Shponglefan wrote on 2024-08-30, 14:03:

PD2JK wrote on 2024-08-30, 13:07:

Been busy on a BX133-RAID board, how does this look.🤔

It looks like you need new capacitors. 😉

Yeah... and a resistor and capacitor (?) array.
Edit; R27 is also missing.. joy. I need a donor board.

It's not just that they're missing. It looks like someone deliberately removed them...

Kahenraz wrote on 2024-08-30, 15:21:

It's not just that they're missing. It looks like someone deliberately removed them...

Sorry I removed the resistor array, before the picture was taken, it was broken in two pieces and could barely/luckily read a 330 marking on it. For the other two components, I would have to gamble or find some high-res picture I guess.

nhattu1986 wrote on 2024-08-30, 11:41:

those pentium 2/3 does not required much cooling and they can be run passive if the case having a good air flow. and yes, with t […]
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Ozzuneoj wrote on 2024-08-30, 04:31:

Wow, I don't know much about SBCs but I have never seen a Slot 1 SBC before. Those things are insane looking on the CPU side! […]
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nhattu1986 wrote on 2024-08-30, 02:31:

Yesterday, the passive backplane for sbc board i ordered had been arrived so i start testing my two sbc board https://i.imgur.co […]
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Yesterday, the passive backplane for sbc board i ordered had been arrived so i start testing my two sbc board

the socket 8 one is pci-p6vt according to the bios post screen, for some reason, it won't boot with pentium overdrive but work fine with regular 256k pro, bios image is non-existence and there zero document about it. The battery somehow still hold the charge.
the slot1 one is a P228BX, the battery sadly is depleted and will need to repair. I'm still able to find the manual for this one on archive.org and for some reason, the guide to connect the soft start is not in original document but it in document for later board 😁

Wow, I don't know much about SBCs but I have never seen a Slot 1 SBC before. Those things are insane looking on the CPU side!

(Images pulled from ebay)

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I just picture the engineers of those flat Slots saying "They are getting rid of sockets and using what? And they want them where? In WHAT orientation? ... uuhhggg..."

I wonder if you could use a cooler off of some modern GPU to cool those... maybe a 9800GX2 or GTX 690 cooler would work best? 🤣

those pentium 2/3 does not required much cooling and they can be run passive if the case having a good air flow.
and yes, with the cpu and cooler attach, the board became quite a chonky boy and it cover the nearby slot

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Very cool!

Also, my joke about the GPU cooler wasn't very clear I guess, sorry. I know these don't put out much heat 😀 (20-35 watts each maybe?). I just meant that because of the orientation and placement of the CPUs that maybe a dual GPU cooler (9800GX2 and GTX 690) with two contact areas would line up to cool both chips. You'd open the system and it'd appear to have an upside-down GTX 690 stuck in a backplane with no other components, and yet running Windows NT or something... 🤣

PD2JK wrote on 2024-08-30, 14:16:

Yeah... and a resistor and capacitor (?) array. Edit; R27 is also missing.. joy. I need a donor board. […]
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Shponglefan wrote on 2024-08-30, 14:03:

PD2JK wrote on 2024-08-30, 13:07:

Been busy on a BX133-RAID board, how does this look.🤔

It looks like you need new capacitors. 😉

Yeah... and a resistor and capacitor (?) array.
Edit; R27 is also missing.. joy. I need a donor board.

The attachment DSC_1505.JPG is no longer available

Don't get too disheartened, it's just a standard PLL and perhaps the datasheet for it can help. Checking it out, looks like that resistor array goes to a bunch of SDRAM clock signals and on the last page it shows a demo schematic with 22 ohm resistors and 20 picofarad capacitors on each of those.
Checking out similar boards it looks like the Asus P2B uses the same PLL and if you have one you could pull parts off that to check. A good picture of the BX133 shows that capacitor pack has purple-ish capacitors on that spot which is about right for picofarad capacitors from what I saw fixing a voodoo card recently.

What pin does your broken / missing R27 hook to?

I'm doing little in the way of retro stuff today, taking a break from trying to fix my Caching Tech N286 motherboard which after replacing the 82C206 socket then wouldn't post 90% of the time until I worked out that the 32khz frequency that was supposed to go into the 82C206 / RTC / CMOS was hooked to an adjacent pin with a solder bridge underneath the socket but not on the pins side. Solved that by sucking out the solder so there was a hole on those 2 pins, then injected flux into the holes and heated it. That cleared the bridge and it boots further but wouldn't post, now I've worked out that the ISA bus has D0 stuck high.
The 286 computers are kinda fun to troubleshoot compared to later boards since they're all cloning the IBM 5170, this board has a Chips CS8221 or NEAT chipset. But the supersoft bios works on it and I have a CGA clone card but no TTL capable display so using that adapter and composite I can get meaningful diagnostics through composite video output 😀

I found this though, I can't afford it but what on earth is this thing, I want it:

How does it even exist?

PD2JK wrote on 2024-08-30, 14:16:

Yeah... and a resistor and capacitor (?) array.
Edit; R27 is also missing

Likely C100=10pF

Thermalwrong wrote on 2024-08-31, 01:50:

I found this though, I can't afford it but what on earth is this thing, I want it:

The attachment what-are-you.jpg is no longer available

How does it even exist?

I have one of these. If it is identical to mine, it is a mobile Celeron 366/66 SL3C7 soldered onto a BGA-to-Socket 370 adapter.

Damn shipping companies...
I got a dell inspiron 8000, i wanted a good retro laptop that i could just connect to the main TV so that i could play on the sofa BUT they broke one of the corners of the case, everything works mind you but it's not in the best visual shape, i don't even feel like doing some extensive repair work.
What are the options? find a broken dell and use that case? buy a custom mini case for the insides and create something cool looking? what else?

Do like me, have an accidental collection of laptops that could be fixed up to be worth $150 if you only spent $300 on parts 🤣

I guess try for one with a busted screen for cheap though.

I had a win today. Found an S3 based ISA video card called Advantix GraphicsEngine 32. Up to 2mb memory and some form of early acceleration on an ISA card. Got additional memory for the card which did not work. Realized I could test the chips in an old trident card, did, and found the bad chip. Will get more memory on the way.

It works, generic S3 drivers work, it kills XTIDE if I enable 16bit mode on the card jumpers.

A couple years ago I bought a non-working ASUS ISA-486SI. Putting a post card in it wouldn't even register. It had battery damage, but it didn't look like any traces were destroyed. Today I looked at it under my soldering microscope after trying with the POST card again, and found one trace between the RTC CMOS RAM and some random 74 series logic that was broken. Tested for continuity to make sure, then wired a small jumper. It then started on the first try. I used some vinegar and baking soda in the area where the battery had been removed and then cleaned it. Soldered a battery blaster on. Replaced the BIOS with a y2k compliant MR BIOS that had been uploaded for the SiS 85C461 chipset*. It recognized and supports the SiS 85c460 chipset just fine. After that I experienced some memory issues while testing and it turned out one of the cache chips was faulty, so I swapped out the set. Now I have a functioning ASUS ISA-486SI. I want to see if I can get it to run stable with a 486DX-50. Right now I have an Evergreen 5x86-133 upgrade module in it, works fine. I am using this board as a test environment for an ISA card I am designing.

MR-BIOS file I used: https://archive.org/details/dsc-0888
More on this board: https://theretroweb.com/motherboards/s/asus-isa-486si

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

That's seriously cool!

Add an RJ11 jack and it's almost a modem. 😉

zwrr wrote on 2024-09-01, 08:33:

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Chann […]
Show full quote

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

The attachment 111_mini.jpg is no longer available

The attachment 222_mini.jpg is no longer available

I don't understand this mod. Don't the lights already show which channel is active? What does it cause the synthesizer tondo differently?

zwrr wrote on 2024-09-01, 08:33:

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Chann […]
Show full quote

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

The attachment 111_mini.jpg is no longer available

The attachment 222_mini.jpg is no longer available

Wow, tidy mod. Did you have to drill holes in the faceplate for the LEDs? If so, that's a nice outcome 😀

Absinthminded64 wrote on 2024-08-31, 22:40:

I had a win today. Found an S3 based ISA video card called Advantix GraphicsEngine 32. Up to 2mb memory and some form of early acceleration on an ISA card. Got additional memory for the card which did not work. Realized I could test the chips in an old trident card, did, and found the bad chip. Will get more memory on the way.

It works, generic S3 drivers work, it kills XTIDE if I enable 16bit mode on the card jumpers.

The attachment 20240831_181904.jpg is no longer available

That's one fancy card, hope the 2MB upgrade works out 😀 It even seems to have a true-color DAC on it

Kahenraz wrote on 2024-08-31, 05:24:

Thermalwrong wrote on 2024-08-31, 01:50:

I found this though, I can't afford it but what on earth is this thing, I want it:

The attachment what-are-you.jpg is no longer available

How does it even exist?

I have one of these. If it is identical to mine, it is a mobile Celeron 366/66 SL3C7 soldered onto a BGA-to-Socket 370 adapter.

Yeah that's it, where did it come from? I've never seen one of the mobile P3 packages adapted to a desktop socket.

Thermalwrong wrote on 2024-09-01, 18:31:

Yeah that's it, where did it come from? I've never seen one of the mobile P3 packages adapted to a desktop socket.

Judging by the occasional Linus Tech Tips video I've clicked on over the years, it's apparently a common thing in China to repurpose SKUs that way. They also make ATX- or ITX-family motherboards with soldered-on laptop CPUs for similar "We can get a pallet of these parts cheaply. Let's try to make more customers for them" reasons.

It wouldn't surprise me if that was created to fill the Cyrix segment of the market.

Clean and retrobright this LG Studioworks 1505s monitor, also changed the VGA cable and done some adjustments to the Focus, Screen and Subcon potentiometers.

Kahenraz wrote on 2024-09-01, 13:47:

zwrr wrote on 2024-09-01, 08:33:

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Chann […]
Show full quote

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

The attachment 111_mini.jpg is no longer available

The attachment 222_mini.jpg is no longer available

I don't understand this mod. Don't the lights already show which channel is active? What does it cause the synthesizer tondo differently?

The original SC-55ST front panel only has one MIDI signal LED, I installed an additional 16 LEDs to display the status of each MIDI channel.

Thermalwrong wrote on 2024-09-01, 18:31:

Wow, tidy mod. Did you have to drill holes in the faceplate for the LEDs? If so, that's a nice outcome :) […]
Show full quote

zwrr wrote on 2024-09-01, 08:33:

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Chann […]
Show full quote

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

The attachment 111_mini.jpg is no longer available

The attachment 222_mini.jpg is no longer available

Wow, tidy mod. Did you have to drill holes in the faceplate for the LEDs? If so, that's a nice outcome 😀

Absinthminded64 wrote on 2024-08-31, 22:40:

I had a win today. Found an S3 based ISA video card called Advantix GraphicsEngine 32. Up to 2mb memory and some form of early acceleration on an ISA card. Got additional memory for the card which did not work. Realized I could test the chips in an old trident card, did, and found the bad chip. Will get more memory on the way.

It works, generic S3 drivers work, it kills XTIDE if I enable 16bit mode on the card jumpers.

The attachment 20240831_181904.jpg is no longer available

That's one fancy card, hope the 2MB upgrade works out 😀 It even seems to have a true-color DAC on it

Kahenraz wrote on 2024-08-31, 05:24:

Thermalwrong wrote on 2024-08-31, 01:50:

I found this though, I can't afford it but what on earth is this thing, I want it:

The attachment what-are-you.jpg is no longer available

How does it even exist?

I have one of these. If it is identical to mine, it is a mobile Celeron 366/66 SL3C7 soldered onto a BGA-to-Socket 370 adapter.

Yeah that's it, where did it come from? I've never seen one of the mobile P3 packages adapted to a desktop socket.

Yes, drilled an extra 16 holes for the channel status LEDs, cut the pins from the internal MDI socket and connected them to the MIDI IN and THRU of the channel board respectively.

zwrr wrote on 2024-09-01, 22:12:

Kahenraz wrote on 2024-09-01, 13:47:

zwrr wrote on 2024-09-01, 08:33:

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Chann […]
Show full quote

Add channel status lights to the ST-55ST panel to achieve an effect similar to the ST-88ST, by installing the BulkyMIDI-32 Channel board inside the ST-55ST.
https://github.com/tebl/BulkyMIDI-32/tree/mai … 2%20Channel%202

The attachment 111_mini.jpg is no longer available

The attachment 222_mini.jpg is no longer available

I don't understand this mod. Don't the lights already show which channel is active? What does it cause the synthesizer tondo differently?

The original SC-55ST front panel only has one MIDI signal LED, I installed an additional 16 LEDs to display the status of each MIDI channel.

Oh! It looks so good that I didn't realize those were all custom LEDs! Good job.