CS609-Midterm
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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);
2 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
3 / 50
Keyboard Status Byte is located at the address
4 / 50
______ is LED control byte.
5 / 50
The ____________ function simply enables the self test facility within the modem control register
6 / 50
The Function of I/O controller is to provide ____________.
7 / 50
Timer interrupt is a _________.
8 / 50
Maximum number of interrupts in a standard PC is
9 / 50
Int 14H __________ can be used to receive a byte.
10 / 50
File system used in CD’s is_______ file system
11 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
12 / 50
REGS is a Union
13 / 50
The BIOS interrupt ________ can be used to configure RTC.
14 / 50
Timer interrupt occurs _______ times every second by means of hardware.
15 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
16 / 50
DCE stands for __________.
17 / 50
The service number is usually placed in the ________ register.
18 / 50
Int 14H____________ can be used to send a byte
19 / 50
______ is used to set time.
20 / 50
Tail of keyboard should get to get the start of buffer.
21 / 50
In ____________each byte is needed to be encapsulated in start and end.
22 / 50
Communication between keyboard and keyboard controller is __________.
23 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
24 / 50
Standard PC operates in two modes in terms of memory which are
25 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
26 / 50
Keyboard uses port ____ as status port.
27 / 50
DMA stands for_________
28 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
29 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
30 / 50
------------ is used to read date from RTC
31 / 50
_____ bit is cleared to indicate the low nibble is being sent.
32 / 50
Standard PC can have _____ PPI.
33 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
34 / 50
DTE is ____________.
35 / 50
__________is used to control the printer via the BIOS
36 / 50
BPB stands for _________.
37 / 50
On the execution of IRET instruction, number of bytes popped from stack is
38 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
39 / 50
The interval timer can operate in _______ modes.
40 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
41 / 50
______ is Disk interrupt.
42 / 50
In self test mode the output of the UART is routed to its input.
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44 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
45 / 50
Which of the following are types of ISR __________.
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DSR stands for __________ .
47 / 50
The interval timer can operate in ____modes.
48 / 50
49 / 50
_________ is used to identify the cause of interrupt.
50 / 50
There are two type of communication synchronous and Anti Synchronous
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