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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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 Posted: Mon Sep 28, 2020 7:21 pm Post subject: CPU Shack: Oddball 486 Socket 3 VLB Board |
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Socket 3
SiS 85C471/85C407 Chipset
2x 72 pin SIMM Slots
4x 30 pin SIMM Slots
Cache (which may be the awesome fake stuff lol) - seems to support up to 1M though
Coincell battery (yay)
$20 and its yours
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debs3759
Joined: 18 Jan 2006
Posts: 9477
Location: Northampton, Divided Kingdom
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| Posted: Mon Sep 28, 2020 7:29 pm Post subject: |
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I'll take it. Just need to buy some sockets for the cache (and a VLB io card)
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CPUShack
Joined: 16 Jun 2003
Posts: 34259
Location: State of Jefferson, USA
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Tue Sep 29, 2020 12:05 am Post subject: |
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You might want to buy some headers as well. The higher cache sizes probably has some soldered shut jumper pads.
Might as well buy a DIP-20 keyboard controller socket as well. As this board has an AWARD BIOS, it is probably fairly straight forward to get native PS/2 mouse support on it.
Good price.
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ph4nt0m
Joined: 01 Jan 2018
Posts: 812
Location: Europe
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| Posted: Tue Sep 29, 2020 1:04 am Post subject: |
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The cache and BIOS chips are all soldered. The board is also missing a VRM, 14MHz oscillator and all jumpers.
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feipoa
Joined: 08 Mar 2011
Posts: 553
Location: Canada
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| Posted: Tue Sep 29, 2020 1:13 am Post subject: |
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That is curious about the missing oscillator. Perhaps the CLKGEN IC has some built-in reference clk that it is using? I'm guessing that the VIA DIP-14 on the top centre is the CLKGEN.
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ph4nt0m
Joined: 01 Jan 2018
Posts: 812
Location: Europe
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| Posted: Tue Sep 29, 2020 10:56 am Post subject: |
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That's a VIA VT8235N. It takes a standard 14.318MHz input.The VRM is an LDO of LT1085 style.
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