LSS10999 wrote on Yesterday, 10:00:

AFAICT doing BSEL mod on the CPU will not work with this board. It needs to be done on the motherboard by adding a wire to alter the BSEL value passed to the NB so it'll configure the FSB to 800. I've put that in the OP.

Yeah this is what I was referring to. Just a simple wire. The X6800 has a 11x multi which ends up being 2.2Ghz @ 200Mhz. I'm hoping that it can get to 16x or over.

Here's a benchmark from @agent_x007 and his X6800/HD 3850. Different mobo/chipset and DDR2 ram though.

But you can see slightly better CPU performance at only 3.3ghz and much better GPU performance compared to the benchmark I posted previously. I'm guessing the extra GPU performance could be due to the 4MB L2 cache. Or maybe it could be due to DDR2, or the mobo chipset. Who knows.

Either way, it's compelling me to try an X6800. I would really like to have proper shutdown.

I just did an inspection across V008, V009 and V00C regarding PCI IRQ Routing table using AMIBCP v3.13.

It seems V008 had two entries related to PCI Bus 01h which is probably the AGP section. V009 had one, while V00C had none. This probably explains why AGP slot is kind of broken with V00C.

However, it appears that I could not add new entries into the table directly from AMIBCP. Only modify existing, or removing it using "Cut" in the right click menu.

EDIT: Here's the particular PCI IRQ Routing line in question. The columns are comma-separated.

1PCI Bus,Dev.#,IntA Reg,IntA Bitmap,IntB Reg,IntB Bitmap,IntC Reg,IntC Bitmap,IntD Reg,IntD Bitmap,Phys.Slot
201,00,60,DCF8,00,0000,00,0000,00,0000,01

The PCI IRQ Routing table of V00C is otherwise identical to that of V009, just that the line above regarding PCI Bus 01h is absent. On the other hand, on all BIOS versions, there's a line at the end of the routing table that's filled with all zeros. Since I never really modified PCI IRQ Routing table for an AMI BIOS I'm not really sure if this all-zero line can be used for the purpose of adding back the missing entry so the AGP slot could work.

I'm not sure which AMIBCP version works safest with our board's BIOS, that is, ensuring a good chance the edited BIOS can boot without major issues.

LSS10999 wrote on Yesterday, 13:14:

I just did an inspection across V008, V009 and V00C regarding PCI IRQ Routing table using AMIBCP v3.13. […]
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I just did an inspection across V008, V009 and V00C regarding PCI IRQ Routing table using AMIBCP v3.13.

It seems V008 had two entries related to PCI Bus 01h which is probably the AGP section. V009 had one, while V00C had none. This probably explains why AGP slot is kind of broken with V00C.

However, it appears that I could not add new entries into the table directly from AMIBCP. Only modify existing, or removing it using "Cut" in the right click menu.

EDIT: Here's the particular PCI IRQ Routing line in question. The columns are comma-separated.

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1PCI Bus,Dev.#,IntA Reg,IntA Bitmap,IntB Reg,IntB Bitmap,IntC Reg,IntC Bitmap,IntD Reg,IntD Bitmap,Phys.Slot
201,00,60,DCF8,00,0000,00,0000,00,0000,01

The PCI IRQ Routing table of V00C is otherwise identical to that of V009, just that the line above regarding PCI Bus 01h is absent. On the other hand, on all BIOS versions, there's a line at the end of the routing table that's filled with all zeros. Since I never really modified PCI IRQ Routing table for an AMI BIOS I'm not really sure if this all-zero line can be used for the purpose of adding back the missing entry so the AGP slot could work.

I'm not sure which AMIBCP version works safest with our board's BIOS, that is, ensuring a good chance the edited BIOS can boot without major issues.

I have no experience with BIOS modifications so keep that in mind.

I asked ChatGPT (Which should be taken with a grain of salt), it seems to indicate that you can utilize the last line (all zeros) to add the missing AGP mapping entry, but it may not work if the BIOS expects a terminator at the end of the routing table.

Another option would be to replace the first PCI slot (Phys slot #2) entry with the missing AGP entry. This would be the ideal scenario if your AGP GPU is a two slot card, which effectively renders the first PCI slot as defunct. However the HD3850 is a single slot card so the first PCI slot is still accessible.

Perhaps the better option would be to replace the last PCI slot (Phys slot #6) with the missing AGP entry. This slot is not really usable if you're utilizing two ISA cards, which is going to be true in my case.

If someone with a programmer is willing to test, I would try replacing the all zeros entry first. If that doesn't work, try replacing the PCI slots instead.

Just had another thought - shouldn't there be an entry for the onboard VGA? If so, replacing this with the missing AGP entry might be the way to go. The difficult part would be identifying it.

Are we certain the v009 doesn't have the IRQ routing issue? Personally I haven't tested it.