Basic Computer Structure P2 Flashcards
(24 cards)
What is a PROM?
A device used to store bits by using fuses
What is an EPROM?
An erasable PROM
What is an EEPROM? (E^2 PROM)?
An Electrically Erased PROM - consists of transistors
What can the ROM be thought of as?
The ROM can be thought of as having an array of registers.
What does each register in the ROM contain?
Each register contains a number of memory cells equal to the word size.
How are the registers in the ROM connected?
Each register is connected to a common data bus.
What is required to place data on the bus in the ROM?
There are two Enable Inputs that have to be both HIGH to place data on the bus.
How is the ROM addressed?
The address code AzAzAAo determines which register in the array is enabled.
How many registers can this ROM access with 4 address lines?
4 address lines allow the ROM to access 16 registers.
Example: 24 = 16
What materials were originally used to construct HDDs?
The HDD was originally constructed using Aluminium disks. Now it is more common to use chromium or glass.
What covers the platter in an HDD?
The platter is covered with a thin layer of a magnetic material on which the data is stored.
How are platters arranged in an HDD?
A number of platters are then stacked together with data being stored on both sides.
What is the function of the drive actuator arm in an HDD?
A drive actuator arm holds the read/write head and allows the head to fly across the platters to the correct memory locations.
How is data organized on an HDD?
The HDD is formatted into tracks and sectors.
What is the structure of tracks in an HDD?
Each track is divided into a number of sectors and each track and sector has a physical address.
What is a CD
A disk constructed out of 3 layers of
What is a CD-RW?
A CD that can be written and read from
3 example of HIGH level programmers
C, C++, Fortran, Pascal
What is a Nybble?
4 bits
What is a Byte?
8 bits
What is a Word?
16 bits
What is a DWord?
32 bits
What is a QWord?
64 bits
What are the 2 types of Words?
Data and Instruction
Data: information to be processed by CPU
Instruction: Contains the operation to be performed and the address of the data to be processed
