CS609-Midterm
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PPI stands for _____________.
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If CPUID instruction is not present then the processor can be a
3 / 50
At IRQ 7 Interrupt # ___ is used.
4 / 50
Interrupt 9 usually reads the _________ from keyboard.
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To store each character in keyboard buffer ____ bytes are required.
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To distinguish 486 with Pentium CPUID Test is used.
7 / 50
NMI Stand for
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There are two main types of interrupts, namely
9 / 50
Int 14H______ can be used to set the line parameter of the UART or COM port
10 / 50
Hardware Interrupts are __________.
11 / 50
A software interrupt does not require EOI (End of interrupt).
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Which port is known as Data Port______
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We have set the bit No. 7 of IMR(Interrupt Mask Register) to unmask the Interrupt so that interrupt _____ can occur at ____ line.
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Tail of keyboard should get to get the start of buffer.
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_____ bit is cleared to indicate the low nibble is being sent.
16 / 50
The ______ service # is not used in any interrupt.
17 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
18 / 50
________means typematic rate will be sent in next byte.
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Interrupt _____ is empty; we can use its vector as a flag.
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The ________function initialize the COM port whose number is passed as parameter using BIOS services.
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Following is not a method of I/O
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In ____________each byte is needed to be encapsulated in start and end.
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File system used in CD’s is_______ file system
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In self test mode the output of the UART is routed to its input.
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The output on the monitor is controlled by a controller called __________within the PC.
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If keyboard buffer is empty the head and tail points at the same location.
27 / 50
The service number is usually placed in the ________ register.
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______ is used to set time.
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_______ is LED control byte.
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Display device (Monitor) performs _________ I/O.
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The Function of I/O controller is to provide ____________.
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The interval timer can operate in ____modes.
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Operating system name contains ____ bytes in boot block.
35 / 50
On the execution of IRET instruction, number of bytes popped from stack is
36 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
37 / 50
The ____________ function simply enables the self test facility within the modem control register
38 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
39 / 50
In self test mode the output of the UART is routed to its input
40 / 50
UART stands for_______
41 / 50
LPTs can be swapped.
42 / 50
What will be the value of DL register when we are accessing C drive using undocumented service 21H/32H?
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Communication between keyboard and keyboard controller is __________.
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DCE stands for __________.
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46 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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The -------- function receive a byte and COM port number is passed as parameter using BIOS service
48 / 50
Interrupt service number is usually placed in ____________ register.
49 / 50
------------ is used to set time from RTC
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