Aquarius Systems/BCOM MB-4D33NR

Also known as: Aquarius Systems/BCOM MB-4D50NR

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Form factor/PSU connector:
Baby AT AT-Style (P8-P9)
Chipset: UMC UM82C493/491 [UM82C491, UM82C493]
Dimensions: 254mm x 220mm
CPU socket and platform: 486
Supported FSB speeds: 16MHz 20MHz 25MHz 33MHz 40MHz 50MHz
Supported RAM size and types: 64 MB 30-pin SIMM 72-pin FPM
Cache: 64 KB 128 KB 256 KB
BIOS images:
Manuf.POST StringNoteCore Ver.BIOS Ver.
Award 03/09/94-UMC-491-2C4X2A30-00 MB-4D33/50NR-02 4.50G 02
I/O ports:Expansion slots:Known issues:
  • 1x AT Keyboard
  • 3x 32-bit VLB
  • 1x 8-bit ISA
  • 6x 16-bit ISA
  • Leaky Ni-Cd clock battery
Supported CPUs:
ModelSpeedFSBVoltagesL1 CacheL2 CacheL3 CacheCoreProcessTDPPart Number
AMD Am486 DX-40 40MHz 40MHz 5V 8KB (Write-Through) - - - - - A80486DX-40
Intel i486 DX 50 50MHz 50MHz 5V 8KB (Write-Through) - - P4 1000nm - A80486DX-50
Intel i486 SX 33 33MHz 33MHz 5V 8KB (Write-Through) - - P23 1000nm - A80486SX-33
Intel i486 DX 33 33MHz 33MHz 5V 8KB (Write-Through) - - P4 1000nm - A80486DX-33
Intel i486 DX2 50 50MHz 25MHz 5V 8KB (Write-Through) - - P24 800nm - A80486DX2-50
Intel i486 SX 25 25MHz 25MHz 5V 8KB (Write-Through) - - P23 1000nm - A80486SX-25
Intel i486 DX 25 25MHz 25MHz 5V 8KB (Write-Through) - - P4 1000nm - A80486DX-25
Intel i486 SX 20 20MHz 20MHz 5V 8KB (Write-Through) - - P23 1000nm - A80486SX-20
Intel i486 SX 16 16MHz 16MHz 5V 8KB (Write-Through) - - P23 1000nm - A80486SX-16