*TUTORIAL 2A- PART D

STRUCTURE

4 TYPES OF

MEMORY

RAMRAM stands for Random Access Memory and is a type of

chip used in in primary storage memory.It is also temporary storage, holding software instructions and

short-term working memory for the processor.Most RAM is volatile that requires electrical power to hold data.The

capacity of RAM is expressed in megabytes or gigabytes and personal computers typically feature between 2 GB

and 128GB of RAM. An area of the hard disk, called virtual memory, can be used if an application runs out of

allocated RAM. Accessing data in memory can be more than 200, 000 times faster than accessing data on hard

disk, Because of the mechanical motion of the hard disk.The access time (speed) of memory contributes to

the overall performance of the computer – in nanosecond.

ROM ROM is a type of memory

circuitry that holds the computer’s startup routine, this is a permanent and non-volatile

memory. The ROM BIOS tells the computer how to access

the hard disk, find the operating system, and load it

into RAM.ROM chips in printers contain data for FONTS.

EEPROM EEPROM Stands for Electrically Erasable

Programmable Read-Only Memory.It is more permanent than RAM, and less permanent than ROM. Requires no power to hold data.Hold their

startup instructions because it allows the computer easily update its contents.

CMOSCMOS is an acronym for complementary

metal oxide semiconductor. In short, CMOS defines the type of material from which the chip is made. CMOS runs on

about a millionth of an amp of electrical current. This efficiency allows it to store

configuration data for a long time (maybe years), powered only from either

low-voltage dry cell or lithium batteries.Nonvolatile storage in

contemporary computers is often in EEPROM or flash memory (like the

BIOS code itself), the remaining usage for the battery is then to keep the real-

time clock (RTC) going. The typical NVRAM capacity is 512 bytes,

which is generally sufficient for all BIOS settings.

4 PRINTER FEATURE

S

Duty Cycle

Print Speed

Resolution

Operating Costs