signal.
22 / 50
------------ is used to set time from RTC
23 / 50
Int 14H____________ can be used to send a byte
24 / 50
A software interrupt does not require EOI (End of interrupt).
25 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
26 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
27 / 50
______ is LED control byte.
28 / 50
29 / 50
_____ bit is cleared to indicate the low nibble is being sent.
30 / 50
The interval timer can operate in ____modes.
31 / 50
PPI is used to perform parallel communication
32 / 50
__________is used to control the printer via the BIOS
33 / 50
DTE is ____________.
34 / 50
Int ________ is used to control the printer via the BIOS.
35 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
36 / 50
The Function of I/O controller is to provide ____________.
37 / 50
_________ is used to identify the cause of interrupt.
38 / 50
Tail of keyboard should get to get the start of buffer.
39 / 50
DTE is ___________
40 / 50
In ____________each byte is needed to be encapsulated in start and end.
41 / 50
Hardware Interrupts are __________.
42 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
43 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
44 / 50
On the execution of IRET instruction, number of bytes popped from stack is
45 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
46 / 50
______ is used to set time.
47 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
48 / 50
If keyboard buffer is empty the head and tail points at the same location.
49 / 50
Int 14H __________ can be used to receive a byte.
50 / 50
BIOS support _____________UARTS as COM ports.
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