mR_Slug wrote on 2020-05-13, 11:14:

Also a (public domain) picture of the Model 401:

The attachment Model-401.jpg is no longer available

Are Intel Model 401 and iSBC 386 boards can work with normal AT power supply or need a special one?

The ones I have played with work fine with standard PSUs. The additional power connector is for additional 5V. I worked out the pinout for it and modified a PSU with the additional power connector on one of my boards. Then that PSU decided to die on me:-(. Anyway it is not necessary.

The 401 i have not booted, as i don't have the memory card. IIRC the additional set of 3 power connectors on the top right are just connected to the 3 on the top-ish left.

Thank you. I have an Intel SBC386AT25F04 but not boot. I thought it might be not boot because it needs a special PSU, but then there is the problem with the motherboard itself. These motherboards look really good.

It may only take 256K simms, also check the jumper settings for the RAM. The large slots take RAM cards, and you have to configure these via the jumper settings too. Also probably best to try standard RAM setting instead of FPM.

Jumpers:
http://web.archive.org/web/20040827214754/htt … -25/jumpers.htm

Failing that, i guess it is time for a POST code diag card.

mR_Slug wrote on 2020-09-10, 18:35:

It may only take 256K simms, also check the jumper settings for the RAM. The large slots take RAM cards, and you have to configu […]
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It may only take 256K simms, also check the jumper settings for the RAM. The large slots take RAM cards, and you have to configure these via the jumper settings too. Also probably best to try standard RAM setting instead of FPM.

Jumpers:
http://web.archive.org/web/20040827214754/htt … -25/jumpers.htm

Failing that, i guess it is time for a POST code diag card.

Thanks, I have tried to test without memory but with POST code diag card, but the card not powered at all and PSU has turned of itself. This is why I have thought that the borad needs special PSU.

Model 401 motherboard needs more information too. This board relies on at least 2 cards, one to have memory and one for making ISA bus to work since there is no 82C206, or DMA, interrupt ICs, timer
etc.

Have photos of these cards for the model 401 motherboard?

Cheers,

Gona wrote on 2020-09-10, 11:31:

Thank you. I have an Intel SBC386AT25F04 but not boot. I thought it might be not boot because it needs a special PSU, but then there is the problem with the motherboard itself. These motherboards look really good.

Please respond, do you have photos of your board and their cards?

Cheers,

Unfortunately I have no cards for the motherboard.

gerwin wrote on 2013-08-03, 00:03:

Came across another intel microATX motherboard: MU440EX CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz) Ch […]
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Came across another intel microATX motherboard:
MU440EX
CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz)
Chipset: Intel 82440EX AGPset, 66 MHz host bus speed
Slots: 1 ISA, 2 PCI
Audio: Yamaha YMF 740-V
Graphics: ATI Rage Pro Turbo AGP with 2 MB SGRAM (option for 4MB?)

Bit of a necro but got hold of one of these myself today - nostalgia as I worked on one at the office (at Packard Bell) back in the day. So of course looking to see what more we can tell.

Mine came with 4MB SGRAM, so if you only have 2, 4 is definitely an option.

The PLL is an IC Works W42S51-01, which is unfortunately a fixed 66MHz FSB/AGP and 33MHz PCI only device.
CPU VRM is a Semtech SC1182CS - which is interesting, this VRM supports VIDs down to 1.3V - suggesting that Coppermine or even Tualatin might be possible - although I have doubts about how much current it can supply stably at those low voltage.

I'll attach the SC1182 datasheet for future reference.

Will be playing around with this one over the next few days, see if I can get a Coppermine CPU to run on it...

dionb wrote on 2024-12-25, 13:33:

Bit of a necro but got hold of one of these myself today - nostalgia as I worked on one at the office (at Packard Bell) back in […]
Show full quote

gerwin wrote on 2013-08-03, 00:03:

Came across another intel microATX motherboard: MU440EX CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz) Ch […]
Show full quote

Came across another intel microATX motherboard:
MU440EX
CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz)
Chipset: Intel 82440EX AGPset, 66 MHz host bus speed
Slots: 1 ISA, 2 PCI
Audio: Yamaha YMF 740-V
Graphics: ATI Rage Pro Turbo AGP with 2 MB SGRAM (option for 4MB?)

Bit of a necro but got hold of one of these myself today - nostalgia as I worked on one at the office (at Packard Bell) back in the day. So of course looking to see what more we can tell.

Mine came with 4MB SGRAM, so if you only have 2, 4 is definitely an option.

The PLL is an IC Works W42S51-01, which is unfortunately a fixed 66MHz FSB/AGP and 33MHz PCI only device.
CPU VRM is a Semtech SC1182CS - which is interesting, this VRM supports VIDs down to 1.3V - suggesting that Coppermine or even Tualatin might be possible - although I have doubts about how much current it can supply stably at those low voltage.

I'll attach the SC1182 datasheet for future reference.

Will be playing around with this one over the next few days, see if I can get a Coppermine CPU to run on it...

Would be interested to see...furthest I ever pushed either of mine (1 intel + 1 PB) was a Celeron 533 -

Also, has anyone ever come across the full intel microtower version...

Intel boards in the house include...

Intel Tucson 430HX board in a Micron mid tower, runs alright with a P233MMX.

Intel Advanced / Marl, dirty and abused looking I picked up years ago, but never ran yet, needs a lot of cleaning and header unbending.
_______

Less retro but getting there...

D101GGC 775/DDR P4 board .. unusual as it's not an Intel chipset.
DG965SS socket 775 board, Core2 and quad? capable.
Atom Johnstown board.
DG45FC ITX 775 in an Apex shoebox.

All these seem pretty solid, but boring without many options to tune, overclock or upgrade past what is "allowed".

Just coming on my radar though, a listing I am keeping an eye on is a 440BX Seattle II board, can't figure if I want it. Well, don't want it bad enough to pay current "normal" BX board pricing, waiting for listing to get stale and drop price. Anyhoo. figure that's gonna be much the same, solid, boring, optionless. I heard they only officially go to 850 Coppermine, I guess because they wanted you on shiny new 815.

Nice ! All I have in older Intel is Intel Advanced/ATX, Intel VS440FX, Intel MU440EX, Intel D865GLC and Intel D865PCD.
Just checked and the MU440EX has only 2Mb video ram....

PC Hoarder Patrol wrote on 2024-12-25, 22:27:

dionb wrote on 2024-12-25, 13:33:

Bit of a necro but got hold of one of these myself today - nostalgia as I worked on one at the office (at Packard Bell) back in […]
Show full quote

gerwin wrote on 2013-08-03, 00:03:

Came across another intel microATX motherboard: MU440EX CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz) Ch […]
Show full quote

Came across another intel microATX motherboard:
MU440EX
CPU: a single Pentium II (<=333MHz) or Celeron processor (<=400MHz)
Chipset: Intel 82440EX AGPset, 66 MHz host bus speed
Slots: 1 ISA, 2 PCI
Audio: Yamaha YMF 740-V
Graphics: ATI Rage Pro Turbo AGP with 2 MB SGRAM (option for 4MB?)

Bit of a necro but got hold of one of these myself today - nostalgia as I worked on one at the office (at Packard Bell) back in the day. So of course looking to see what more we can tell.

Mine came with 4MB SGRAM, so if you only have 2, 4 is definitely an option.

The PLL is an IC Works W42S51-01, which is unfortunately a fixed 66MHz FSB/AGP and 33MHz PCI only device.
CPU VRM is a Semtech SC1182CS - which is interesting, this VRM supports VIDs down to 1.3V - suggesting that Coppermine or even Tualatin might be possible - although I have doubts about how much current it can supply stably at those low voltage.

I'll attach the SC1182 datasheet for future reference.

Will be playing around with this one over the next few days, see if I can get a Coppermine CPU to run on it...

Would be interested to see...furthest I ever pushed either of mine (1 intel + 1 PB) was a Celeron 533 -

Afraid I'm not going to be able to push any further for now.

I have five slockets, two PPGA only, two FC-PGA and one FC-PGA2. The PPGA do their job, but that's just Mendocino and we already knew that worked fine. Unfortunately it looks like my one FC-PGA2 (an Abit Slotket III) has major troubles - the board doesn't even power on with that thing in place, I'm suspecting a bad short :'( and the other, an MSI MS-6205 Master, is AWOL. Also not touching the FC-PGA2 adapter in my prize system.

However given behaviour with Slot 1 CPUs, it's clear enough what to expect:
- Slot 1 Mendocino works fine
- Slot 1 Deschutes works fine at 66MHz FSB - including CPUs that indicate 100MHz on pin B21 - my P2-400 runs at 266MHz
- Slot 1 Katmai and Coppermine fail, regardless of FSB. My POST card indicates 38 at the time.
- Slot 1 Klamath P2 300 is recognized as "Pentium 2 133MHz" -and is even slower than that would suggest. PB documentation says that P2 300 is not supported even though P2 266 and P2 333 are. No idea what's going on here, but this doesn't look like a viable option unless you want to underclock 😉

38 is supposed to be external cache auto-sizing (according to Phoenix PCI BIOS docs) or shadow system BIOS ROM (Phoenix 4.0), but given they don't occur with Deschutes but do with Katmai and Coppermine, it doesn't care about pin B21 and it's also not a voltage issue, so it looks like an unknown CPU being rejected if the BIOS doesn't have the microcode for it.

This is with MU440EX BIOS 4M4UE0X3.11A.0002.P02. There are a lot of other versions out there, with 4M4UE0X3.11A.0005.P04.9812141104 looking like the most recent, although 4M4UE0X1.86A.0012.P11.9810021348 has a higher revision number if a lower date code - and may be for a different board revision (86A instead of 11A). Unfortunately all downloads are in the form of awful self-extracting floppy images, and my Gotek software is playing up again, so won't be doing any flashing anytime soon...