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DRAMS

29 bytes added, 18:06, 17 October 2016
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16Kx1 bit DRAM chip
8 of this IC make the lower 16k part of the [[ZX Spectrum16Spectrum 16K/48 48K]] RAM.
e.g. NEC D416C-2
The addressing logic uses 8 line (A<sub>0</sub> to A<sub>7</sub>) for row address (RAS) and 7 line (A<sub>0</sub> to A<sub>6</sub>) for column address (CAS). At CAS the A<sub>7</sub> line has to be fixed at logic 0 or 1 depending on chip type.
8 of this IC make the upper 32k part of the [[ZX Spectrum48 Spectrum 16K/48K|ZX Spectrum 48K]] RAM.
e.g:
64Kx1 bit DRAM chip
16 of this IC make the 128K RAM of the [[ZX Spectrum 128K]] RAM.
e.g:NEC D4164C-3
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