...because we can't all be on the bleeding edge...





PREMMIA MX 4/66D, PREMMIA MX 4/100T

AST RESEARCH, INC.

PREMMIA MX 4/66D, PREMMIA MX 4/100T

Processor

80486SX/486 Overdrive/80486DX/80486DX2/80486DX4/P24T

Processor Speed

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

Chip Set

Unidentified

Video Chip Set

ATI

Maximum Onboard Memory

128MB

Maximum Video Memory

4MB

Cache

64/256KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interfaces (2), parallel port, PS/2 mouse port, serial ports (2), riser slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

PS/2 mouse port

CN2

External battery

J26

Serial port

CN3

Speaker

J27

Serial port

CN4

Chassis fan power

J28

Parallel port

CN5

Front console LED

J29 pins 1 - 4

IDE interface 1

J22

Chassis fan power

J32

IDE interface 2

J23

IDE interface LED

J40

Floppy drive interface

J24

Riser slot

SL1

USER CONFIGURABLE SETTINGS

Function

Label

Position

»

Factory configured - do not alter

E6

Pins 1 & 2 closed

»

CMOS memory normal operation

E8

Open

 

CMOS memory clear

E8

Closed

»

Flash BIOS normal operation

SW1/1

Off

 

Flash BIOS force update at boot

SW1/1

On

»

Password normal operation

SW1/2

On

 

Password clear

SW1/2

Off

»

Monitor type select color

SW1/3

On

 

Monitor type select monochrome

SW1/3

Off

»

Setup access enabled

SW1/4

Off

 

Setup access disabled

SW1/4

On

»

Factory configured - do not alter

SW1/5

Off

»

Factory configured - do not alter

SW1/6

On

»

Factory configured - do not alter

SW1/7

On

»

Factory configured - do not alter

SW1/8

On

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(1) 1M x 32

None

None

None

8MB

(1) 2M x 32

None

None

None

8MB

(1) 1M x 32

(1) 1M x 32

None

None

9MB

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

None

10MB

(1) 1M x 32

(1) 1M x 32

(1) 256K x 32

(1) 256K x 32

12MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

None

16MB

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

(1) 1M x 32

16MB

(1) 4M x 32

None

None

None

17MB

(1) 2M x 32

(1) 2M x 32

(1) 256K x 32

None

18MB

(1) 2M x 32

(1) 2M x 32

(1) 256K x 32

(1) 256K x 32

20MB

(1) 2M x 32

(1) 2M x 32

(1) 1M x 32

None

24MB

(1) 2M x 32

(1) 2M x 32

(1) 1M x 32

(1) 1M x 32

DRAM CONFIGURATION (CON’T)

Size

Bank 0

Bank 1

Bank 2

Bank 3

24MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

None

32MB

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

(1) 2M x 32

32MB

(1) 8M x 32

None

None

None

32MB

(1) 4M x 32

(1) 4M x 32

None

None

33MB

(1) 4M x 32

(1) 4M x 32

(1) 256K x 32

NONE

34MB

(1) 4M x 32

(1) 4M x 32

(1) 256K x 32

(1) 256K x 32

36MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

NONE

40MB

(1) 4M x 32

(1) 4M x 32

(1) 1M x 32

(1) 1M x 32

40MB

(1) 4M x 32

(1) 4M x 32

(1) 2M x 32

NONE

48MB

(1) 4M x 32

(1) 4M x 32

(1) 2M x 32

(1) 2M x 32

48MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

NONE

64MB

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

(1) 4M x 32

64MB

(1) 8M x 32

(1) 8M x 32

NONE

NONE

66MB

(1) 8M x 32

(1) 8M x 32

(1) 256K x 32

(1) 256K x 32

68MB

(1) 8M x 32

(1) 8M x 32

(1) 1M x 32

NONE

72MB

(1) 8M x 32

(1) 8M x 32

(1) 1M x 32

(1) 1M x 32

72MB

(1) 8M x 32

(1) 8M x 32

(1) 2M x 32

NONE

80MB

(1) 8M x 32

(1) 8M x 32

(1) 2M x 32

(1) 2M x 32

80MB

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

NONE

96MB

(1) 8M x 32

(1) 8M x 32

(1) 4M x 32

(1) 4M x 32

96MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

NONE

128MB

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

(1) 8M x 32

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 9

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 9

CACHE JUMPER CONFIGURATION

Size

E5

64KB

Open

256KB

Closed

CPU SPEED SELECTION

Speed

E7

E9

25MHz

Pins 1 & 2 closed

Closed

33MHz

Pins 2 & 3 closed

Open

50iMHz

Pins 1 & 2 closed

Closed

66iMHz

Pins 2 & 3 closed

Open

100iMHz

Pins 1 & 2 closed

Closed

Note: If 100iMHz is used, jumper E4 must be open.

CPU SPEED SELECTION (80486DX4 ONLY)

Voltage

E4

2x

Pins 2 & 3 closed

2.5x

Pins 1 & 2 closed

3x

Open

CPU TYPE SELECTION

Type

E1

E2

E3

E10

80486SX (PQFP)

Open

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

486 Overdrive

Open

Pins 2 & 3 closed

Pins 1 & 2 closed

Closed

80486DX

Open

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

80486DX2

Open

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

80486DX2 (WB)

Open

Pins 1 & 2 closed

Pins 2 & 3 closed

Open

80486DX4

Open

Pins 1 & 2 closed

Pins 1 & 2 closed

Closed

P24T

Open

Pins 2 & 3 closed

Pins 2 & 3 closed

Open

Note: E10 may not be present not on all boards. To use write through cache on P24T, set E1 to the closed position.

CPU VOLTAGE CONFIGURATION

Voltage

E11

E12

E13

E14

E15

E16

3v Cyrix

2 & 3

2 & 3

2 & 3

2 & 3

Open

1 & 2

3v Intel

1 & 2

1 & 2

1 & 2

1 & 2

Closed

2 & 3

5v Cyrix

2 & 3

2 & 3

2 & 3

2 & 3

Open

Open

5v Intel

1 & 2

1 & 2

1 & 2

1 & 2

Closed

Open

Note: Pins designated should be in the closed position. The location of E12 is unidentified. The above jumpers may not be present on all boards. If these jumpers are not present, only Intel CPUs may be used.