CS609-Midterm
1 / 50
DMA stands for_________
2 / 50
_____ bit is cleared to indicate the low nibble is being sent.
3 / 50
The interval timer can operate in ____modes.
4 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
5 / 50
LPTs can be swapped.
6 / 50
The ________function initialize the COM port whose number is passed as parameter using BIOS services.
7 / 50
Interrupt service number is usually placed in ____________ register.
8 / 50
________ is a device incorporated into the PC to update time even if the computer is off.
9 / 50
At IRQ 7 Interrupt # ___ is used.
10 / 50
DTE is ____________.
11 / 50
Operating system name contains ____ bytes in boot block.
12 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
13 / 50
Tail of keyboard should get to get the start of buffer.
14 / 50
The -------- function receive a byte and COM port number is passed as parameter using BIOS service
15 / 50
Standard PC operates in two modes in terms of memory which are
16 / 50
By cascading two DMAs ____ bits can be transferred.
17 / 50
18 / 50
DSR stands for __________ .
19 / 50
The service number is usually placed in the ________ register.
20 / 50
Software based flow control make use of -------- control characters
21 / 50
BIOS DO NOT support ______.
22 / 50
In counter register bit no. 3 changes its value between 0 and 1 with in ____clock cycles
23 / 50
______ is LED control byte.
24 / 50
PPI stands for
25 / 50
Only ________ ports are important from programming point of view.
26 / 50
Int ________ is used to control the printer via the BIOS.
27 / 50
Standard PC can have _____ PPI.
28 / 50
PPI stands for _____________.
29 / 50
The BIOS interrupt ________ can be used to configure RTC.
30 / 50
Following is not a method of I/O
31 / 50
BPB stands for _________.
32 / 50
The keyboard makes use of interrupt number _______ for its input operations.
33 / 50
To access the block within cluster using BIOS services the cluster number should be converted into _____.
34 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
35 / 50
36 / 50
The output on the monitor is controlled by a controller called __________within the PC.
37 / 50
38 / 50
Int 14H __________ can be used to set the line parameter of the UART or COM port.
39 / 50
Keyboard uses port ____ as status port.
40 / 50
41 / 50
The BIOS interrupt 0x1AH can be used to configure real time clock
42 / 50
Int 14H____________ can be used to send a byte
43 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
44 / 50
Hardware Interrupts are __________.
45 / 50
------------ is used to set time from RTC
46 / 50
If CPUID instruction is not present then the processor can be a
47 / 50
Display device (Monitor) performs _________ I/O.
48 / 50
______ is used to set time.
49 / 50
To set the interrupt vector means is to change the double word sized interrupt vector within the IVT.
50 / 50
BIOS support _____________UARTS as COM ports.
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