Quoting Corey Osgood <[EMAIL PROTECTED]>: > Joseph Smith wrote: >> Can someone explain the significance of the addr_offset variable in >> raminit.c on the i440bx and i82810? Also why is this set to 0x1d0 for >> the Mode register set (MRS)? >> >> Thanks - Joe >> >> > > MRS is a setting within the ram that's set by reading from a certain > location while the northbridge is in MRS mode. It essentially tells the > ram what timings to run at. For the most part, the only values you'll > ever need for SDRAM are 0x1d0 for CL3 and 0x150 for CL2, but DDR and > DDR2 make more advanced use of MRS and E(xtended)MRS. Read the JEDEC > standard for more info. > > -Corey > Thanks Corey, that makes sense. Not sure how it tells the memory what timings to run at though. Does it tell the northbridge what timings to run at?
Thanks - Joe -- linuxbios mailing list [email protected] http://www.linuxbios.org/mailman/listinfo/linuxbios
