CS609-Midterm
1 / 50
______ is used to set time.
2 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
3 / 50
BIOS DO NOT support ______.
4 / 50
BPB stands for _________.
5 / 50
BIOS support _____________UARTS as COM ports.
6 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
7 / 50
A single interrupt controller can arbitrate among ____ different devices.
8 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
9 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
10 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
11 / 50
NMI Stand for
12 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
13 / 50
The ____________ function simply enables the self test facility within the modem control register
14 / 50
Interrupt service number is usually placed in ____________ register.
15 / 50
Interrupt ______ is used to get or set the time.
16 / 50
Maximum number of interrupts in a standard PC is
17 / 50
_______ is LED control byte.
18 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
19 / 50
Standard PC operates in two modes in terms of memory which are
20 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
21 / 50
Which of the following are types of ISR __________.
22 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
23 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
24 / 50
The service _________ is called the keyboard hook service.
25 / 50
REGS is a Union
26 / 50
If keyboard buffer is empty the head and tail points at the same location.
27 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
28 / 50
Timer interrupt occurs _______ times every second by means of hardware.
29 / 50
To distinguish 486 with Pentium CPUID Test is used.
30 / 50
DTE is ____________.
31 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
32 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
33 / 50
DMA stands for_________
34 / 50
Hardware Interrupts are __________.
35 / 50
In self test mode the output of the UART is routed to its input
36 / 50
The interval timer can operate in _______ modes.
37 / 50
The interval timer can operate in ____modes.
38 / 50
PPI stands for
39 / 50
The keyboard makes use of interrupt number _______ for its input operations.
40 / 50
------------ is used to read time from RTC
41 / 50
42 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
43 / 50
There are two main types of interrupts, namely
44 / 50
____whenever received indicates the start of communication and ______ whenever received indicates a temporary pause in the communication.
45 / 50
File system used in CD’s is_______ file system
46 / 50
Standard PC can have _____ PPI.
47 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
48 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
49 / 50
The keyboard input character scan code is received at ___ port.
50 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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