Weird Intel 486 DX50 problem. \ VOGONS

Weird Intel 486 DX50 problem.

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First post, by 385387386

Posted on 2025-09-20, 12:16

385387386 Offline

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Rank: Newbie
Posts: 83
Joined: 2024-04-18, 03:04

I installed a 486 DX50, the jumper settings are all good, but when I turned on the computer, screen flickering, and show "GATE A20 ERROR" on the top left of the screen. I never seem this before, does anyone has idea about this? Thanks.

The motherboard M915i I used is perfectly with AMD X5 and Intel 486 DX4, and this board can works on 60MHz fsb stable.

Here, I post a photo shows what the error occurred when power on:

My first PC (1997)
IBM 6x86mx PR200
BIOSTAR M5ATA
16MB SDRAM

Now upgraded to Cyrix MII 291.5MHz (maybe PR400)

Reply 1 of 1, by Kouwes

Posted on 2025-09-20, 19:36

Kouwes Offline

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Rank: Member
Posts: 180
Joined: 2021-12-23, 06:51
Location: AT / NL

Load BIOS default (or fail-safe) settings. Worked for me

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