CS609-Midterm
1 / 50
Int_____________ service 0 can be used to set the line parameter of the UART or COM port.
2 / 50
Interrupt service number is usually placed in ____________ register.
3 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
4 / 50
BPB stands for _________.
5 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
6 / 50
PPI stands for
7 / 50
If we use keep (0, 1000) in a TSR program, the memory allocated to it is
8 / 50
If keyboard buffer is empty the head and tail points at the same location.
9 / 50
_____ bit is cleared to indicate the low nibble is being sent.
10 / 50
Maximum number of interrupts in a standard PC is
11 / 50
DSR stands for __________ .
12 / 50
DTE is ____________.
13 / 50
________means typematic rate will be sent in next byte.
14 / 50
The Function of I/O controller is to provide ____________.
15 / 50
------------ is used to read date from RTC
16 / 50
IVT is a table containing ______ byte entries each of which is a far address of an interrupt service routine.
17 / 50
There are two type of communication synchronous and Anti Synchronous
18 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
19 / 50
Display device (Monitor) performs _________ I/O.
20 / 50
File system used in CD’s is_______ file system
21 / 50
DMA stands for_________
22 / 50
Standard PC operates in two modes in terms of memory which are
23 / 50
PPI stands for _____________.
24 / 50
The interval timer can operate in ____modes.
25 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
26 / 50
Register can be used to divide frequency is _________
27 / 50
Counter register can be used to divide clock signal.
28 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
29 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
30 / 50
A single interrupt controller can arbitrate among ____ different devices.
31 / 50
Interrupt 9 usually reads the _________ from keyboard.
32 / 50
To distinguish 486 with Pentium CPUID Test is used.
33 / 50
DCE stands for __________.
34 / 50
35 / 50
The ______ service # is not used in any interrupt.
36 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
37 / 50
38 / 50
39 / 50
Hardware Interrupts are __________.
40 / 50
In ____________each byte is needed to be encapsulated in start and end.
41 / 50
Interrupt _____ is empty; we can use its vector as a flag.
42 / 50
Standard PC can have _____ PPI.
43 / 50
In keyboard status byte bit no. 2 and 3 are used for ctrl and alt keys respectively. which of the following condition is used to check that Ctrl + Alt keys are pressed. Where: unsigned char far * scr = (unsigned char far *)(0x00400017);
44 / 50
__________is used to control the printer via the BIOS
45 / 50
Int ________ is used to control the printer via the BIOS.
46 / 50
47 / 50
A software interrupt does not require EOI (End of interrupt).
48 / 50
REGS is a Union
49 / 50
The BIOS interrupt ________ can be used to configure RTC.
50 / 50
The keyboard makes use of interrupt number _______ for its input operations.
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