Calolo wrote on Today, 17:09:

Hello […]
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Hello

I have flashed the BIOS of my KT7A v1.1 to A9 (modded for Athlon XP) to use a mobile Barton 2400+.

I need to press reset when the PC cold boot, then the CPU is well recognized but limited to 1666MHz (12.5 x 133).

Has someone found a solution/BIOS option to make it boot directly?

Also if I strap CPU pins to enable high multipliers, how can I access the 3x for DOS slowdown?

Thank you.

Since you have a mobile Barton. You should be able to use pciset (to make setmul work on a KT133A) and setmul commands in your autoexec.bat to make the multiplier whatever the CPU will allow

My XP-M 2800+ will only recognise multipliers up to 16x, probably because it’s a late one.

Link to my thread which has a link to the post about pciset

Re: Socket 7 and Socket A shenanigans. 2 (or possibly 3) retro builds. Attempting to build 600MHz 430TX

I don’t have a kt7a but I have same chipset on a board made by Soltek. It seems to have a lot of the same quirks

I can’t help with the reset trick. The Soltek board POSTs fine with a Barton installed. I used bios patcher to enable the board to recognise the CPU, but it still posted without this patch. Just said “unknown CPU”

in my experience, modifying the socket of the CPU to change the multiplier caused more problems; the system would only post with 17x multiplier, this was too fast for any CPU I had at the time. (2266Mhz) now I have an XP-M I can get to 2350-2400MHz with 16x multiplier by increasing the FSB

FullYes wrote on Today, 18:29:

Since you have a mobile Barton. You should be able to use pciset (to make setmul work) and setmul commands in your autoexec.bat […]
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Calolo wrote on Today, 17:09:

Hello […]
Show full quote

Hello

I have flashed the BIOS of my KT7A v1.1 to A9 (modded for Athlon XP) to use a mobile Barton 2400+.

I need to press reset when the PC cold boot, then the CPU is well recognized but limited to 1666MHz (12.5 x 133).

Has someone found a solution/BIOS option to make it boot directly?

Also if I strap CPU pins to enable high multipliers, how can I access the 3x for DOS slowdown?

Thank you.

Since you have a mobile Barton. You should be able to use pciset (to make setmul work) and setmul commands in your autoexec.bat to make the multiplier whatever the CPU will allow

My XP-M 2800+ will only recognise multipliers up to 16x, probably because it’s a late one.

Link to my thread which has a link to the post about pciset

Re: Socket 7 and Socket A shenanigans. 2 (or possibly 3) retro builds. Attempting to build 600MHz 430TX

I don’t have a kt7a but I have same chipset on a board made by Soltek. It seems to have a lot of the same quirks

Thanks for your reply.

I have tried the pciset command before "cpuspd m3" and now it runs @400MHz 3x133 !

So it will still work even if I strap the CPU pins to enable high multipliers?

You don’t need to ‘strap’ anything. Just try a higher multiplier with your setup as it is now. You should be able to set it to at least the highest rated for your CPU just by using software

So, mine as it is now can be set from 3x to 16x. Modification of the motherboard is not needed 😎👍

FullYes wrote on Today, 19:49:

You don’t need to ‘strap’ anything. Just try a higher multiplier!

I have tried using pciset and cpuspd on my Barton 2400+, I can only go up to 13.5x (1800MHz), no overclocking using multiplier.

Ok. What you describe is how my cpu behaves as well - it does not let you exceed the stock multiplier with software. Since I didn’t try this CPU in my board when I modified the board, I cannot say if you will succeed or not, because I put it back to standard now due to the strange posting behaviour.

Another user; Mr.Hunt Did succeed in modifying his Soltek kt133a motherboard (same as mine) to work with his xp-m 2800+ with 17x multiplier. So perhaps it will work for you as well

The thread where we discussed this in more detail is here

Re: Socket 462 SL-75KAV weird posting behaviour after pin mod