Maximum memory support

[hamzeah]

Hi,
I have a question about maximum memory support on Allwinner processors, inc. A20 and A64. In datasheet I see:

A20:"Support 2GB address space"

A64:"up to 3GB address space"

Does these mean the maximum installable memory on them?

on the other hand, in official page, written that A64 has 1GB memory support! it is confusing.
Thank you

Edited November 23, 2020 by hamzeah
forget to add something

[TRS-80]

Another good resource is linux-sunxi, although I could not seem to see any answer to your question in a (very quick) scan of that page.  But maybe you can dig deeper and find something helpful from there?