Sir,
(1) On my sis630et board P6STMT, bios value of 0x8E is 00
(2) if I set 0x8E to 00 in IPL, ipl hangs on using stack to read linuxbios from DOC to ram
(3) if I set 0x8E to 03 in IPL, linuxbios can start linux image successfully, but linux hangs at random time.
(4) conclusion
IPL init SDRAM has some trouble, memory can't work stably. It's so strange I have setted the values after the bios values. Is there any trick to init SDRAM on SIS630ET?
tks
zhu
Nick Jarmany <nick.jarmany@densitron.co.uk> wrote:
Zhu,
On SiS630ET x8Eh has two active bits:-
Bit 0: SDRAM synchronous mode. 0=Enable, 1=Disable
Bit 1:Relationship between CPU & SDRAM clocks. 0=CPU>SDRAM, 1=CPU<SDRAM
Default value of this register at POR=00h
Regards,
Nick
Hi, lists,
I've got one ECS p6stmt motherboard based on sis630et. I have dumped pci host bridge settings:
P6STMT
00:00.0 Host bridge: Silicon Integrated Systems: Unknown device 0630 (rev 30)
00: 39 10 30 06 07 00 10 22 30 00 00 06 00 20 80 00
10: 00 00 00 d8 00 00 00 00 00 00 00 00 00 00 00 00
20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
30: 00 00 00 00 c0 00 00 00 00 00 00 00 00 00 00 00
40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50: 9e 00 c5 00 00 19 00 01 00 15 51 00 00 00 00 00
60: 0b 00 00 a1 00 00 00 00 01 50 c6 00 e0 00 00 00
70: 3f 90 00 00 00 00 00 00 00 00 00 00 00 00 00 00
80: 20 ff 7f 1f 60 00 03 40 00 08 00 00 78 88 00 55
90: 00 00 00 00 40 00 00 01 00 00 00 00 02 00 00 00
a0: 00 00 03 01 aa 00 00 00 00 00 00 00 00 00 f8 00
b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
c0: 02 00 20 00 07 02 00 1f 04 00 00 00 00 00 00 00
d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
SPD dump:
Memory Type 0x04
Number of Row Address bits 0x0d
Number of Column Address bits 0x0a
Number of Sides 0x01
Number of Banks 0x04
I try to set the values just as the same as bios settings. But when ipl use stack, it hangs on copying linuxbios from DOC. It's obvious that memory init failed.
I noticed that 0x8e is 0, It's very different with winfast6300's. winfast6300 0x8e is 03.
What's the problem behind it?
tks
zhu
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