On 27.11.2007 17:45, Corey Osgood wrote: > ron minnich wrote: > >> On Nov 27, 2007 8:24 AM, Corey Osgood <[EMAIL PROTECTED]> wrote: >> >> >> >>>> + [SPD_MIN_CYCLE_TIME_AT_CAS_MAX] = 10, /* A guess for the tRAC value >>>> */ >>>> >>>> >>>> >>> This looks like it's wrong, a normal DDR400 dimm is 0x50 or so. >>> >>> >>> >>>> + [SPD_MODULE_ATTRIBUTES] = 0xff, /* FIXME later when we figure out. */ >>>> >>>> >>>> >>> 0x20 for an unbuffered dimm, 0x26 for registered. >>> >>> >> So I'm going to ask a favor. I am going from the data sheets and could >> not find this info. Can you look and tell me? I got lost in the >> numbers ... >> >> > > I cheated ;) Here's a micron datasheet for a DDR400 CL3 Dimm: > http://download.micron.com/pdf/datasheets/modules/ddr/DDA9C16_32_64x72AG.pdf > > And what should be known as the best idiot's guide to SPD out there: > http://www.simmtester.com/page/news/showpubnews.asp?num=101 > > I have the JEDEC datasheet on this, but I have so damn many JEDEC > datasheets I simply can't figure out which one it is. The > "SPD_ACCEPTABLE_CAS_LATENCIES" also should be 0x50 (5ns). >
Can you add these links to the wiki, probably to a page about SPD or RAM? Regards, Carl-Daniel -- linuxbios mailing list linuxbios@linuxbios.org http://www.linuxbios.org/mailman/listinfo/linuxbios
