Chapter 2, Topic 2 Flashcards

RAM and ROM and Cache

1
Q

Explain Primary Memory

A
  • The only storage directly accessible by CPU.
  • At any time, may hold both data and
    instructions that are currently running on the computer system, stored as binary machine code.
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2
Q

Function of RAM

A
  • Very important.
  • Stores the executing program instructions as well as any data that is needed.
  • Instructions and data in RAM are stored in unique memory locations and every such location has an address as well as content.
  • Content is where the instructions and data are, memory location us used by CPU to find, retrieve and access data in order to send it to ALU for processing.
  • RAM is volatile, when power is lost, contents of its memory are wiped.
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3
Q

Function of ROM

A
  • Holds instructions and data in unique memory locations, which have a location, address and content.
  • ROM is used to store permanent instruction and data that cannot be changed. Used to boot and operate computer.
  • Stores instruction and data that cannot be altered/over-written.
  • Stores the BIOS: small program that has boot up instructions.
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4
Q

Function of Cache

A

A type of small, high-speed memory inside the CPU used to hold frequently used data.

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5
Q

Difference between SRAM and DRAM

A
  • SRAM is faster but more expensive than DRAM. DRAM is preferred for the main RAM of computer system.
  • Cache is a type of SRAM.
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6
Q

Difference between Level 1 and Level 2 Cache

A

L1 cache is placed on the microprocessor itself whereas L2 cache is placed between primary memory and microprocessor. Check slide 12.

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