CS609-Midterm
1 / 50
DSR stands for __________ .
2 / 50
Command register is an _____ bit register
3 / 50
If CPUID instruction is not present then the processor can be a
4 / 50
The bit number _______ of the coprocessor control word is the interrupt enable flag.
5 / 50
REGS is a Union
6 / 50
There are two main types of interrupts, namely
7 / 50
Maximum number of interrupts in a standard PC is
8 / 50
There are two type of communication synchronous and Anti Synchronous
9 / 50
Each paragraph in keep function is ____ bytes in size.
10 / 50
_______ is LED control byte.
11 / 50
The interval timer can operate in ____modes.
12 / 50
To distinguish 486 with Pentium CPUID Test is used.
13 / 50
The output on the monitor is controlled by a controller called __________within the PC.
14 / 50
In self test mode the output of the UART is routed to its input
15 / 50
PPI stands for
16 / 50
Interrupt Vector Table (IVT) in short is a _______ bytes sized table.
17 / 50
Hardware Interrupts are __________.
18 / 50
The keyboard makes use of interrupt number _______ for its input operations.
19 / 50
The following command “outportb (0x61,inportb(0x61) | 3);” will ________ .
20 / 50
The PPI acts as an interface between the CPU and a parallel ________ .
21 / 50
22 / 50
DTE is ___________
23 / 50
File can be______ viewed as collection of clusters or blocks.
24 / 50
By cascading two DMAs ____ bits can be transferred.
25 / 50
_________ used to determine the amount of conventional memory interfaced with the processor in kilobytes.
26 / 50
An I/O device cannot be directly connected to the busses so controller is placed between CPU and I/O.
27 / 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);
28 / 50
29 / 50
The microprocessor package has many signals for data. Below are some in Correct priority order (Higher to Lower).
30 / 50
The________ function uses the COM port number to receive a byte from the COM port using BIOS services.
31 / 50
_________ is used to identify the cause of interrupt.
32 / 50
BPB stands for _________.
33 / 50
UART stands for_______
34 / 50
Timer interrupt occurs _______ times every second by means of hardware.
35 / 50
______ is used to set time.
36 / 50
File system used in CD’s is_______ file system
37 / 50
38 / 50
Standard PC operates in two modes in terms of memory which are
39 / 50
DTE is ____________.
40 / 50
41 / 50
42 / 50
______ is Disk interrupt.
43 / 50
____ No. of bytes are used to store the character in the keyboard buffer.
44 / 50
_____ bit is cleared to indicate the low nibble is being sent.
45 / 50
If keyboard buffer is empty the head and tail points at the same location.
46 / 50
47 / 50
______ is LED control byte.
48 / 50
Int ________ is used to control the printer via the BIOS.
49 / 50
------------ is used to read time from RTC
50 / 50
------------ whenever receive indicates the start of communication ……….. whenever receive indicates the end of communication
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