MB-84XXUUD
166/75/80/100/120/133/150/160Mhz 80486 Mainboard + IDE + IO

Jp 8, Jp 9 : ECP DMA Channel No. Select

Jp 13 Flash Memory Program Voltage Select
1-2 closed : +5 Volt Flash Memory used
2-3 closed : +12 Volt Flash Memory used
open : Eprom used

Jp 42 :This Jumper Has 2 Functions :
External Battery : Take out Jp42 , Pin 1 = +, Pin 4 = - (Use 4..6 Volt Battery)
Cmos Discharge : 2-3 Closed, Normal Mode, 3-4 Closed : Clear Cmos

JP 47 : PS/2 Mouse Jumper

Jp 12 : DS12887A(BQ3287A)/EOC12C887A Clear Select (For Dallas Used)
3-4 open : Normal Operation(Default)
3-4 Closed : Clear DS12887A(Bq3287A/OEC12C887A) R.T.C. Module IC
* JP 12 Can be found when the above Ic-numbers is used.

Jp5, Jp6, Jp7 : Cache RAM Size Select

Jp 15, Jp 16, Jp 17 : CPU Clock Select (*Jp 17 : Optional)

Jp 36, Jp 37, Jp 39 : CPU Voltage Select

Jp10, Jp11, Jp31, Jp45, Jp46, RN11-RN15 : CPU Type Select

A: Intel 486/DX2

- Without green (SMM mode) function.

- RN15: Closed
- RN14: Closed
- RN13: Open
- RN12: Open
- RN11: Open
- JP45:2-3 Closed
- JP46:1-2 Closed 4-5 Closed

PS: VER:2 RN11 not install & afterwards.

B: AMD 486 DX/DX2/DX4

- AMD486DX/DX2/DX4 without green(SMM mode) functions.
- CPU's marked with "A80486xxx-xxx NV8T" can support
Write-Trough mode for the CPU's internal cache.

- RN15: Closed
- RN14: Closed
- RN13: Open
- RN12: Open
- RN11: Open
- JP45: 2-3 Closed 5-6 Closed
- JP46: 1-2 Closed 4-5 Closed

Note: DX/DX4: JP45: 2-3 closed DX2: JP45: 2-3,5-6 closed

PS: VER:2 RN11 not install & afterwards.

C: AMD 486 DX/DX2/DX4 Enhanced (plus)
Am 5x86-P75(X5-133), Am5x86-P75+(X5-150),
Am 5x86-P90(X5-160)

- Write back processor, with green (SMM mode) function
- CPU's marked with "A80486xxx-xxxSV8B" can support
write-back mode for the CPU's internal cache.
- CPU's marked with "A80486xxx-xxxSV8T" only support
write-through mode for the CPU,s internal cache.

- RN15: Closed
- RN14: Closed
- RN13: Open
- RN12: Open
- RN11: Open
- JP45:1-2 Closed 4-5 Closed
- JP46:1-2 Closed 4-5 Closed

Note: SV8B--DX2: JP45: 1-2,4-5,closed
DX/DX4: JP45: 1-2 closed

SV8T--DX2: JP45: 1-2,4-5 closed
DX/DX4: JP45: 1-2 closed

Note1:
Am 5x86-P75(X5): JP45: 1-2,4-5 closed
Am 5x86-P75+(X5): JP45: 1-2 closed
Am 5x86-P90(X5): JP45: 1-2,4-5 closed

PS:VER:2 RN11 not install & afterwards.

D: Intel P24D

- CPU'S marked with "&EWxxxx" can support write-back mode for the CPU's internal cache.

- RN15: closed
- RN14: closed
- RN13: open
- RN12: open
- RN11: open
- JP45: 1-2: closed
- JP46: 1-2: closed 4-5: closed

PS: Ver:2 RN11 not install & afterwards.

E: Intel P24T

- Pentium over drive tm processor, 237 pin.
- With green (SMM mode) function.

- RN15: closed
- RN14: closed
- RN13: open
- RN12: open
- RN11: open
- JP45: 1-2 closed
- JP46: 2-3, 4-5 closed

PS: VER:2 RN11 not install & afterwards.

F: Intel 486 DX4-S (P24C)

- CPU's marked with "&Exxx-xxx" can support green function

- RN15: closed
- RN14: closed
- RN13: open
- RN12: open
- RN11: open
- JP45: 1-2 closed
- JP46: 1-2, 4-5 closed

PS: VER:2 RN11 not install & afterwards.

G: Cyrix 486DX/DX2/DX4 (M7)

- Cyrix CPU with green (SMM mode) functions.

- RN15: open
- RN14: open
- RN13: closed
- RN12: closed
- RN11: open
- JP45: 1-2 closed
- JP46: 1-2, 4-5 closed

PS: VER:2 RN11 not install & afterwards.

H: Cyrix 486 DX4-100 (Intel-SMM-Pin out)

- With green (SMM mode) function.

- RN15: closed
- RN14: closed
- RN13: open
- RN12: open
- RN11: open
- JP45: 1-2 closed
- JP46: 1-2, 4-5 closed

PS: VER:2 RN11 not install & afterwards.

I: Cyrix 5x86 (M1SC) (M9)

- With green (SMM mode) function.

- RN15: closed
- RN14: closed
- RN13: open
- RN12: open
- RN11: open
- JP45: 1-2 closed
- JP46: 1-2, 4-5 closed

PS: VER:2 RN11 not install & afterwards.

J: UMC 486 (U5S) (Ver:2 not support UMC 486 (U5S) & afterwards)

- Without green (SMM mode) function.

- RN15: open
- RN14: open
- RN13: open
- RN12: open
- RN11: closed
- JP45: 2-3 closed
- JP46: open

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