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GMB-386UN

ROBOTECH, INC.

GMB-386UN

Processor

80386DX

Processor Speed

33/40MHz

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

32/64/128/256KB

BIOS

AMI

Dimensions

254mm x 220mm

I/O Options

None

NPU Options

80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Speaker

JP18

Turbo LED

JP16

Reset switch

JP19

Turbo switch

JP17

Power LED & keylock

JP20

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP2

pins 1 & 2 closed

 

CMOS memory clear

JP2

pins 2 & 3 closed

Monitor type select color

JP3

Closed

 

Monitor type select monochrome

JP3

Open

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

20MB

(4) 256K x 9

(4) 1M x 9

20MB

(4) 1M x 9

(4) 256K x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

32KB

(4) 8K x 8

NONE

(1) 8K x 8

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION (WRITE BACK)

Size

JP8

JP9

JP10

JP11

JP12

JP13

JP14

JP15

32KB

2 & 3

Open

2 & 3

1 & 2

2 & 3

Open

2 & 3

Open

64KB

1 & 2

Closed

2 & 3

2 & 3

1 & 2

Open

2 & 3

Open

128KB

1 & 2, 3 & 4

Closed

1 & 2

2 & 3

2 & 3

Closed

2 & 3

Open

256KB

1 & 2, 4 & 5

Closed

2 & 3

2 & 3

2 & 3

Closed

1 & 2

Closed

Note: Pins designated should be in the closed position.

CACHE JUMPER CONFIGURATION (WRITE THROUGH)

Size

JP8

JP9

JP10

JP11

JP12

JP13

JP14

JP15

32KB

2 & 3

Open

2 & 3

2 & 3

2 & 3

Open

2 & 3

Open

64KB

1 & 2

Closed

2 & 3

2 & 3

2 & 3

Open

2 & 3

Open

128KB

1 & 2, 3 & 4

Closed

2 & 3

2 & 3

2 & 3

Closed

2 & 3

Open

256KB

1 & 2, 4 & 5

Closed

2 & 3

2 & 3

2 & 3

Closed

2 & 3

Closed

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP7

JP21

33MHz

pins 1 & 2 closed

pins 1 & 2 closed

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

MATH COPROCESSOR WAIT STATE CONFIGURATION

Wait states

JP5

0 wait states

Closed

1 wait state

Open

A20 GATE CONFIGURATION

Setting

JP4

Hardware emulate

Open

8042 keyboard controller

pins 1 & 2 closed

Cyrix CPU emulate

pins 2 & 4 closed

Keyboard controller controls Cyrix CPU

pins 3 & 4 closed