CS609-Midterm
1 / 50
The bit ______ of Line control register in UART, if cleared will indicate that DLL is the data register.
2 / 50
BPB stands for _________.
3 / 50
To distinguish 486 with Pentium CPUID Test is used.
4 / 50
The BIOS interrupt ________ can be used to configure RTC.
5 / 50
Int 14H __________ can be used to receive a byte.
6 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
7 / 50
Which port is known as Data Port______
8 / 50
The amount of memory above conventional memory (extended memory) can be determined using the service _______.
9 / 50
If keyboard buffer is empty the head and tail points at the same location.
10 / 50
DTE is ____________.
11 / 50
The keyboard makes use of interrupt number _______ for its input operations.
12 / 50
_____ bit is cleared to indicate the low nibble is being sent.
13 / 50
Maximum number of interrupts in a standard PC is
14 / 50
Display device (Monitor) performs _________ I/O.
15 / 50
___________ is used to identify cause of interrupt.
16 / 50
Interrupt service number is usually placed in ____________ register.
17 / 50
_________ is used to identify the cause of interrupt.
18 / 50
By cascading two DMAs ____ bits can be transferred.
19 / 50
DSR stands for __________ .
20 / 50
DCE is _____________
21 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
22 / 50
Software based flow control make use of -------- control characters
23 / 50
Keyboard uses port ____ as status port.
24 / 50
The ______ service # is not used in any interrupt.
25 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
26 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
27 / 50
______ is Disk interrupt.
28 / 50
REGS is a Union
29 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
30 / 50
The interval timer can operate in ____modes.
31 / 50
NMI Stand for
32 / 50
If printer is _____ then printer sends back the ACK signal to the printer interface
33 / 50
In ____________each byte is needed to be encapsulated in start and end.
34 / 50
__________is used to control the printer via the BIOS
35 / 50
BIOS support _____________UARTS as COM ports.
36 / 50
DCE stands for __________.
37 / 50
________means typematic rate will be sent in next byte.
38 / 50
Only ________ ports are important from programming point of view.
39 / 50
40 / 50
The output on the monitor is controlled by a controller called __________within the PC.
41 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
42 / 50
BIOS DO NOT support ______.
43 / 50
DMA stands for_________
44 / 50
In self test mode the output of the UART is routed to its input
45 / 50
Timer interrupt occurs _______ times every second by means of hardware.
46 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
47 / 50
48 / 50
------------ is used to set time from RTC
49 / 50
50 / 50
At IRQ 7 Interrupt # ___ is used.
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