CS609-Midterm
1 / 50
The keyboard makes use of interrupt number _______ for its input operations.
2 / 50
The service number is usually placed in the ________ register.
3 / 50
_________ is used to identify the cause of interrupt.
4 / 50
DCE is _____________
5 / 50
At IRQ 7 Interrupt # ___ is used.
6 / 50
______ is used to set time.
7 / 50
To store each character in keyboard buffer ____ bytes are required.
8 / 50
File can be______ viewed as collection of clusters or blocks.
9 / 50
Which port is known as Data Port______
10 / 50
On the execution of IRET instruction, number of bytes popped from stack is
11 / 50
To distinguish 486 with Pentium CPUID Test is used.
12 / 50
Int 14H __________ can be used to receive a byte.
13 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
14 / 50
PPI stands for
15 / 50
A software interrupt does not require EOI (End of interrupt).
16 / 50
PPI is used to perform parallel communication
17 / 50
___________ is used to identify cause of interrupt.
18 / 50
Hardware Interrupts are __________.
19 / 50
Register can be used to divide frequency is _________
20 / 50
------------ is used to read date from RTC
21 / 50
In self test mode the output of the UART is routed to its input.
22 / 50
In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
23 / 50
Standard PC operates in two modes in terms of memory which are
24 / 50
Software based flow control make use of -------- control characters
25 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
26 / 50
If keyboard buffer is empty the head and tail points at the same location.
27 / 50
Timer interrupt occurs _______ times every second by means of hardware.
28 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
29 / 50
_____ bit is cleared to indicate the low nibble is being sent.
30 / 50
File system used in CD’s is_______ file system
31 / 50
UART stands for_______
32 / 50
The ____________ function simply enables the self test facility within the modem control register
33 / 50
Control information in files is maintained using
34 / 50
Maximum number of interrupts in a standard PC is
35 / 50
Keyboard Status Byte is located at the address
36 / 50
LPTs can be swapped.
37 / 50
Standard PC can have _____ PPI.
38 / 50
Interrupt _____ is empty; we can use its vector as a flag.
39 / 50
_______ is LED control byte.
40 / 50
41 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
42 / 50
Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
43 / 50
Only ________ ports are important from programming point of view.
44 / 50
The interval timer can operate in ____modes.
45 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
46 / 50
DTE is ___________
47 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
48 / 50
By cascading two DMAs ____ bits can be transferred.
49 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
50 / 50
DMA stands for_________
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