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BRAVO LC 4/100T

AST RESEARCH, INC.

BRAVO LC 4/100T

Processor

80486SX/SL80486DX/SL80486DX2/SL80486DX4/P24T

Processor Speed

25/33/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

Unidentified

Video Chip Set

Cirrus Logic

Maximum Onboard Memory

64MB

Maximum Video Memory

1MB

Cache

64/256KB

BIOS

Unidentified

Dimensions

355mm x 304mm

I/O Options

32-bit VESA local bus slot, floppy drive interface, IDE interface, parallel port, PS/2 mouse port, serial ports (2), 8514 video pass through connector, VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN1

IDE interface

J22

Serial port

CN2

Floppy drive interface

J24

Serial port

CN3

Speaker

J27

Parallel port

CN4

Chassis fan power

J28

VGA port

CN5

Front panel LEDs

J29

8514 video pass through connector

J19

32-bit VESA local bus slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

Parallel port IRQ select IRQ7

E2

Pins 1 & 2 closed

 

Parallel port IRQ select IRQ5

E2

Pins 2 & 3 closed

On board video enabled

E7

Closed

 

On board video disabled

E7

Open

Monitor type select color

E8

Closed

 

Monitor type select monochrome

E8

Open

Factory configured - do not alter

E9

Closed

Password normal operation

E10

Closed

 

Password clear

E10

Open

Factory configured - do not alter

E11

Open

Factory configured - do not alter

E16

Open

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

DRAM CONFIGURATION (CON'T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

E12

E14

64KB

Open

Open

256KB

Closed

Closed

CACHE TYPE CONFIGURATION

Type

E1

E6

E20

Write through

Pins 1 & 2 closed

Pins 1 & 2 closed

Open

Write back

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

Note: E20 may not be present on all boards.

VIDEO MEMORY CONFIGURATION (1994 CONFIGURATION)

Size

Bank 0

Bank 1

512KB

(4) 256K x 4

None

1MB

(4) 256K x 4

(4) 256K x 4

Note: Bank 0 is factory installed and is not configurable. On some revisions, Bank 1 may be factory installed. Board shown uses this configuration.

VIDEO MEMORY CONFIGURATION (1995 CONFIGURATION)

Size

Bank 0

Bank 1

512KB

(1) 256K x 16

None

1MB

(1) 256K x 16

(1) 256K x 16

Note: Bank 0 is factory installed and is not configurable. On some revisions, Bank 1 may be factory installed. If board is a 1995 configuration, install the upgrade chip in socket U802.

CPU SPEED SELECTION

Speed

E15

25MHz

Closed

33MHz

Open

50iMHz

Closed

66iMHz

Open

75iMHz

Closed

100iMHz

Open

CPU TYPE SELECTION

Type

E3

E4

E5

E13

80486SX (PQFP)

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Open

80486SX (PGA)

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

SL80486DX

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

SL80486DX2

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

SL80486DX4

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Closed

P24T

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

Closed

CPU TYPE SELECTION

Type

E17

E18

E19

Cyrix

Pins 2 & 3 closed

Pins 2 & 3 closed

Pins 2 & 3 closed

Intel

Pins 1 & 2 closed

Pins 1 & 2 closed

Pins 1 & 2 closed

Note: These jumpers may not be present on all boards. If they are not, board only supports processor that was shipped from the factory.