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80486 BIOS image collection

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Reply 180 of 187, by PC@LIVE

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I have some 486 motherboards, about four or five are working, all VLB, but I have as many to test (and repair), I don't know if you're interested, I'll put a couple of images, of the last two, which I should test soon (if they work) Unfortunately, at the moment I don't have a BIOS screen, nor can I make a copy of the BIOS (stored in the chip), but if you want I can make a list with the manufacturers and models of 486 that I have.

AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB

Reply 181 of 187, by PC@LIVE

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PC@LIVE wrote on 2023-12-26, 08:59:

I have some 486 motherboards, about four or five are working, all VLB, but I have as many to test (and repair), I don't know if you're interested, I'll put a couple of images, of the last two, which I should test soon (if they work) Unfortunately, at the moment I don't have a BIOS screen, nor can I make a copy of the BIOS (stored in the chip), but if you want I can make a list with the manufacturers and models of 486 that I have.

Image

AMD 286-16 287-10 4MB HD 45MB VGA 256KB
AMD 386DX-40 Intel 387 8MB HD 81MB VGA 256KB
Cyrix 486DLC-40 IIT387-40 8MB VGA 512KB
AMD 5X86-133 16MB VGA VLB CL5428 2MB and many others
AMD K62+ 550 SOYO 5EMA+ and many others
AST Pentium Pro 200 MHz L2 256KB

Reply 182 of 187, by tomaszdko

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#: 162
Manufacturer/Identifier: SOYO 025K0
Chipset: 85C407 , 85C471
BIOS/Version: AWARD
BIOS ID : 09/26/94-SIS-85C471B/E/G-2C4I9S23-00

The attachment 20231226_131147.jpg is no longer available
The attachment AA.jpg is no longer available

Images : W27C512

The attachment W27C512@DIP28.rar is no longer available

Reply 183 of 187, by tomaszdko

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#: 163
Manufacturer/Identifier: UM4981AIO V1.3
Chipset: UM8498F , UM8672F , UM8496F , FDC37C665GT , UM82C865F
BIOS/Version: PHOENIX
BIOS ID : ???

The attachment 20231226_131209.jpg is no longer available
The attachment AA.jpg is no longer available

Images : W27C512

The attachment W27C512@DIP28.rar is no longer available

Reply 185 of 187, by Timpa83

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Zalog wrote on 2021-04-07, 13:01:
Yes unfortunately it requires a fair degree of disassembly - fortunately I took one in the middle of an upgrade so if you don't […]
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evasive wrote on 2021-04-07, 12:36:

@Zalog: Could you make a picture without the metal support in the middle? Or does that require full disassembly?

Yes unfortunately it requires a fair degree of disassembly - fortunately I took one in the middle of an upgrade so if you don't mind shots of it that are slightly less clear (a bit harder to read the chips at the VGA end of the board) and in non-original condition (added cache chips, overdrive + extra ram) - find attached

PC9486_Upgrade.JPG

Edit: BIOS String is: 40-0100-001131-00111111-111192-UMC480

Hi.

does your L2 cache work with the Pentium OD cpu ?
cant get mine to work with L2 with a 486DX2 cpu it works perfect.

Reply 186 of 187, by Schule04

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#: 165
Manufacturer/Identifier: Shuttle HOT-419 VLB
Chipset: OPTi 82C895
BIOS/Version: AMI Winbios
BIOS chip: ST M27C512

https://theretroweb.com/motherboards/s/shuttle-hot-419

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The attachment Shuttle-HOT-419-VLB(M27C512@DIP28).zip is no longer available

Reply 187 of 187, by analog_programmer

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#:166
Manufacturer/Identifier: PCChips M912 Ver. 1.4 (this one is with real cache chips)
Chipset: UMC UM8498/8496 (486 VL Chipset "Super Energy Star Green") (CHIP16/CHIP18)
BIOS/Version: AMI + Award BIOS (combined into one 1 Mbit (128 kB) EEPROM*)
AMI BIOS ID: 40-E300-001437-00111111-121593-GREEN-H
AMI BIOS Sign-on: Release 07/08/1994
Award BIOS ID: 07/13/94--2C4X6H01-00
Award BIOS Sign-on: Release 07/15/94'

The attachment M912 1_4.jpg is no longer available

AMI BIOS:

The attachment M912 1_4 AMI BIOS.zip is no longer available

Award BIOS:

The attachment M912 1_4 Award BIOS.zip is no longer available

AMI + Award BIOS combined into one 128 kB image*:

The attachment M912 1_4 AMI + Award BIOS.zip is no longer available

*- AMI or Award BIOS is selected by jumper JP2: 1-2 or 2-3 pins shorted. Short 3-4 pins of JP1 (ext. batt. connector) to clears CMOS when switching BIOSes through JP2!

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