VOGONS


First post, by Linkintime

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The motherboard is a 486ip2v of unknown brand. I checked a few databases but haven't found it yet. There seems to be Cache slots but I'm not sure what would be compatible. I ended getting a 5x86 instead of a 486 dx2 66 but both would be great. Any suggestions on Cache? I'm hoping to put as much in as possible.

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Reply 1 of 10, by BitWrangler

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Looks like one of these or related models...
https://www.ultimateretro.net/en/motherboards/10125
Or one of bottom half of these
https://www.ultimateretro.net/en/motherboards … ufacturerId=548
Nothing looks exact, some of the Gateway ones are closer, maybe for another OEM.

Unicorn herding operations are proceeding, but all the totes of hens teeth and barrels of rocking horse poop give them plenty of hiding spots.

Reply 3 of 10, by Disruptor

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Warning!
As I have a Saturn II based motherboard too, I can say that DRAM modules have to be installed pair-wise. At least my board won't boot with a single DRAM module.

Reply 4 of 10, by Deksor

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Hello, could you please take a nice picture of your board and dump the bios for proper documentation on ultimateretro ? 😁

Trying to identify old hardware ? Visit Ultimate Retro - Project's thread The Ultimate Retro project - a stason.org/TH99 alternative

Reply 5 of 10, by luckybob

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I'm hoping to put as much in as possible.

That's what she said!
*laughs like a school child for 5 minutes, and stops when I see nobody else laughing*

But seriously. That board screams "ACER OEM". And the first board Bitwrangler posted looks right. Too many things line up.

It looks like you need 5x 256kbit sram chips. They are common enough on the ebay. Without going into reasons why, don't buy anything that comes out of China. NEW chips can still be bought: https://www.mouser.com/ProductDetail/Renesas- … MD%2FZNgZjhk%3D (i'm like 95% sure thats the right chip, dont take that link as gospel.)

It is a mistake to think you can solve any major problems just with potatoes.

Reply 7 of 10, by Linkintime

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"As I have a Saturn II based motherboard too, I can say that DRAM modules have to be installed pair-wise. At least my board won't boot with a single DRAM module."
Luckily I got a pair.
"Hello, could you please take a nice picture of your board and dump the bios for proper documentation on ultimateretro ? "
I plan to. I'm hoping there is a program to do it from a floppy.
"It looks like you need 5x 256kbit sram chips. They are common enough on the ebay. Without going into reasons why, don't buy anything that comes out of China. NEW chips can still be bought: https://www.mouser.com/ProductDetail/Renesas- … MD%2FZNgZjhk%3D (i'm like 95% sure thats the right chip, dont take that link as gospel.)"
Thanks looks great.
"I have had problems in my Saturn II based motherboard to run a write back processor.
Please try first with a write through 486."
Noooo! Bummer. I may be going back to a dx2-66 after all. If I do happen to get the 5x86 working I'll let you know.

Reply 8 of 10, by Disruptor

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Linkintime wrote on 2022-01-14, 18:06:

Noooo! Bummer. I may be going back to a dx2-66 after all. If I do happen to get the 5x86 working I'll let you know.

It is alive?
Great!
It has an outstanding memory performance.

Reply 9 of 10, by Disruptor

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HDDs? Since the onboard IDE connector is not soldered, I recommend to use a PCI IDE addon card or a PCI SCSI controller.

Warning. Your empty single SRAM socket may need another SRAM type than is needed for the 4 empty sockets.
Perhaps it is a dirty tag ram socket, perhaps it needs the same SRAM type than the soldered module. I cannot read the type on your photograph.

Reply 10 of 10, by Disruptor

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You can do me a favour please.
Please first try to run your board without additional cache modules at all.
Then install the 4 cache modules. Take care about the direction of the modules.

I'm not sure whether the 5th SRAM socket is a dirty tag ram socket or a socket to extend the cacheable area.
So Please leave it empty until you have read this topic and sent benchmark results to the current topic here.
486 L2: Comparison between Write-Through & Write-Back (with and without dirty tag ram)