CS609-Midterm
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To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
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Int 14H______ can be used to set the line parameter of the UART or COM port
3 / 50
The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
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If keyboard buffer is empty the head and tail points at the same location.
5 / 50
DTE is ____________.
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By cascading two DMAs ____ bits can be transferred.
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There are two main types of interrupts, namely
8 / 50
REGS is a Union
9 / 50
__________is used to control the printer via the BIOS
10 / 50
_____ bit is cleared to indicate the low nibble is being sent.
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____ No. of bytes are used to store the character in the keyboard buffer.
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Int 14H __________ can be used to set the line parameter of the UART or COM port.
13 / 50
DCE stands for __________.
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The output on the monitor is controlled by a controller called __________within the PC.
15 / 50
Control information in files is maintained using
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18 / 50
Timer interrupt is a _________.
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------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
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DCE is _____________
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The service number is usually placed in the ________ register.
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Bit number _______ of coprocessor control word is the Interrupt Enable Flag.
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PPI stands for
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NMI Stand for
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In self test mode the output of the UART is routed to its input.
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27 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
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Standard PC operates in two modes in terms of memory which are
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PPI stands for _____________.
30 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
31 / 50
In case of synchronous communication a timing signal is required to identify the start and end of a bit.
32 / 50
Interrupt _____ is empty; we can use its vector as a flag.
33 / 50
Int ________ is used to control the printer via the BIOS.
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______ is Disk interrupt.
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_______ is LED control byte.
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There are two type of communication synchronous and Anti Synchronous
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In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
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At IRQ 7 Interrupt # ___ is used.
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___________ is used to identify cause of interrupt.
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The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
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________means typematic rate will be sent in next byte.
42 / 50
Keyboard uses port ____ as status port.
43 / 50
------------ is used to read date from RTC
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45 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
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______ is used to set time.
47 / 50
A software interrupt does not require EOI (End of interrupt).
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49 / 50
In self test mode the output of the UART is routed to its input
50 / 50
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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