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2

Do not confuse "fast" in terms of bandwidth (bytes per second) with "fast" in terms of latency (nS from beginning of address request till when bytes are in cache). Rambus used a highly serialized protocol that required multiple clocks to even start a transaction, and more clocks to transmit the address values. Thus the combination of the ...


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What's the question? First problem here is what is to be considered speed. Random access time? Cycle time? Maximum memory thruput? Average memory thruput? Either value per chip or for the whole memory subsystem? For the following I'll go with maximum memory band for the whole memory subsystem. That is when a memory page is opened and successive access is ...


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We can infer the price of one of the first ROM reading the agreement signed between the Japanese Nippon Calculating Machine (later Busicom) and Intel in February 1970 (available here). The agreement provided for manufacturing of a set of 4 chips: RAM, ROM, shift register, CPU (this was the famous Intel 4004, made by Federico Faggin). ROMs cost consisted of a ...


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