[LinuxBIOS] DIMM Page Size
Segher Boessenkool
segher at kernel.crashing.org
Wed Jul 11 13:48:32 CEST 2007
> Anyone know what the mathmatical calculation is to determine a Dimms
> "Page Size"?? I found this but it does not seem to work:
>
> Page size = (2^col)*bus_width
> where,
> col = number of column address lines (SPD byte 4: Number of Column
> Addresses)
> bus_width = number of data(DQ) lines (???SPD byte 13: SDRAM Device
> Width???)
"device width" is the number of data lines per DRAM chip on
your DIMM. This isn't the same as the number of data lines
on the DIMM itself; that is 64 usually (not counting the ECC
bits). This info is in the SPD as well.
Segher
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