The computers memory
RAM (random access memory)
-used to store program instructions and data temporarily
-unique address and data can be stored in any location
-can be used to retrieve info
-will not remain if power goes off
ROM (read-only memory)
-information stored permanently on a chip
-contains startup instructions and other permanent data
CMOS (complementary metal oxide semiconductor)
-special low energy kind of ram
FLASH memory
-used ofr phones, pagers, portable comps etc
Bases Ports and Peripherals
-Information travels between components on the motherboard through groups of wires called system buses or just buses.
Buses:
-typically have 31 or 46 wires
- connect to storage devices in bays
-connect to expansion slots
-connect to external buses and ports
Slots and ports
-Make it easy to add external devices called peripherals
Inventing the future
New raiser etching technology called extra ultraviolet lithography (EUVL) could reduce chip size and increase performance radically
-Super conductors that transmit electricity without half heat could increase computer speed a hundred fold
-the optical computer transmits information in light waves rather then electrical pulses
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