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Graph of Semiconductor memory
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Central processing unit
Magnetic-core memory
MOS integrated circuit
Read-only memory
Semiconductor memory
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Central processing unit
→
Semiconductor memory
depends on
The CPU needs main memory to store instructions and data; semiconductor memory enables memory hardware to shrink and memory access to speed up alongside the processor.
Read-only memory
→
Semiconductor memory
specializes
ROM is a type of semiconductor memory that retains fixed contents when power is removed, commonly used for lookup tables, characters, and microprogram code.
Semiconductor memory
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MOS integrated circuit
depends on
MOS integration processes allow large numbers of memory cells, decoding circuits, and read/write circuits to be fabricated on the same chip.
Semiconductor memory
→
Magnetic-core memory
replaces
Once MOS DRAM became competitive in unit cost and density, it began replacing magnetic-core arrays in computer main memory.