CS609-Midterm
1 / 50
The keyboard makes use of interrupt number _______ for its input operations.
2 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
3 / 50
Int 14H____________ can be used to send a byte
4 / 50
Display device (Monitor) performs _________ I/O.
5 / 50
______ is Disk interrupt.
6 / 50
Counter register can be used to divide clock signal.
7 / 50
8 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
9 / 50
------------ is used to read date from RTC
10 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
11 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
12 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
13 / 50
________means typematic rate will be sent in next byte.
14 / 50
DSR stands for __________ .
15 / 50
Interrupt _____ is empty; we can use its vector as a flag.
16 / 50
_____ bit is cleared to indicate the low nibble is being sent.
17 / 50
The interval timer can operate in ____modes.
18 / 50
At IRQ 7 Interrupt # ___ is used.
19 / 50
DTE is ___________
20 / 50
PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
21 / 50
PPI stands for
22 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
23 / 50
Int ________ is used to control the printer via the BIOS.
24 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
25 / 50
------------ is used to set time from RTC
26 / 50
Only ________ ports are important from programming point of view.
27 / 50
Keyboard uses port ____ as status port.
28 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
29 / 50
To store each character in keyboard buffer ____ bytes are required.
30 / 50
PPI is used to perform parallel communication
31 / 50
32 / 50
The service number is usually placed in the ________ register.
33 / 50
In self test mode the output of the UART is routed to its input
34 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
35 / 50
DTE is ____________.
36 / 50
REGS is a Union
37 / 50
In self test mode the output of the UART is routed to its input.
38 / 50
39 / 50
Maximum number of interrupts in a standard PC is
40 / 50
41 / 50
File system used in CD’s is_______ file system
42 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
43 / 50
On the execution of IRET instruction, number of bytes popped from stack is
44 / 50
Interrupt service number is usually placed in ____________ register.
45 / 50
By cascading two DMAs ____ bits can be transferred.
46 / 50
The BIOS interrupt ________ can be used to configure RTC.
47 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
48 / 50
The service _________ is called the keyboard hook service.
49 / 50
File can be______ viewed as collection of clusters or blocks.
50 / 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);
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