CS609-Midterm
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PPI stands for _____________.
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Keyboard Status Byte is located at the address
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Only ________ ports are important from programming point of view.
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To distinguish 486 with Pentium CPUID Test is used.
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Total No. of bytes that can be stored in Keyboard Buffer is____.
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Keyboard uses port ____ as status port.
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_____ bit is cleared to indicate the low nibble is being sent.
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The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
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A software interrupt does not require EOI (End of interrupt).
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DCE is _____________
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To store each character in keyboard buffer ____ bytes are required.
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File can be______ viewed as collection of clusters or blocks.
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Standard PC operates in two modes in terms of memory which are
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Int 14H______ can be used to set the line parameter of the UART or COM port
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The bit number _______ of the coprocessor control word is the interrupt enable flag.
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_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
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Int 14H____________ can be used to send a byte
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UART stands for_______
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There are two main types of interrupts, namely
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The keyboard makes use of interrupt number _______ for its input operations.
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Timer interrupt is a _________.
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The amount of memory above conventional memory (extended memory) can be determined using the service _______.
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________ is a device incorporated into the PC to update time even if the computer is off.
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In order to produce the sound from PC internal Speaker we have to load the___bit divisor value at the ___port.
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Following is not a method of I/O
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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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DCE stands for __________.
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Display device (Monitor) performs _________ I/O.
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Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
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The -------- function receive a byte and COM port number is passed as parameter using BIOS service
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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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The PPI acts as an interface between the CPU and a parallel ________ .
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------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
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Command register is an _____ bit register
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At IRQ 7 Interrupt # ___ is used.
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------------ is used to read time from RTC
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___________ is used to identify cause of interrupt.
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____ No. of bytes are used to store the character in the keyboard buffer.
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If we want to produce the grave voice from speaker phone then we have to load the ____ divisor values at Port ____.
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Int 14H __________ can be used to receive a byte.
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The BIOS interrupt 0x1AH can be used to configure real time clock
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File system used in CD’s is_______ file system
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The keyboard input character scan code is received at ___ port.
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DSR stands for __________ .
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In self test mode the output of the UART is routed to its input.
50 / 50
Standard PC can have _____ PPI.
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