Page 1 of 2

help, intel ym430tx new bios locked amd processor

Posted: Fri Jul 20, 2007 9:41 pm
by ie
need help to unlock intel ym430tx award 4.51 bios.
This board use award 4.51 bios,
I upgrade the bios from BIOS 1.00.02.YM1 to 1.00.03.YM1.
http://downloadmirror.intel.com/529/eng/10003ym1.exe
The k6-2 processor were locked, pc hangs at the first screen after showed Intel Corporation YM430TX Motherboard.
4 digit Debug Stop at 0E 0D, seems locked just after passed the graphic testing.
My hdd contain the backup bios of 1.00.02.YM spoilt, so I can not flash back,
I can not find 1.00.02.YM from intel site or any other site.
Is any expert interested to look at the intel award bios?
It looks like a normal award 4.51 bios, 128kb only and can be released by cbrom.
thanks a lot!

Posted: Fri Jul 20, 2007 11:13 pm
by KachiWachi
I'm trying to understand what you mean by "locked".

Can you elaborate please?

Thanks.

Posted: Fri Jul 20, 2007 11:42 pm
by ie
KachiWachi wrote:I'm trying to understand what you mean by "locked".

Can you elaborate please?

Thanks.
Thanks a lot for your guidence,
After the debug card passed "0d" for graphic,
The screen only showes 3 rows,
"Award Modular BIOS Version 1.00.03.YM1
Copyright (C) 1984-95, Award Software, Inc.

Intel Corporation YM430TX Motherboard"
And the Cursor stop and blinking at the position of "d" in the last word "Motherboard",
If I change the k6-2 to a p55 mmx, then everything is ok under 1.00.03.YM1.
I got information that Intel blocked k6-2 cpu on YM430TX since bios version 1.00.03.YM1, those user able to use it again when flash back to old bios 1.00.02.YM1.

Posted: Fri Jul 20, 2007 11:45 pm
by ie
I have upload the extracted 1.00.03.YM1 bios from intel original exe file to
http://www.ntu.edu.sg/home5/yang0072/YM430TX.003

Posted: Sat Jul 21, 2007 3:51 am
by KachiWachi
OK.

So you are trying to install a K6-2 on this machine, and the CPU is not being recognized...correct?

Which exact K6-2?

Thanks.

Posted: Sat Jul 21, 2007 9:12 am
by cp
yes, apparently the 03 version locks out the amd k6-2. maybe edwin knows where to get a version 02 bios.

Posted: Sat Jul 21, 2007 12:50 pm
by KachiWachi
Perhaps the OP should contact BiosMan and have him take a look at it.

Thanks.

Posted: Sat Jul 21, 2007 12:53 pm
by edwin
The only bios ever released by Intel was the 03 version. So unless we get hold of an 02 backup, Jan will have to patch in K6 support...

Posted: Sun Jul 22, 2007 10:23 am
by ie
KachiWachi wrote:OK.

So you are trying to install a K6-2 on this machine, and the CPU is not being recognized...correct?

Which exact K6-2?

Thanks.
thanks, the most common k6-2-400, cxt core, afx 2.2v.

Posted: Sun Jul 22, 2007 10:27 am
by ie
edwin wrote:The only bios ever released by Intel was the 03 version. So unless we get hold of an 02 backup, Jan will have to patch in K6 support...
just found a 02 bios,
http://forum.rom.by/topic9813.html
however,the download link is expired,
his board burnt,
even that user seems deleted by forum.rom.by

Posted: Sun Jul 22, 2007 1:15 pm
by edwin
I've been there and even tried archive.org but no dice. There's one last option and that is emailing Intel tech support to see if they have rev 02 offline somewhere.

Posted: Sun Jul 22, 2007 1:22 pm
by KachiWachi
It's a shame that the OP didn't/couldn't back up the original BIOS. :(

I'd still give Jan a shot though.

Just out of curiosity, if you jumper the CPU as something less than 400 MHz (like 233 MHz perhaps), does it get recognized?

Thanks.

Posted: Sun Jul 22, 2007 4:49 pm
by cp
ie: do you have another non-Intel processor somewhere? something like a Cyrix, Rise or IDT/Centaur cpu? if so please do run a test if it boots up with one of those.

my suggestion: look for a cpuid instruction. cpuid with EAX=0 returns the vendor id in EBX-ECX-EDX. if it's not GenuineIntel (or rather 'uneGletnIeni' imho that really hurts) just stop..but that's pure guesswork :)

Posted: Tue Jul 24, 2007 3:55 pm
by KenH
KachiWachi wrote:It's a shame that the OP didn't/couldn't back up the original BIOS. :(
He did, but lost the drive it was stored on.
ie wrote:My hdd contain the backup bios of 1.00.02.YM spoilt, so I can not flash back,

Posted: Tue Jul 31, 2007 1:09 am
by apple_rom

Code: Select all

00000A85: 80BEDB0101                   cmp         b,[bp][01DB],001
00000A8A: 740A                         je          000000A96  ---↓
00000A8C: 66B801000000                 mov         eax,000000001
00000A92: 0FA2                         cpuid
00000A94: EBFE                         jmps        000000A94  ---↑
Remove stop at A94 with nop.