VOGONS


First post, by Turbo ->

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I'm having trouble setting up the jumpers of 486 motherboard.

I have DC chips motherboard, but can't find any manual for it. The CPU I am installing is an Intel i486 DX2 A80486DX2-66. As I checked, this is a 5V CPU. I am afraid that I will damage the board or the CPU with wrong jumper settings. Are the jumpers set OK? How about those red jumpers (for voltage). Any help would be appreciated.

Reply 1 of 6, by derSammler

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Voltage is set to 3.3V. For 5V, move all three jumpers of JP26 from 1-2 to 2-3.

All jumpers are described on the board, so why do you need the manual?

Reply 2 of 6, by Turbo ->

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Thank you Sammler. This is my first time setting the jumpers like this, so I was unsure about it.

Reply 3 of 6, by Predator99

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Think the reds also 5V for Intel DX2? But you wont damage anything when trying 3.3.
Also very low risk of damage when selecting wrong frequency for a short time...

I have the same:
search.php?keywords=PCCHIPS+CHIP+16+CHIP+18+9430-AS+9432-AS

As far as I remember it was running with the settings shown on the picture...

Reply 4 of 6, by Turbo ->

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I've moved the red jumpers to 5V and it works. Thanks. Now I must find a nice heatsink.

IMG_8502.JPG

Are there any other jumpers on the board I should be concerned about?

I dont know what do jumpers JP 6, JP7 and JP 8 mean? (see picture).

IMG_8503.JPG

As I checked, this CPU has clock 2x, so I placed the jumper on JP 31 (2-3). I belive that is correct? (see picture)

IMG_8504.JPG
Predator99 wrote:

Also very low risk of damage when selecting wrong frequency for a short time...

Please tell me which jumpers are for frequency?

Reply 6 of 6, by Turbo ->

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CuPid wrote:

Here is the doc you are looking for :

Thanks!