[Please always write to the mailing list, not individual developers]
On Thu, Jun 21, 2007 at 12:54:40PM +0200, Robert Millan [ackstorm] wrote:
Hi!
I have a Compaq Deskpro board with 440BX chipset that I'd like to put LinuxBIOS in. I noticed that defaults for Tyan are hardcoded, so gave a look at the source to see if I could replace the defaults to get it working for me.
However, I couldn't find any reference to which constants are hardcoded. The numbers in i440bx.h look like based on Intel specs, not sure if they're those?
Yep, i440bx.h is fine, no changes needed.
You have to change some values in raminit.c, e.g. the DRB* values and most of the stuff from sdram_set_spd_registers(). If you use only one 64MB DIMM in the first slot it may even work without modifications.
Otherwise you can run "lspci -xxx -s 0:0.0" to get the values which should work for your system. Reading parts of the datasheet is probably a good idea if you want to give this a try.
I still didn't get around to making the 440BX RAM init code fully generic; I hope to be able to do so soon. I'm afraid we'll have to switch to CAR though, I ran into massive romcc problems the last time I tried this.
Uwe.
On Fri, Jun 22, 2007 at 04:22:59PM +0200, Uwe Hermann wrote:
[Please always write to the mailing list, not individual developers]
Oops. Sorry about that.
On Thu, Jun 21, 2007 at 12:54:40PM +0200, Robert Millan [ackstorm] wrote:
Hi!
I have a Compaq Deskpro board with 440BX chipset that I'd like to put LinuxBIOS in. I noticed that defaults for Tyan are hardcoded, so gave a look at the source to see if I could replace the defaults to get it working for me.
However, I couldn't find any reference to which constants are hardcoded. The numbers in i440bx.h look like based on Intel specs, not sure if they're those?
Yep, i440bx.h is fine, no changes needed.
You have to change some values in raminit.c, e.g. the DRB* values and most of the stuff from sdram_set_spd_registers(). If you use only one 64MB DIMM in the first slot it may even work without modifications.
Otherwise you can run "lspci -xxx -s 0:0.0" to get the values which should work for your system. Reading parts of the datasheet is probably a good idea if you want to give this a try.
I still didn't get around to making the 440BX RAM init code fully generic; I hope to be able to do so soon. I'm afraid we'll have to switch to CAR though, I ran into massive romcc problems the last time I tried this.
Turns out the BIOS is soldered PLCC (and I can't flash it because it fails POST). If I manage to replace that with a socket I'll follow your advice to try get it working.
Thank you
-
Robert Millan -
Uwe Hermann