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Internal RAM, or IRAM or on-chip RAM (OCRAM), is the address range of RAM that is internal to the CPU. Some object files contain an .iram section. Internal RAM (Random-Access Memory)
The MRC is part of reference BIOS code, which relates to memory initialization in the BIOS. It includes information about memory settings, frequency, timing, driving and detailed operations of the memory controller. The MRC is written in a C-language code, which can be edited and compiled by board makers. It provides a space to develop advanced ...
Solid-state hard drives have continued to increase in speed, from ~400 Mbit/s via SATA3 in 2012 up to ~7 GB/s via NVMe/PCIe in 2024, closing the gap between RAM and hard disk speeds, although RAM continues to be an order of magnitude faster, with single-lane DDR5 8000MHz capable of 128 GB/s, and modern GDDR even faster.
Internal – Processor registers and cache. Main – the system RAM and controller cards. On-line mass storage – Secondary storage. Off-line bulk storage – Tertiary and Off-line storage. This is a general memory hierarchy structuring. Many other structures are useful.
M. MAI Systems Corp. v. Peak Computer, Inc. MCDRAM; Mellon optical memory; Memory address; Memory architecture; Memory bandwidth; Memory bank; Memory barrier
DDR3 advances extended the ability to preserve internal clock rates while providing higher effective transfer rates by again doubling the prefetch depth. The DDR4 SDRAM is a high-speed dynamic random-access memory internally configured as 16 banks, 4 bank groups with 4 banks for each bank group for ×4/×8 and 8 banks, 2 bank groups with 4 ...
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The external data space is overlaid with the internal data space, such that the full 64 KB address space does not appear on the external bus and accesses to e.g. address 0100 16 will access internal RAM, not the external bus. In certain members of the XMega series, the external data space has been enhanced to support both SRAM and SDRAM.