PCChips M520
chipChipset
cpuCPU socket
speedFSB speeds
50MHz60MHz66MHz
moboForm factor
Baby AT (max 220 x 330 mm)
dimDimensions
220 mm x 260 mm
chipCache
0B256KB512KB
ramMax RAM size
128MB
ramRAM types
72-pin FPM72-pin EDOSDR UDIMM168-pin EDO UDIMM
pwrPSU connector
connI/O ports
1x 
AT Keyboard
1x 
Floppy interface
2x 
IDE interface
1x 
IrDA
1x 
PS/2 mouse
1x 
Parallel
2x 
Serial
2x 
USB 1.x
cardExpansion slots
4x 
16-bit ISA
3x 
32-bit PCI
1x 
COAST Slot
1x 
Pentium VRM Header

Also known as:

  • EURONE EM-5100V
  • CONCORD OFFICE AUTOMATION INDUSTRIAL (HK),, LTD. COA-520
  • YKM P5520VX
  • Skywell M520 (1.5)
  • Skywell SW-5100 (1.8)

Known issues:

  • Inadequate Power Delivery

This motherboard may have insufficient power delivery, which can lead to unstable or unsafe operation. In extreme cases, this may result in hardware damage, spontaneous combustion, or other electrical failures. Users should exercise caution and consider upgrading the motherboard power supply or other components to ensure safe and stable operation. The RetroWeb community may also provide guidance and assistance in mitigating this issue.

Notes:

Known for having an illegal BIOS.

L bios can only be upgraded to L bios, S only to S bios. Failing to do so can result in non-bootable board.

Needs patched BIOS (either the patched last official BIOS or the Unicore BIOS) to use HDDs larger than 32 GB. Split Voltage CPU Support w/ VRM and BIOS update

Last updated 2024-01-01T15:36:43Z
Score is 9.4/10
20 files available

Vendor: Award [20 entries]

POST string
Note
Core Ver.
BIOS Ver.
Last edit
POST string
12/07/98-i430VX-2A59GHTBC-00
Note
Unicore BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/18/96-i430VX-10031996C-00
Note
First Legal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/18/96-i430VX-10031996C-00
Note
First Legal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/15/97-i430VX-02271997C-00
Note
Last Official BIOS for M520 (UMC S variant)
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/15/97-i430VX-02271997C-00
Note
128 GB Patched BIOS (UMC S variant)
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/17/97-i430VX-02271997C-00
Note
Last Official BIOS for M520 (UMC L variant)
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
10/17/97-i430VX-02271997C-00
Note
128 GB Patched BIOS (UMC L variant)
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
09/15/97-i430VX-02271997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
09/26/97-i430VX-02271997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
12/07/98-i430VX-2A59GHTBC-00
Note
Modded by Jan Steunebrink
Core version
4.51PG
BIOS version
Last edit
pwr 2021-04-08
POST string
09/15/97-i430VX-02271997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
09/26/97-i430VX-02271997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
08/26/96-i430VX-2A59Ht5BC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
08/26/96-i430VX-2A59Ht5BC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
06/21/96-i430VX-2A59Ht5BC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
06/21/96-i430VX-2A59Ht5BC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
05/30/96-i430VX-2A59Gf5BC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
05/27/96-i430VX-2A59Ht5AC-00
Note
Ilegal BIOS
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
03/03/97-i430VX-02071997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
POST string
02/19/97-i430VX-02151997C-00
Note
Core version
4.51PG
BIOS version
Last edit
pwr 2020-07-12
drv 1 driver available
Name
Version
OS support
Size
Filename
Name
Version
3.00
OS support
1987os2 OS/2 Warp 3.0 1993win Windows NT 3.5 1995win Windows 95 1995win Windows NT 3.51 1995win Windows NT 4.0
Size
unknown
Filename
doc 2 board documents available
Language
Release date
File
Last edit
Language
English
Release date
File
Last edit
pwr 2024-01-01
Language
German
Release date
File
Last edit
pwr 2020-07-12
chipdoc 7 chip documents available
Chip
Language
Release date
File
Last edit
Chip
Language
English
Release date
File
Last edit
pwr 2022-08-14
Chip
Language
English
Release date
File
Last edit
pwr 2023-08-20
Chip
Language
English
Release date
File
Last edit
pwr 2022-08-14
Chip
Language
English
Release date
File
Last edit
pwr 2023-05-16
Chip
Language
English
Release date
File
Last edit
pwr 2023-05-01
Chip
Language
English
Release date
File
Last edit
pwr 2023-05-01
Chip
Language
English
Release date
File
Last edit
pwr 2023-08-20

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