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Packard Bell 486-25 (486i) M/Board

Specification

  • Battery : In 24-pin DIP module (DS1287)
  • BIOS : 2 x 32 KB - Phoenix BIOS V1.10.19.IO (latest). To access, Ctrl-Alt-Insert
  • Bus Architecture : ISA based system bus
  • Cache : Write Back: 8 KB Internal (Level 1) Cache
  • CPU : Intel 486DX-25
  • Interfaces :
    • 1 DB-25 Parallel Port
    • 1 DB-9 Serial Port
    • 1 5-pin DIN Keyboard
  • RAM : 8MB Standard on Motherboard. 64MB Maximum on Motherboard.
  • Speaker : Diaphragm inside rear center.
  • Video : Trident adapter on expansion slot.

Jumpers

FunctionPinsDescription
EPROM Size  E2-E3
E3-E4
256 Kb *
512 Kb
PasswordE5-E6
E6-E7  
Enabled
Disabled *

* Default Settings

Upgrades

  • Cache : This system has 8Kb of cache built into the processor. No cache upgradability is in the system.
  • CPU : This system does not support a co-processor upgrade. The 486/25DX chip already has a math co-processor built into it.
  • RAM : Memory upgrades may be done with proprietary 32-bit memory cards 486mem4 (4MB upgradeable to 16MB) and 486mem8 (8MB not upgradeable).
  • Video Memory : This system has a video card. Replace the video card to upgrade the video memory.