VOGONS


First post, by moog

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The Lin-Lin adapter does not come with any documentation whatsoever except for 3 configs printed out on the back of the box. Pictures available on the Internet are really blurry, so there's not much to get out there. Unfortunately, I don't have my box either, so the following is what I've managed to find out on my own.

So without further ado:

B8-B9 - sets stock FSB to 133MHz
B7-B8 - sets stock FSB to 100MHz

Base voltage: 1.3V
A8-A9 - adds 0.05V
A5-A6 - adds 0.2V
A2-A3 - adds 0.1V
B2-B3 - adds 0.4V
B5-B6 - crashed my motherboard, probably adds 0.8V

So the resulting voltages allow us to:
- put a Tualatin CPU in any motherboard (B8-B9, then A8-A9 + A2-A3)
- put a Coppermine CPU in any motherboard (I'd imagine you'd go for voltages around 1.6-1.75V and maybe 133MHz FSB if the CPU supports it)
- tweak these settings to accomodate our clock speed

Audigy 2 ZS in FreeDOS
LinLin adapter documentation
+ various capacitor list threads

Reply 1 of 7, by snufkin

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Maybe the voltage jumpers are as on some other 370 stuff, where the 5th jumper resets the base voltage to 2V (sort of) and multiplies the jumpers by two so they start going up in 0.1V steps. There's a table here for a slocket:
https://images.anandtech.com/old/CPU/Intel/pe … locket2inst.jpg

Reply 4 of 7, by mockingbird

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I just can't get my PIII-S 1.4 stable with it on my P2B-S (on an Abit Slotket III)... Someone else here says the board is fine (though I have not seen acceptable qualification of his testing), but while Prime 28 passes fine, Prime 27 has a weird failure state where the tests start "passing" seconds apart after a while. Another weird symptom is strange I/O errors with my Ultra133 TX2... The Korean adapter (bought separately and installed personally) did not work (through no fault of my own - I followed the instructions to a tee... He sent me a newer revision with optional resistors on the back, so I need to get back to him after doing some voltage or resistance tests with it running to see what's going on and reporting to him).

But I'm getting a P3B-F soon (snagged it for $10), so we'll see if the Lin-Lin works well there...

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(Decommissioned:)
7ivtic.png

Reply 5 of 7, by moog

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mockingbird wrote on 2022-01-11, 19:41:

I just can't get my PIII-S 1.4 stable with it on my P2B-S (on an Abit Slotket III)... Someone else here says the board is fine (though I have not seen acceptable qualification of his testing), but while Prime 28 passes fine, Prime 27 has a weird failure state where the tests start "passing" seconds apart after a while. Another weird symptom is strange I/O errors with my Ultra133 TX2... The Korean adapter (bought separately and installed personally) did not work (through no fault of my own - I followed the instructions to a tee... He sent me a newer revision with optional resistors on the back, so I need to get back to him after doing some voltage or resistance tests with it running to see what's going on and reporting to him).

But I'm getting a P3B-F soon (snagged it for $10), so we'll see if the Lin-Lin works well there...

Mine's also unstable on 133MHz. Tested with Abit VP6 and Epox D3VA. Booting up the Linux kernel can cause panics even before rootfs is mounted. Sometimes it can't even properly read what's on the IDE drive. It's all very weird. I read it's because the voltage is too low, but I've gone from everything from 1.3V to 1.6V and it's generally the most stable, but still unstable, at around 1.5V. It can't even rebuild the kernel without segfaulting at some point.

Edit: I've noticed that it gets more and more unstable to the point the BIOS won't even POST as the temperature increases. The starting point for stability problems seems to be around 55C. It's no surprise now. At 100MHz FSB and 1.45V, my dual Tualatins are at 52C under full load, but at 133MHz FSB they quickly and easily exceed 55C and may even go into 60C, which is already a dangerous temperature for any Pentium 3.

Audigy 2 ZS in FreeDOS
LinLin adapter documentation
+ various capacitor list threads

Reply 6 of 7, by mockingbird

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moog wrote on 2022-01-11, 23:08:

Did you rule out capacitors on the motherboard and in the PSU?

I swapped the clockgen on my P2B to an ICS9250CF which gives the fourth bit in the jumper block for 133Mhz... First I thought my IC was counterfeit, but yesterday I installed an authentic one, and the problem persists.

So I also tested a coppermine 133Mhz FSB chip, that one works fine.

Oh well if this doesn't work out with the P3B I think I'll truly ditch it for a KT133A build.

jw0vu3.png
(Decommissioned:)
7ivtic.png

Reply 7 of 7, by moog

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mockingbird wrote on 2022-01-12, 02:09:
Did you rule out capacitors on the motherboard and in the PSU? […]
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moog wrote on 2022-01-11, 23:08:

Did you rule out capacitors on the motherboard and in the PSU?

I swapped the clockgen on my P2B to an ICS9250CF which gives the fourth bit in the jumper block for 133Mhz... First I thought my IC was counterfeit, but yesterday I installed an authentic one, and the problem persists.

So I also tested a coppermine 133Mhz FSB chip, that one works fine.

Oh well if this doesn't work out with the P3B I think I'll truly ditch it for a KT133A build.

Coppermine 133MHz works fine, although, I must admit these CPUs suck for their own reason - not having an IHS makes it really difficult to fit Connectland heatsinks.

Abit VP6 is almost 100% recapped into solid state capacitors. Epox D3VA is left in its vanilla state right now. Both boards have the same problems with Tualatins running at 133MHz.

Audigy 2 ZS in FreeDOS
LinLin adapter documentation
+ various capacitor list threads