CS609-Midterm
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The following command “outportb (0x61,inportb(0x61) & 0xFC);” will
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The keyboard input character scan code is received at ___ port.
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Communication between keyboard and keyboard controller is __________.
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Interrupt _____ is empty; we can use its vector as a flag.
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______ is LED control byte.
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In case of synchronous communication a timing signal is required to identify the start and end of a bit.
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Interrupt 9 usually reads the _________ from keyboard.
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BIOS DO NOT support ______.
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The keyboard makes use of interrupt number _______ for its input operations.
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The ____________ function simply enables the self test facility within the modem control register
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A software interrupt does not require EOI (End of interrupt).
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PPI is used to perform parallel communication
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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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Operating system name contains ____ bytes in boot block.
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Interrupt service number is usually placed in ____________ register.
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Int 14H __________ can be used to receive a byte.
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DSR stands for __________ .
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The BIOS interrupt ________ can be used to configure RTC.
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There are two type of communication synchronous and Anti Synchronous
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The ______ service # is not used in any interrupt.
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To distinguish 486 with Pentium CPUID Test is used.
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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
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------------ is used to set time from RTC
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The interval timer can operate in _______ modes.
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Command register is an _____ bit register
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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 Function of I/O controller is to provide ____________.
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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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------------ is used to read date from RTC
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UART stands for_______
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The PPI acts as an interface between the CPU and a parallel ________ .
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Set the Interrupt vector means to change the double word sized interrupt vector within IVT.
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_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
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The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
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There are two main types of interrupts namely _________________.
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Standard PC operates in two modes in terms of memory which are
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Counter register can be used to divide clock signal.
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The service _________ is called the keyboard hook service.
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If printer is _____ then printer sends back the ACK signal to the printer interface
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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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Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
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