Let me take another look at it all ... I'm just finding it difficult to get a good place to bite into ...
----- Original Message ----- >From: <[EMAIL PROTECTED]>, <Eric W. Biederman> >To: "Ian" <[EMAIL PROTECTED]> >Subject: Re: RAM Init >Date: Mon, 18 Feb 2002 21:33:01 -0700 > > "Ian" <[EMAIL PROTECTED]> writes: > > > The whole RAM init process has me very confused ... before I can start hacking > > around > > > > to squash my ram config into 512bytes ... has anyone got a good ram reference > > ... > > > > something that explains the RAM init concept from a BIOS' point of view? > > Normally the RAM datasheets detail the procedure that must be followed. For > the setup. The detection is a completely seperate step. > > > I'm looking at RAM detection code here for at least three different types of > > RAM, and I'm > > > > simply not interested in it ... I don't have the space to do this properly. > > Knowing what kind of chipset you are working with and what kind of ram > you are targeting would be useful. As far as I know the RAM detection > code is quite straight forward, and is practically the same between > all types of non embedded RAM. Which SPD bytes you need to read, > vary dramatically from RDRAM to SDRAM to DDR-SDRAM, and where you > write those values vary dramatically between chipsets. But the core > is pretty simple. > > Eric > >
