[U-Boot-Users] PQ2FADS-ZU PQ28280 access to 60x bus SDRAM failed when localbus is in PCI mode?

Jason McMullan jason.mcmullan at gmail.com
Thu Jun 16 19:58:47 CEST 2005

On Wed, 2005-06-15 at 17:42 +0800, KokHow Teh wrote:
>             I am having trouble with my PQ2FADS-ZU board with a PQ2 8280
> processor that when the localbus is put into PCI mode with LBPC = 01, all
> accesses to 60x bus SDRAM fails. Uboot failed in get_ram_size() routine.
> The selection of localbus operation mode is done by SW9. Switch the jumper
> back to localbus SDRAM mode, U-boot boots to the prompt and access to 60x
> SDRAM is fine. Does anybody have similar experience? Any insight is
> appreciated.

For the Mailling List Archives:

	If you're using the 'default' 100Mhz bus crystal on your
PQ2FADS, and all other jumpers are factory defaults, the
MODCKH[0-3]_MODCK[1-3] settings on SW6 are:

JP9 -> Local:	0101_111

JP9 -> PCI:	1010_010	(66Mhz PCI bus)

Where '1' is the "Off" switch position, and '0' is the 'On' position.

Jason McMullan <jason.mcmullan at gmail.com>
"Sure, send me the latest Knoppix DVD as an attachment..."
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