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Packard Bell 486T M/Board

Specification

  • Battery : 3.6 V Lithium (Removable)
  • BIOS : 128 KB - Phoenix BIOS V1.10.0915 (latest). To access (Ctrl)-(Alt)-(S).
  • Cache : Write Back: 8 KB Internal (Level 1) Cache 128 KB Static Ram, 20ns
  • CPU : Intel 486DX-25
  • Interfaces :
    • 1 DB-25 Parallel Port
    • 1 DB-9 Serial Port
    • 1 5-pin DIN Keyboard
  • RAM : 4MB Standard on Motherboard. 16MB Maximum on Motherboard.
  • Speaker : External on front chassis.
  • Video : Oak adapter on expansion slot.

Jumpers

JumperFunctionPinsDescription
JP1FDC1-2
2-3
* Enabled
Disabled
JP2Display Mode1-2* Colour
Monochrome
JP3IDE Interface1-2
2-3
* Enabled
Disabled

Upgrades

  • Cache : This system has 128Kb of cache memory. No additional cache can be added.
  • CPU : The 486T motherboard uses 238 pin type 2 socket. The CPU may be replaced with the Intel Overdrive Processor.
  • RAM :
    • 4MB Standard on Motherboard.
    • 16MB Maximum on Motherboard.
    • No jumper setting required.
    • Recommended SIMM speed is 80ns.
    • This motherboard uses 30 pin SIMMs.
    • Four identical SIMMs must be installed in one bank.
    • Base Memory is 640Kb always. Shadow BIOS & Shadow Video take 128Kb each. (Comes off Extended Memory).
  • Video Memory : This system has a 512k video card installed (PBSVGA). It can be upgraded by replacing the card with another video card.