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486/SLC 25

AUSTIN COMPUTER SYSTEMS

486/SLC 25

Processor

80386SX/CX486SLC

Processor Speed

25MHz

Chip Set

C & T

Max. Onboard DRAM

16MB

Cache

None

BIOS

AMI

Dimensions

220mm x 220mm

I/O Options

16-bit external cache memory card slot

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J1

External battery

J13

Turbo switch

J7

Reset switch

J14

Turbo LED

J8

16-bit external cache memory card

S1

Power LED & keylock

J10

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU speed select forced high

J7

pins 1 & 2 closed

Monitor type select color

J12

pins 1 & 2 closed

 

Monitor type select monochrome

J12

pins 2 & 3 closed

CMOS memory normal operation

J15

pins 2 & 3 closed

 

CMOS memory clear

J15

pins 1 & 2 closed

Cache card absent

W1

pins 2 & 3 closed

 

Cache card present

W1

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(2) 256K x 9

(2) 256K x 9

NONE

NONE

2MB

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

NONE

NONE

3MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

5MB

(2) 256K x 9

(2) 256K x 9

(2) 1M x 9

(2) 1M x 9

6MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

9MB

(2) 256K x 9

(2) 256K x 9

(2) 4M x 9

NONE

10MB

(2) 1M x 9

(2) 4M x 9

NONE

NONE

12MB

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

NONE

16MB

(2) 4M x 9

(2) 4M x 9

NONE

NONE

CACHE JUMPER CONFIGURATION FOR CACHE CARD

Size

J2

J3

J4

J5

J6

64KB/2-Way Set Associative

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

64KB/Directly Mapped

2 & 3

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.