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BRAVO MT (202528-XXX)

AST RESEARCH, INC.

BRAVO MT (202528-XXX)

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

AST

Max. Onboard DRAM

64MB

Cache

64/256KB

BIOS

AST

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), VGA feature connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

E1

VGA port

J18

Reset switch

E3

VGA feature connector

J19

IDE interface LED

E4

IDE interface

J22

PS/2 mouse port

J12

Floppy drive interface

J24

Parallel port

J13

Chassis fan power

J28

Serial ports (2)

J10 & J44

   

Note: Serial port J44 is located under J10.

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

CMOS memory normal operation

E5

Open

 

CMOS memory clear

E5

Closed

Factory configured - do not alter

E14

pins 1 & 2 closed

Parallel port IRQ select IRQ7

E15

pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

E15

pins 2 & 3 closed

Factory configured - do not alter

E800

pins 1 & 2 closed

Factory configured - do not alter

E801

pins 2 & 3 closed

Power management enabled

E802

pins 1 & 2 closed

 

Power management disabled

E802

pins 2 & 3 closed

Factory configured - do not alter

E803

pins 1 & 2 closed

Factory configured - do not alter

E804

pins 1 & 2 closed

On board video enabled

SW1/1

Off

 

On board video disabled

SW1/1

On

POST type select normal

SW1/2

Off

 

POST type select test loop

SW1/2

On

Boot type select normal

SW1/3

Off

 

Boot type select flash BIOS update

SW1/3

On

Password enabled

SW1/4

Off

 

Password disabled

SW1/4

On

Monitor type select color

SW1/5

On

 

Monitor type select monochrome

SW1/5

Off

Factory configured - do not alter

SW1/6

Off

Factory configured - do not alter

SW1/7

Off

System setup type select allow access

SW1/8

Off

 

System setup type select deny access

SW1/8

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

NONE

NONE

NONE

2MB

(1) 256K x 36

(1) 256K x 36

NONE

NONE

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

NONE

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

4MB

(1) 1M x 36

NONE

NONE

NONE

5MB

(1) 1M x 36

(1) 256K x 36

NONE

NONE

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

NONE

7MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

9MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

NONE

10MB

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

NONE

13MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

NONE

NONE

NONE

17MB

(1) 4M x 36

(1) 256K x 36

NONE

NONE

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

NONE

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 1M x 36

NONE

NONE

21MB

(1) 4M x 36

(1) 1M x 36

(1) 256K x 36

NONE

22MB

(1) 4M x 36

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

NONE

25MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 256K x 36

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

33MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

NONE

34MB

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

36MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

NONE

37MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 256K x 36

40MB

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

NONE

49MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 256K x 36

52MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 1M x 36

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(1) 8K x 8

256KB

(8) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

E6

E7

E8

64KB

pins 1 & 2 closed

Open

Open

256KB

pins 2 & 3 closed

Closed

Closed

Note: Some later versions have omitted jumper E6.

CPU UPGRADE CONFIGURATION

Type

E9

E10

E11

E12

E13

None

N/A

N/A

N/A

N/A

2 & 3

80486SX

Open

2 & 3

2 & 3

2 & 3

1 & 2

80487SX

Closed

1 & 2

1 & 2

2 & 3

1 & 2

80486DX/DX2

Closed

2 & 3

1 & 2

2 & 3

2 & 3

Overdrive (ODPR)

Closed

2 & 3

1 & 2

2 & 3

1 & 2

Overdrive (ODP)

Closed

1 & 2

1 & 2

2 & 3

2 & 3

Overdrive (P24T)

Closed

1 & 2

1 & 2

1 & 2

2 & 3

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

E16

25MHz

Open

33MHz

Closed

50iMHz

Open

66iMHz

Closed

VIDEO MEMORY CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

512KB

(1) 256K x 16

NONE

NONE

1MB

(1) 256K x 16

(1) 256K x 16

NONE

2MB

(1) 256K x 16

(1) 256K x 16

(2) 256K x 16

Note: Bank 0 is factory installed and is not configurable.