CS609-Midterm
1 / 50
Interrupt _____ is empty; we can use its vector as a flag.
2 / 50
If CPUID instruction is not present then the processor can be a
3 / 50
Display device (Monitor) performs _________ I/O.
4 / 50
In ____________each byte is needed to be encapsulated in start and end.
5 / 50
Only ________ ports are important from programming point of view.
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Total No. of bytes that can be stored in Keyboard Buffer is____.
7 / 50
In self test mode the output of the UART is routed to its input.
8 / 50
Register can be used to divide frequency is _________
9 / 50
PPI stands for
10 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
11 / 50
There are two main types of interrupts, namely
12 / 50
DTE is ____________.
13 / 50
14 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
15 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
16 / 50
The keyboard makes use of interrupt number _______ for its input operations.
17 / 50
_____ bit is cleared to indicate the low nibble is being sent.
18 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
19 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
20 / 50
Which port is known as Data Port______
21 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
22 / 50
Command register is an _____ bit register
23 / 50
Standard PC operates in two modes in terms of memory which are
24 / 50
______ is Disk interrupt.
25 / 50
At IRQ 7 Interrupt # ___ is used.
26 / 50
DSR stands for __________ .
27 / 50
A single interrupt controller can arbitrate among ____ different devices.
28 / 50
DTE is ___________
29 / 50
Maximum number of interrupts in a standard PC is
30 / 50
31 / 50
Software based flow control make use of -------- control characters
32 / 50
BPB stands for _________.
33 / 50
------------ is used to read date from RTC
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_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
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36 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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38 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
39 / 50
There are two main types of interrupts namely _________________.
40 / 50
To store each character in keyboard buffer ____ bytes are required.
41 / 50
Interrupt service number is usually placed in ____________ register.
42 / 50
By cascading two DMAs ____ bits can be transferred.
43 / 50
Keyboard uses port ____ as status port.
44 / 50
REGS is a Union
45 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
46 / 50
DCE is _____________
47 / 50
On the execution of IRET instruction, number of bytes popped from stack is
48 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
49 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
50 / 50
The interval timer can operate in ____modes.
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