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(), (), -, CMOS.
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RAM (Random Access Memory), . . . , , (.. ). .
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, . , ? , ( ). ( ) . , , . . , 512, 1024, 1,00 .
BIOS, .., , . . ROM- Read Only Memory . . , ROM- , . , . ( ) ( ). , ( ).
, .. . .
, BIOS PC/XT 8 , 128 2 . , . -, , (EEPROM (Electrically Erasable Programmable Read-Only Memory - - ), FRAM).