CS609-Midterm
1 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
2 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
3 / 50
DTE is ___________
4 / 50
Standard PC can have _____ PPI.
5 / 50
Hardware Interrupts are __________.
6 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
7 / 50
In self test mode the output of the UART is routed to its input.
8 / 50
Int 14H __________ can be used to receive a byte.
9 / 50
File system used in CD’s is_______ file system
10 / 50
Interrupt ______ is used to get or set the time.
11 / 50
Keyboard Status Byte is located at the address
12 / 50
Standard PC operates in two modes in terms of memory which are
13 / 50
_______ is LED control byte.
14 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
15 / 50
Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
16 / 50
17 / 50
The keyboard makes use of interrupt number _______ for its input operations.
18 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
19 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
20 / 50
On the execution of IRET instruction, number of bytes popped from stack is
21 / 50
Only ________ ports are important from programming point of view.
22 / 50
Timer interrupt is a _________.
23 / 50
At IRQ 7 Interrupt # ___ is used.
24 / 50
DSR stands for __________ .
25 / 50
26 / 50
__________is used to control the printer via the BIOS
27 / 50
------------ is used to read date from RTC
28 / 50
The ____________ function simply enables the self test facility within the modem control register
29 / 50
30 / 50
Control information in files is maintained using
31 / 50
______ is used to set time.
32 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
33 / 50
34 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
35 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
36 / 50
The Function of I/O controller is to provide ____________.
37 / 50
PPI is used to perform parallel communication
38 / 50
Following is not a method of I/O
39 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
40 / 50
By cascading two DMAs ____ bits can be transferred.
41 / 50
The interval timer can operate in ____modes.
42 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
43 / 50
44 / 50
Keyboard uses port ____ as status port.
45 / 50
_____ bit is cleared to indicate the low nibble is being sent.
46 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
47 / 50
There are two main types of interrupts, namely
48 / 50
In self test mode the output of the UART is routed to its input
49 / 50
Communication between keyboard and keyboard controller is __________.
50 / 50
The service number is usually placed in the ________ register.
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