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