CS609-Midterm
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Int 14H __________ can be used to set the line parameter of the UART or COM port.
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Operating system name contains ____ bytes in boot block.
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File system used in CD’s is_______ file system
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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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REGS is a Union
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There are two main types of interrupts namely _________________.
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Only ________ ports are important from programming point of view.
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In self test mode the output of the UART is routed to its input
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Standard PC operates in two modes in terms of memory which are
10 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
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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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Maximum number of interrupts in a standard PC is
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PPI interconnection _______ bits is cleared to indicate low nibble is being sent.
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The interval timer can operate in ____modes.
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DTE is ___________
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The keyboard makes use of interrupt number _______ for its input operations.
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DCE is _____________
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Software based flow control make use of -------- control characters
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Following is not a method of I/O
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Int ________ is used to control the printer via the BIOS.
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The amount of memory above conventional memory (extended memory) can be determined using the service _______.
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Display device (Monitor) performs _________ I/O.
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To access the block within cluster using BIOS services the cluster number should be converted into _____.
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Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
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------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
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There are two main types of interrupts, namely
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Keyboard Status Byte is located at the address
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_______ is LED control byte.
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The ____________ function simply enables the self test facility within the modem control register
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Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
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______ is Disk interrupt.
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The BIOS interrupt ________ can be used to configure RTC.
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------------ is used to read date from RTC
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In self test mode the output of the UART is routed to its input.
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By cascading two DMAs ____ bits can be transferred.
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DSR stands for __________ .
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On the execution of IRET instruction, number of bytes popped from stack is
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If CPUID instruction is not present then the processor can be a
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Interrupt _____ is empty; we can use its vector as a flag.
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Usually interrupt procedures are reentrant procedures especially those interrupt procedure compiled using C language compiler are reentrant.
45 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
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------------ is used to set time from RTC
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Int 14H______ can be used to set the line parameter of the UART or COM port
48 / 50
At IRQ 7 Interrupt # ___ is used.
49 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
50 / 50
Command register is an _____ bit register
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