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B880

MECER CORPORATION

B880

Processor

SL80486SX/80486SX/CX486DX/SL80486DX/80486DX/SL80486DX2/ 80486DX2/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)MHz

Chip Set

Contaq

Max. Onboard DRAM

128MB

Cache

128/256/512/1024KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

32-bit VESA local bus slots (2), 32-bit PCI slots (3), green PC connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard connector

JP1

Turbo LED

JP59 pins 11 - 12

External battery

JP3

Green PC LED

JP59 pins 13 - 14

External battery

JP4

Turbo switch

JP59 pins 16 - 17

Green PC connector

JP6

Reset switch

JP59 pins 19 - 20

Power LED & keylock

JP59 pins 1 - 4

32-bit PCI slots

PC1 - PC3

Speaker

JP59 pins 7 - 10

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP2

pins 1 & 2 closed

 

CMOS memory clear

JP2

pins 2 & 3 closed

PQFP CPU disabled

JP33

Closed

 

PQFP CPU enabled

JP33

Open

PCI clock delay select 1 delay

JP43

pins 1 & 2 closed

 

PCI clock delay select 3 delays

JP43

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(1) 256K x 36

2MB

(1) 256K x 36

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(1) 1M x 36

5MB

(1) 1M x 36

(4) 256K x 9

8MB

(4) 1M x 9

(1) 1M x 36

8MB

(1) 1M x 36

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(1) 4M x 36

17MB

(1) 4M x 36

(4) 256K x 9

20MB

(4) 1M x 9

(1) 4M x 36

20MB

(1) 4M x 36

(4) 1M x 9

32MB

(4) 4M x 9

(1) 4M x 36

32MB

(1) 4M x 36

(4) 4M x 9

64MB

(4) 16M x 9

NONE

65MB

(4) 256K x 9

(1) 16M x 36

65MB

(1) 16M x 36

(4) 256K x 9

68MB

(4) 1M x 9

(1) 16M x 36

68MB

(1) 16M x 36

(4) 1M x 9

80MB

(4) 4M x 9

(1) 16M x 36

80MB

(1) 16M x 36

(4) 4M x 9

128MB

(4) 16M x 9

(1) 16M x 36

128MB

(1) 16M x 36

(4) 16M x 9

DRAM JUMPER CONFIGURATION

Type

JP10

JP11

Bank 0 = 30-pin & Bank 1 = 72-pin

pins 1 & 2 closed

pins 2 & 3 closed

Bank 0 = 72-pin & Bank 1 = 30-pin

pins 2 & 3 closed

pins 1 & 2 closed

Bank 0/1 = double side 72-pin

Open

pins 1 & 2, 3 & 4 closed

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 64K x 8

512KB

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

1MB

(4) 128K x 8

(4) 128K x 8

(1) 128K x 8

CACHE JUMPER CONFIGURATION

Size

JP49

JP50

JP51

128KB

pins 1 & 2 closed

pins 2 & 3 closed

Open

256KB

pins 1 & 2 closed

pins 1 & 2 closed

Open

256KB

pins 1 & 2 closed

pins 2 & 3 closed

Open

512KB

pins 2 & 3 closed

Open

pins 1 & 2 closed

512KB

pins 2 & 3 closed

pins 2 & 3 closed

Open

1MB

pins 2 & 3 closed

Open

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP35

JP36

JP41

JP52

80486SX

1 & 2

Open

1 & 2

1 & 2, 3 & 4

SL80486SX

2 & 3

Open

1 & 2

2 & 3

CX486DX

2 & 3

1 & 2

2 & 3

1 & 2, 3 & 4

80486DX

2 & 3

Open

1 & 2

1 & 2, 3 & 4

SL80486DX

2 & 3

Open

1 & 2

1 & 2, 3 & 4

80486DX2

1 & 2

Open

1 & 2

1 & 2, 3 & 4

SL80486DX2

2 & 3

Open

1 & 2

1 & 2, 3 & 4

P24D (WB)

2 & 3

2 & 3

1 & 2

1 & 2, 3 & 4

P24D (WT)

2 & 3

2 & 3

1 & 2

1 & 2, 3 & 4

Pentium Overdrive (WB)

2 & 3

1 & 2

1 & 2

1 & 2, 3 & 4

Pentium Overdrive (WT)

2 & 3

1 & 2

1 & 2

1 & 2, 3 & 4

Note: WB = write back & WT = write through. Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP53

JP55

JP56

JP57

80486SX

Open

Open

Open

Open

SL80486SX

1 & 2

Open

3 & 4, 5 & 6

Open

CX486DX

2 & 3

2 & 3

4 & 5

5 & 6

80486DX

Open

2 & 3

Open

Open

SL80486DX

1 & 2

2 & 3

3 & 4, 5 & 6

Open

80486DX2

Open

2 & 3

Open

Open

SL80486DX2

1 & 2

2 & 3

3 & 4, 5 & 6

Open

P24D (WB)

1 & 2, 3 & 4

2 & 3

3 & 4, 5 & 6

2 & 3, 4 & 5

P24D (WT)

1 & 2, 3 & 4

2 & 3

3 & 4, 5 & 6

1 & 2, 4 & 5

Pentium Overdrive (WB)

1 & 2

1 & 2

5 & 6

3 & 4

Pentium Overdrive (WT)

1 & 2

1 & 2

5 & 6

1 & 2

Note: WB = write back & WT = write through. Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP17

JP22

JP39

JP40

JP47

25MHz

Closed

Closed

1 & 2

2 & 3

2 & 3

33MHz

Closed

Open

2 & 3

1 & 2

2 & 3

40MHz

Open

Open

1 & 2

2 & 3

1 & 2

50iMHz

Closed

Closed

1 & 2

2 & 3

2 & 3

50MHz

Open

Open

2 & 3

1 & 2

1 & 2

66iMHz

Closed

Open

2 & 3

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

VESA WAIT STATE CONFIGURATION

Wait states

JP60

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP61

<= 33MHz

Open

> 33MHz

Closed

PCI IRQ CONFIGURATION (IRQ3)

IRQ

JP10A

IRQ3 PCI compliant

pins 1 & 2 closed

IRQ3 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ4)

IRQ

JP10B

IRQ4 PCI compliant

pins 1 & 2 closed

IRQ4 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ5)

IRQ

JP10C

IRQ5 PCI compliant

pins 1 & 2 closed

IRQ5 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ7)

IRQ

JP10D

IRQ7 PCI compliant

pins 1 & 2 closed

IRQ7 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ10)

IRQ

JP10E

IRQ10 PCI compliant

pins 1 & 2 closed

IRQ10 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ11)

IRQ

JP10F

IRQ11 PCI compliant

pins 1 & 2 closed

IRQ11 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ12)

IRQ

JP10G

IRQ12 PCI compliant

pins 1 & 2 closed

IRQ12 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ15)

IRQ

JP10H

IRQ15 PCI compliant

pins 1 & 2 closed

IRQ15 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ9)

IRQ

JP10I

IRQ9 PCI compliant

pins 1 & 2 closed

IRQ9 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ6)

IRQ

JP10J

IRQ6 PCI compliant

pins 1 & 2 closed

IRQ6 PCI non compliant

pins 2 & 3 closed

PCI IRQ CONFIGURATION (IRQ14)

IRQ

JP10K

IRQ14 PCI compliant

pins 1 & 2 closed

IRQ14 PCI non compliant (1 card installed)

pins 2 & 3 closed

IRQ14 PCI non compliant (2 cards installed)

pins 2 & 4 closed

PCI COMPLIANCE CONFIGURATION

Slot

JP7

Slot 1 compliant

pins 1 & 2 closed

Slot 1 non-compliant

pins 2 & 3 closed

Slot 2 compliant

pins 4 & 5 closed

Slot 2 non-compliant

pins 5 & 6 closed

Slot 3 compliant

pins 7 & 8 closed

Slot 3 non-compliant

pins 8 & 9 closed

Slot 3 non-compliant *

pins 11 & 12 closed

Note: * Slot 3 has a second non-compliant PCI card installed.