CS609-Midterm
1 / 50
The keyboard input character scan code is received at ___ port.
2 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
3 / 50
The interval timer can operate in _______ modes.
4 / 50
Int ________ is used to control the printer via the BIOS.
5 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
6 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
7 / 50
File system used in CD’s is_______ file system
8 / 50
DCE stands for __________.
9 / 50
The service number is usually placed in the ________ register.
10 / 50
Display device (Monitor) performs _________ I/O.
11 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
12 / 50
Standard PC operates in two modes in terms of memory which are
13 / 50
Maximum number of interrupts in a standard PC is
14 / 50
__________is used to control the printer via the BIOS
15 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
16 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
17 / 50
______ is Disk interrupt.
18 / 50
PPI is used to perform parallel communication
19 / 50
BIOS DO NOT support ______.
20 / 50
The interval timer can operate in ____modes.
21 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
22 / 50
On the execution of IRET instruction, number of bytes popped from stack is
23 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
24 / 50
The Function of I/O controller is to provide ____________.
25 / 50
_________ is used to identify the cause of interrupt.
26 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
27 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
28 / 50
______ is used to set time.
29 / 50
The keyboard makes use of interrupt number _______ for its input operations.
30 / 50
By cascading two DMAs ____ bits can be transferred.
31 / 50
Int 14H __________ can be used to receive a byte.
32 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
33 / 50
Interrupt service number is usually placed in ____________ register.
34 / 50
Total No. of bytes that can be stored in Keyboard Buffer is____.
35 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
36 / 50
37 / 50
To store each character in keyboard buffer ____ bytes are required.
38 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
39 / 50
Each paragraph in keep function is ____ bytes in size.
40 / 50
_____ bit is cleared to indicate the low nibble is being sent.
41 / 50
42 / 50
We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
43 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
44 / 50
Which port is known as Data Port______
45 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
46 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
47 / 50
Command register is an _____ bit register
48 / 50
DTE is ____________.
49 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
50 / 50
Software based flow control make use of -------- control characters
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