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786 ACIO VESA (VER. 2)

UNIDENTIFIED

786 ACIO VESA (VER. 2)

Device Type

Mainboard

Processor

80386DX/CX486DLC/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

Unidentified

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J2

External battery

J7

Turbo switch

J4

Speaker

J100

Turbo LED

J5

32-bit VESA Local bus slot

S1

Reset switch

J6

32-bit VESA Local bus slot

S2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

J3

Closed

 

Monitor type select monochrome

J3

Open

CMOS memory normal operation (Internal battery)

JMP3

Pins 2 & 3 closed

CMOS memory normal operation (External battery)

JMP3

Pins 1 & 2 closed

 

CMOS memory clear

JMP3

Pins 2 & 4 closed

NPU enabled

JMP4

Pins 2 & 3 closed

 

NPU disabled

JMP4

Pins 1 & 2 closed

Factory configured - do not alter

JMP7

Closed

Factory configured - do not alter

JMP13

Pins 1 & 2 closed

VESA BUS SELECTION

Function

JMP6

JMP14

JMP15

 

466-50MHz VESA local bus enabled

Open

1 & 2

1 & 2

 

All other VESA local busses enabled

Closed

2 & 3

2 & 3

Note: Pins designated should be in the closed position.

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

None

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

None

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

None

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG/U26

TAG/U27

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JMP1A

JMP1B

JMP1C

JMP8

64KB

1 & 2

1 & 2

1 & 2

1 & 2, 4 & 5

128KB

2 & 3

1 & 2

2 & 3

2 & 3, 4 & 5

256KB

2 & 3

2 & 3

2 & 3

2 & 3, 5 & 6

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JMP2

JMP5

80386DX

2 & 3

Closed

CX486DLC

Open

Open

80486SX

1 & 2

Open

80486DX

2 & 3

Open

80486DX2

2 & 3

Open

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JMP9

80386DX/25MHz

Pins 1 & 5 and 2 & 6 closed

80386DX/33MHz

Pins 1 & 5 and 4 & 8 closed

80386DX/40MHz

Pins 1 & 5, 3 & 7 and 4 & 8 closed

CX486DLC-33

Pins 1 & 5 and 4 & 8 closed

CX486DLC-40

Pins 1 & 5, 3 & 7 and 4 & 8 closed

80486SX-33

Pins 4 & 8 closed

80486DX/50MHz

Pins 3 & 7 closed

80486DX/25MHz

Pins 2 & 6 closed

80486DX/33MHz

Pins 4 & 8 closed

80486DX2/50i MHz

Pins 2 & 6 closed

80486DX2/66i MHz

Pins 4 & 8 closed