Memory and storage (Jeric Bilita)
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Memory and Storage
Prepared by: Jeric F. Bilita
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What is memory?
-consist of electronic components that store instructions waiting to be executed by the processor, data needed by those instructions and the results of processed data.
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What are items memory holds?
The Operating system
Application Programs
Data processed by Application Program and the resulting information
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Stored Program Concept
-the role of memory as a part of computer storing both data and programs
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-refers to the basic storage unit in memory.
-resides temporarily in a location in memory that has an address.
Bytes (character)
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Types of Memory
-loses its contents when computer’s power is off. -temporary. Ex. ROM
-don’t loose content even if computer’s power is off. -permanent
Ex. RAM
Volatile Nonvolatile
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Ready for RFID?
RFID (Radio Frequency Identification) - it uses a tiny computer chip that is mounted
to a product.
RFID reader -reads identifying information on the memory
chip via radio waves .
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-must be re-energized constantly or they lose their contents.
Types of RAM (Random Access Memory)
Dynamic RAM Static RAM
-no need to be re-energized. -faster and more reliable. -more expensive than any variation of DRAM
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MEMORY MODULE
-a small circuit board where RAM resides.-located on the memory slots on the mother board
SIMM(single inline memory module)DIMM(dual inline memory module)RIMM(rambus inline memory)
Types of Memory Module
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Check your computer documentation to see how much RAM you can add.
Can I add more RAM in my computer?
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Cache (pronounced cash)
-improve computer’s processing time.
Two Types of Cache
a. Memory cache b. Disk cache
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Types Of Memory CacheL1 Cache- built directly in the processor -has small capacity like in PC.L2 Cache-slower than L1 -has larger capacity than L1L3 Cache-a cache on the motherboard that is separate from the processor.
-it coexist with L2.
-helps speed the processes of the computer because it stores frequently used instructions and data.
Memory cache
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ROM(Read Only Memory)
-data stored cannot be modified, hence the name read-only.
-a memory chip storing permanent items.
PROM(programmable read-only memory)
-nonvolatile
-is a blank ROM chip on which a programmer can write permanently using microcode but erasable by EEPROM.
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Flash Memory
-nonvolatile -can be erased electronically and
rewritten -also store data/instruction.
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CMOS (pronounced See-moss)
-stands for Complementary Metal-oxide semiconductor
-provides high speeds and consumes less power.
-uses battery to retain information.
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Memory Access Time
-is the amount of time it takes to read from memory.
10,000,000 operations= 1blink
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Teenk u! ….