CS609-Midterm
1 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
2 / 50
File system used in CD’s is_______ file system
3 / 50
Hardware Interrupts are __________.
4 / 50
Timer interrupt is a _________.
5 / 50
PPI is used to perform parallel communication
6 / 50
LPTs can be swapped.
7 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
8 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
9 / 50
BPB stands for _________.
10 / 50
The ______ service # is not used in any interrupt.
11 / 50
Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
12 / 50
By cascading two DMAs ____ bits can be transferred.
13 / 50
In ____________each byte is needed to be encapsulated in start and end.
14 / 50
A software interrupt does not require EOI (End of interrupt).
15 / 50
Keyboard Status Byte is located at the address
16 / 50
DTE is ____________.
17 / 50
Interrupt ______ is used to get or set the time.
18 / 50
Maximum number of interrupts in a standard PC is
19 / 50
DCE is _____________
20 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
21 / 50
The ____________ function simply enables the self test facility within the modem control register
22 / 50
The keyboard makes use of interrupt number _______ for its input operations.
23 / 50
In self test mode the output of the UART is routed to its input.
24 / 50
______ is LED control byte.
25 / 50
Interrupt service number is usually placed in ____________ register.
26 / 50
The service number is usually placed in the ________ register.
27 / 50
___________ is used to identify cause of interrupt.
28 / 50
In self test mode the output of the UART is routed to its input
29 / 50
Interrupt _____ is empty; we can use its vector as a flag.
30 / 50
REGS is a Union
31 / 50
------------ is used to read date from RTC
32 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
33 / 50
At IRQ 7 Interrupt # ___ is used.
34 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
35 / 50
On the execution of IRET instruction, number of bytes popped from stack is
36 / 50
Int ________ is used to control the printer via the BIOS.
37 / 50
BIOS DO NOT support ______.
38 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
39 / 50
________means typematic rate will be sent in next byte.
40 / 50
Interrupt 9 usually reads the _________ from keyboard.
41 / 50
The keyboard input character scan code is received at ___ port.
42 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
43 / 50
44 / 50
------------ is used to set time from RTC
45 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
46 / 50
Operating system name contains ____ bytes in boot block.
47 / 50
NMI Stand for
48 / 50
49 / 50
______ is Disk interrupt.
50 / 50
------------ is used to read time from RTC
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