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Message from discussion MG 486 emon ohjeet
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Reino Putsela  
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 More options Jan 11 1998, 3:00 am
Newsgroups: sfnet.atk.laitteet.pc
From: re...@nettilinja.fi (Reino Putsela)
Date: 1998/01/11
Subject: Re: MG 486 emon ohjeet
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On 4 Jan 1998 07:11:32 GMT, jo...@iki.fi (Joose Vettenranta) wrote:

>Joose Vettenranta <jo...@iki.fi> wrote:

>>tuli tuossa ostetuksi 486-emo, mutta mitään docuja ei tullut mukana. Eli
>>onkos kellään tietoa jostain URLista, mistä löytyis tuolla docut, että
>>tietäis mitä mikin jumpperi tekee.

Hei jos emosi on sama kuin minun, niin tässä vähän apuja.
MG-486 piirisarja UMC82C480 AMI-Bios VLB-väylä.
Manuaali on, jos satut tarvitsemaan lisä tietoja.
Jumpers and Connectors

Keyboard inhibit / Power LED

pin I           LED +
pin 2           N/C    
pin 3           Gnd    
pin 4           Keyboard inhibit
pin 5           Gnd
Description

Turbo Switch
J3: Open for high speed operation(Cache On).
J3: Close for full speed operation(Cache Off).

Turbo Indicator
J4                      Description
pin I                   LED -  
pin 2                   LED +

Speaker Connector
J2                      Description
pin I                   Speakers Signal
pin 2                   N/C
pin 3                   Gnd
pin 4                   Vcc
Hardware Reset
J5 . Close = Reseting the whole system (cold boot).
 J5 . Open = Normal operation.

J6      Description
pin1    battery V+
pin2    N/C
pin3    Gnd
pin4    Gnd

On board Battery Switch
W14: Closed for using on board battery
W14: Opened for using external battery

Display Card Selection
W1: Close for CGA Display
W!: Open for MGA,EGA and VGA Display card

CPU Type Selection
486DX,DX2
W2: 1,2 & 3,4 Close
W3: 1,2 Close

486SX
W2: 2,3 Close
W3: Open

487SX
W2: 1,2 & 3,4 Close
W3: 2,3 Close

Keyboard connector
KB1     Description

pin1    keyboard clock
pin2    Keyboard Data
pin3    N/C
pin4    Gnd
pin5    Vcc

Power Connector
CN1     Description
pin1    power good
pin2    Vcc
pin3    +12 V
pin4    -12 V
pin5    Gnd
pin6    Gnd

CN2     Description
pin1    Gnd
pin2    Gnd
Pin3    -5 V
pin4    Vcc
pin5    Vcc
Pin6    Vcc

Cache Memory Size Select
        W13     W12     W11     W10     W9      W8      W7      W6
64KB    1-2     1.2     open    1-2     open    open    open    open    
128KB   2-3     1-2     1-2     2-3     close   open    close   open
256KB   2-3     2-3     2-3     1-2     close   close   close   close


 
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