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Board 020 - IBM Unknown [System Board]

IBM FRU 55

Id: B020

Type: System Board / ?

CPU: Intel 486 SX 25MHz

BIOS:

Memory:

  • Bank0: SIMM 72-pin
    • Slot Mem1: populated
    • Slot Mem2: populated
    • Slot Mem3: empty
    • Slot Mem4: empty

Physical characteristics:

  • Copyright 1993

Connectors

  • Internal:
    • BT1 (Battery)
    • J1 (Power) 12-pin head
    • J2 (Floppy) 
    • J3 (IDE)
    • J13 (VLB ?)
    • J23: 2-pin head
    • J24: 2-pin head
    • J25: 2-pin head
    • U10
    • U12 (Cache) Broken
    • 26-pin head
    • U47 [VEM1]
    • U48 [VEM2]
  • External:
    • Video: 14-pin female
    • Parallel: D-25 female
    • Serial 1: D-9 Male
    • Serial 2: D-9 Male
    • Mouse: Mini DIN-6 female
    • Kbd: Mini DIN-6 female

Switches:

  • J5: 3-pin head [BOOTBLK]
  • J6: 3-pin head [?RTPRO]
  • J9: 2-pin head [PWDBYP]
  • J10: 3-pin head DX/DX2]
  • J11: 3-pin head [DX/DX2]
  • J16: 3-pin head [MONOADPTR]
  • J17: 3-pin head [ENABL/DISABL]
Missing:
  • Manuals
  • Software
  • Cables
  • Packaging


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