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386SX/486DX

ROBOTECH, INC.

386SX/486DX

Processor

80386DX/CX486DLC/80486SX/80487SX/ODP486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

OPTI

Max. Onboard DRAM

64MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387DX

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo LED

J5

Speaker

J2

External battery

J6

Turbo switch

J3

32-bit VESA local bus slots

SL1 & SL2

Reset switch

J4

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Turbo switch enabled

J3

Open

 

turbo switch disabled

J3

Closed

CMOS memory normal operation

J6

pins 2 & 3 closed

 

CMOS memory clear

J6

pins 3 & 4 closed

Cyrix DLC PQFP CPU disabled

JP4

Closed

 

Cyrix DLC PQFP CPU enabled

JP4

Open

80386DX/80486DX PQFP CPU disabled

JP15

Closed

 

80386DX/80486DX PQFP CPU enabled

JP15

Open

Monitor type select color

JP21

Closed

 

Monitor type select monochrome

JP21

Open

Factory configured - do not alter

JP23

Open

VESA card select standard card in SL1

JP24

pins 2 & 3 closed

 

VESA card select WD31 or Tekram IDE card (50MHz only)

JP24

pins 1 & 2 closed

Battery type select Lithum

JP26

pins 1 & 2 closed

 

Battery type select NI-CD

JP26

pins 2 & 3 closed

80486DX-50 version select old

JP28

Open

 

80486DX-50 version select new

JP28

Closed

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) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U18)

TAG (U19)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

NONE

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

(1) 8K x 8

CACHE JUMPER CONFIGURATION

Size

JP10

JP11

JP16

JP17

64KB

pins 2 & 3 closed

pins 2 & 3 closed

Open

Open

128KB

pins 1 & 2 closed

pins 1 & 2 closed

Closed

Open

256KB

pins 2 & 3 closed

pins 2 & 3 closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP14

JP20

JP25

JP27

80386

Open

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486

Closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION (80386DX/CX486DLC)

Type

JP14

JP15

JP20

JP25

JP27

80386DX (PQFP)

Open

Open

2 & 3

1 & 2

1 & 2

80386DX (PGA)

Open

Closed

2 & 3

1 & 2

1 & 2

CX486DLC (PGA)

Open

Closed

2 & 3

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION (80386DX/CX486DLC)

Speed

JP6

JP7

JP8

JP9

JP22

33MHz

Closed

Closed

Open

pins 2 & 3 closed

Open

40MHz

Closed

Closed

Closed

pins 2 & 3 closed

Open

CPU TYPE CONFIGURATION (80486)

Type

JP2

JP18

JP19

80486SX (PGA)

Open

Open

pins 2 & 3 closed

80487SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

ODP486SX

pins 2 & 3 closed

Closed

pins 1 & 2 closed

80486DX/DX2

pins 1 & 2 closed

Closed

pins 1 & 2 closed

CPU SPEED CONFIGURATION (80486)

Speed

JP6

JP7

JP8

JP9

JP22

25MHz

Open

Open

Open

pins 1 & 2 closed

Closed

33MHz

Open

Open

Closed

pins 1 & 2 closed

Open

40MHz

Open

Closed

Closed

pins 1 & 2 closed

Open

50iMHz

Open

Open

Open

pins 1 & 2 closed

Closed

50MHz

Open

Closed

Open

pins 1 & 2 closed

Open

66iMHz

Open

Open

Closed

pins 1 & 2 closed

Open

VESA IDE CONFIGURATION

IDE

JP1

JP12

JP13

IDE2

Open

Open

Closed

IDE3

Open

Closed

Open

IDE4

Closed

Open

Open