mockingbird wrote on 2025-10-27, 20:11:

Flash kt7_a94x.bin from here. […]
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Martin85 wrote on 2025-10-27, 19:08:

So, been sorting all my stash... Tried to install two Athlons, one is a XP1500+, the other one is the XP2400+. The first gets recognized from the getgo, the latter instead needed some resets, it displayed unknown processor, but eventually went through the POST. Unfortunately I don't have an HDD installed at the moment.

Flash kt7_a94x.bin from here.

I also found the intel counterpart of the KT7a-Raid, the ABIT BX133-Raid. That one is paired with a P3-750MHz. Ok, it has one PCI less, but as far as I read, it should be feature wise on the same level. Though I wonder if the intel chipset has less problems with PCI audio.

The KT7A is a much better choice than the BX133 and dare I say even better than K6/3+ because like K6/3+, it has multiplier adjustment but is a lot faster.

But if you are going to use PCI audio, then just use anything. The whole point here is the ISA slot for DOS compatibility.

Was just surfing the internets and found out that the BX133-Raid has a connector called SBLink or also PC-PCI. Its purpose is to improve compatibility by giving the card direct access to DMA and interrupt signals, thus mimicking an ISA card, when using PCI for audio. Of course you need a sound card with that connector too in order to be able to use it.

Martin85 wrote on 2025-10-28, 18:12:

Was just surfing the internets and found out that the BX133-Raid has a connector called SBLink or also PC-PCI. Its purpose is to improve compatibility by giving the card direct access to DMA and interrupt signals, thus mimicking an ISA card, when using PCI for audio. Of course you need a sound card with that connector too in order to be able to use it.

Yes, I recommend YMF744 or YMF724 for SB-Link and I can confirm excellent support for it.

Martin85, mockingbird,

The KT7A has no connector for SB-Link.

Edit: I snipped the rest because I was being a jerk and neither of you deserved my hostility. My apologies.

Hey KT7aGuy, I think they just posted in this thread by mistake. No big deal 😀

Hey guys, didn't mean to hijack this thread. I understand it is about the KT7A... Just wanted to highlight maybe one of the most obscure differences between this one and its Intel sibling. Anyway, went through almost the whole thread and decided to keep both of them 😉

Damn. I used to have a KT7A-RAID about 20 years ago. I built a machine for my sister based on it while I had an A7N8X-X

Now I know the potential I wish I’d’ve kept mine!

Shameless plug. I have bought a similar KT133A-based board recently with similar ambitions to what’s been discussed in this thread. If anyone wants to take a look at some trouble I’m having, I’d appreciate any suggestions

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

Many thanks and happy modding!

I have a KT7A-RAID v1.0. It works fine with a Duron 1000. However, when I tried a Barton XP-M 2500+, it would refuse to post.

The only activity would be the fans spinning and nothing else. No beep codes, even when no GPU or RAM were inserted.

I tried multiple BIOS revisions, a full mobo recap, different power supplies, PIN mod. Nothing worked.

Then I found out that a bloke named Paul created a "FAQ" website for this board. This was done back in 2001-2003 and no longer exists so it wasn't easy to find. However, archive.org to the rescue!

https://web.archive.org/web/20031203090528/ht … wfaqs.cfm?fid=2

I recommend that everyone with a KT7/KT7A/KT7A-RAID motherboard should take the time to read the site and its many pages. It contains a lot of good information and you are bound to learn something new.

Anyway, I found this little snippet under the "Processor" section:

So after giving up and putting the KT7A back into its box, I decided "One more try", pulled it back out and hooked it up.

The reset worked. For the first time I managed to get the motherboard to post with the Barton XP-M 2500+. Step 1. Power-on the computer. Step 2. Wait a few seconds Step 3. Hit the reset button.

Now I need to come up with a way to automate this, because the case I had planned to put it in, does not have a reset button! Lol.

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

Shiftyy wrote on 2025-12-16, 14:05:

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

Thanks for the link. It seems to be a useful resource. I am not sure I would be happy with resetting the PC on first boot. Even if automated, its a bit clunky.

I have a KT7A-RAID 1.2. Currently it has a 750Mhz Athlon in it, but I have purchased a 1.4Ghz Thunderbird to put in it.

Whilst I understand the reasoning behind trying to max out this board with an Athlon XP, I think a 1.4Ghz should be great for my purposes. This will be my fastest machine with ISA slot (the next fastest being a 700Mhz PIII). I want it to be a high-end DOS machine. Probably will just put a basic graphics card in it, as I have other machines for Windows 9x. Also power draw is a concern with this CPU, so don't want a power hungry GPU also.

RetroPCCupboard wrote on 2025-12-16, 19:45:

Shiftyy wrote on 2025-12-16, 14:05:

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

Thanks for the link. It seems to be a useful resource.

Their recommended BIOS settings was very useful for me and others should also utilize it.

RetroPCCupboard wrote on 2025-12-16, 19:45:

Shiftyy wrote on 2025-12-16, 14:05:

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

I am not sure I would be happy with resetting the PC on first boot. Even if automated, its a bit clunky.

It doesn't appear to be as bad as first thought. It seems I only need to do the reset trick if I disconnect the power completely. After that, it will post correctly when pressing the power button. It's still not ideal though.

Just an update:

I have finished configuring the PIN mod. I ended up doing the 5-4 PIN mod as described on this webpage:
https://www.emboss.co.nz/amdmults/

And here is a pic of the PIN mod:

One weird behavior I encountered, after completing the 5-4 PIN mod, I could get it to reliably post when set to 100Mhz FSB. However, when set to 133Mhz FSB, I ran into issues.

The only multiplier that worked with 133Mhz FSB was 9x. Any lower, or higher would result in no post. Strange behavior. Again, 100Mhz FSB was fine, and I could set it to pretty much any multiplier. But with 133Mhz FSB, it would only post when the multiplier is set to 9x.

Anyway, a 9x multiplier, at 133Mhz FSB, with the 5-4 PIN mod gives me 2.266Mhz, which is perfectly fine and I am very happy with that.

I will start trying to overclock the FSB once I am done setting up all the operating system stuff and benchmark/testing software.

Another weird thing, after completing the 5-4 PIN mod, I can now boot the computer without needing to press restart at all. Even after plugging in the power. More weird behavior. I had done the PIN mod previously and I still couldn't get it to post. However it wasn't the same 5-4 PIN mod, it was the one from this webpage, which works differently:
https://www.ocinside.de/workshop_en/amd_pinmod/

Here is a pic of my (failed) PIN mod from the above webpage:

Shiftyy wrote on 2025-12-16, 14:05:

I have a KT7A-RAID v1.0. It works fine with a Duron 1000. However, when I tried a Barton XP-M 2500+, it would refuse to post. […]
Show full quote

I have a KT7A-RAID v1.0. It works fine with a Duron 1000. However, when I tried a Barton XP-M 2500+, it would refuse to post.

The only activity would be the fans spinning and nothing else. No beep codes, even when no GPU or RAM were inserted.

I tried multiple BIOS revisions, a full mobo recap, different power supplies, PIN mod. Nothing worked.

Then I found out that a bloke named Paul created a "FAQ" website for this board. This was done back in 2001-2003 and no longer exists so it wasn't easy to find. However, archive.org to the rescue!

https://web.archive.org/web/20031203090528/ht … wfaqs.cfm?fid=2

I recommend that everyone with a KT7/KT7A/KT7A-RAID motherboard should take the time to read the site and its many pages. It contains a lot of good information and you are bound to learn something new.

Anyway, I found this little snippet under the "Processor" section:

So after giving up and putting the KT7A back into its box, I decided "One more try", pulled it back out and hooked it up.

The reset worked. For the first time I managed to get the motherboard to post with the Barton XP-M 2500+. Step 1. Power-on the computer. Step 2. Wait a few seconds Step 3. Hit the reset button.

Now I need to come up with a way to automate this, because the case I had planned to put it in, does not have a reset button! Lol.

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

Thanks for this. I’ll try it with my board. I feel like i tried a similar procedure already, but now i know it could be solution, i will give it another go!

Shiftyy wrote on Yesterday, 12:57:

Just an update: […]
Show full quote

Just an update:

I have finished configuring the PIN mod. I ended up doing the 5-4 PIN mod as described on this webpage:
https://www.emboss.co.nz/amdmults/

And here is a pic of the PIN mod:

One weird behavior I encountered, after completing the 5-4 PIN mod, I could get it to reliably post when set to 100Mhz FSB. However, when set to 133Mhz FSB, I ran into issues.

The only multiplier that worked with 133Mhz FSB was 9x. Any lower, or higher would result in no post. Strange behavior. Again, 100Mhz FSB was fine, and I could set it to pretty much any multiplier. But with 133Mhz FSB, it would only post when the multiplier is set to 9x.

Anyway, a 9x multiplier, at 133Mhz FSB, with the 5-4 PIN mod gives me 2.266Mhz, which is perfectly fine and I am very happy with that.

I will start trying to overclock the FSB once I am done setting up all the operating system stuff and benchmark/testing software.

Another weird thing, after completing the 5-4 PIN mod, I can now boot the computer without needing to press restart at all. Even after plugging in the power. More weird behavior. I had done the PIN mod previously and I still couldn't get it to post. However it wasn't the same 5-4 PIN mod, it was the one from this webpage, which works differently:
https://www.ocinside.de/workshop_en/amd_pinmod/

Here is a pic of my (failed) PIN mod from the above webpage:

It looks like you might’ve bridged 3 pins in the middle there instead of 2 on your original underside of motherboard pin mod

FullYes wrote on Yesterday, 13:26:

Shiftyy wrote on 2025-12-16, 14:05:

I have a KT7A-RAID v1.0. It works fine with a Duron 1000. However, when I tried a Barton XP-M 2500+, it would refuse to post. […]
Show full quote

I have a KT7A-RAID v1.0. It works fine with a Duron 1000. However, when I tried a Barton XP-M 2500+, it would refuse to post.

The only activity would be the fans spinning and nothing else. No beep codes, even when no GPU or RAM were inserted.

I tried multiple BIOS revisions, a full mobo recap, different power supplies, PIN mod. Nothing worked.

Then I found out that a bloke named Paul created a "FAQ" website for this board. This was done back in 2001-2003 and no longer exists so it wasn't easy to find. However, archive.org to the rescue!

https://web.archive.org/web/20031203090528/ht … wfaqs.cfm?fid=2

I recommend that everyone with a KT7/KT7A/KT7A-RAID motherboard should take the time to read the site and its many pages. It contains a lot of good information and you are bound to learn something new.

Anyway, I found this little snippet under the "Processor" section:

So after giving up and putting the KT7A back into its box, I decided "One more try", pulled it back out and hooked it up.

The reset worked. For the first time I managed to get the motherboard to post with the Barton XP-M 2500+. Step 1. Power-on the computer. Step 2. Wait a few seconds Step 3. Hit the reset button.

Now I need to come up with a way to automate this, because the case I had planned to put it in, does not have a reset button! Lol.

Anyway, so far in this thread, no-one has mentioned Paul's FAQ website, nor the above fix, so I thought it was worth posting.

Thanks for this. I’ll try it with my board. I feel like i tried a similar procedure already, but now i know it could be solution, i will give it another go!

Good-luck. I hope it works out for you.

FullYes wrote on Yesterday, 13:32:

Shiftyy wrote on Yesterday, 12:57:

Just an update: […]
Show full quote

Just an update:

I have finished configuring the PIN mod. I ended up doing the 5-4 PIN mod as described on this webpage:
https://www.emboss.co.nz/amdmults/

And here is a pic of the PIN mod:

One weird behavior I encountered, after completing the 5-4 PIN mod, I could get it to reliably post when set to 100Mhz FSB. However, when set to 133Mhz FSB, I ran into issues.

The only multiplier that worked with 133Mhz FSB was 9x. Any lower, or higher would result in no post. Strange behavior. Again, 100Mhz FSB was fine, and I could set it to pretty much any multiplier. But with 133Mhz FSB, it would only post when the multiplier is set to 9x.

Anyway, a 9x multiplier, at 133Mhz FSB, with the 5-4 PIN mod gives me 2.266Mhz, which is perfectly fine and I am very happy with that.

I will start trying to overclock the FSB once I am done setting up all the operating system stuff and benchmark/testing software.

Another weird thing, after completing the 5-4 PIN mod, I can now boot the computer without needing to press restart at all. Even after plugging in the power. More weird behavior. I had done the PIN mod previously and I still couldn't get it to post. However it wasn't the same 5-4 PIN mod, it was the one from this webpage, which works differently:
https://www.ocinside.de/workshop_en/amd_pinmod/

Here is a pic of my (failed) PIN mod from the above webpage:

It looks like you might’ve bridged 3 pins in the middle there instead of 2 on your original underside of motherboard pin mod

Nah I bridged the correct pins according to the website:

Ah ok fair enough!

Shiftyy wrote on Yesterday, 12:57:

Just an update: […]
Show full quote

Just an update:

I have finished configuring the PIN mod. I ended up doing the 5-4 PIN mod as described on this webpage:
https://www.emboss.co.nz/amdmults/

And here is a pic of the PIN mod:

One weird behavior I encountered, after completing the 5-4 PIN mod, I could get it to reliably post when set to 100Mhz FSB. However, when set to 133Mhz FSB, I ran into issues.

The only multiplier that worked with 133Mhz FSB was 9x. Any lower, or higher would result in no post. Strange behavior. Again, 100Mhz FSB was fine, and I could set it to pretty much any multiplier. But with 133Mhz FSB, it would only post when the multiplier is set to 9x.

Anyway, a 9x multiplier, at 133Mhz FSB, with the 5-4 PIN mod gives me 2.266Mhz, which is perfectly fine and I am very happy with that.

I’m quoting you again as I have just discovered similar behaviour with my board.

Bad news first: reset button trick doesn’t work for me

Good news: while I was setting up the dip switches for 133MHz FSB and 7x/15x multi I accidentally selected the 9x/17x multi and it POSTs. Only downside is this CPU isn’t stable at 2266MHz at stock volts, but I can set the FSB to 124MHz for now which gives me 2108MHz which should be fine based on other FSB/multi combinations I’ve done.

My CPU is a 2600+ Barton by the way. Stock 166x11.5 (1916.67MHz) but is an early one so is unlocked. I was wondering if a mobile CPU would be any better in terms of compatability. But based on what you’ve found, probably not!

FullYes wrote on Yesterday, 19:45:

Shiftyy wrote on Yesterday, 12:57:

Just an update: […]
Show full quote

Just an update:

I have finished configuring the PIN mod. I ended up doing the 5-4 PIN mod as described on this webpage:
https://www.emboss.co.nz/amdmults/

And here is a pic of the PIN mod:

One weird behavior I encountered, after completing the 5-4 PIN mod, I could get it to reliably post when set to 100Mhz FSB. However, when set to 133Mhz FSB, I ran into issues.

The only multiplier that worked with 133Mhz FSB was 9x. Any lower, or higher would result in no post. Strange behavior. Again, 100Mhz FSB was fine, and I could set it to pretty much any multiplier. But with 133Mhz FSB, it would only post when the multiplier is set to 9x.

Anyway, a 9x multiplier, at 133Mhz FSB, with the 5-4 PIN mod gives me 2.266Mhz, which is perfectly fine and I am very happy with that.

Only downside is this CPU isn’t stable at 2266MHz at stock volts

Yeah I had the same issue. My Mobile 2500+ stock volts are 1.45v but had to increase it to v1.55v for it to be stable (So far. Haven't done enough benchmark/testing). The desktop variant runs at 1.65v so I think I should be okay. I got a good PSU (Recapped Antec Truepower II 430w) and cooler (Zalman 7000B), so I'm pretty confident with the slight overclock.

Since your 2600+ is the desktop variant, I assume you're already running at 1.65v?

Anyway, I'm glad my experience was somewhat helpful and that you have managed to get it working.