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80486AT (Ver. 1.0)

BEC COMPUTER ENTERPRISE

80486AT (Ver. 1.0)

Processor

80486DX

Processor Speed

25/33MHz

Chip Set

None

Max. Onboard DRAM

16MB

SRAM Cache

64/256KB

BIOS

AMI

Dimensions

355mm x 304mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

W1

Power LED & keylock

W5

Turbo switch

W3

Speaker

W10

Turbo LED

W4

External battery

W11

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

7MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

NONE

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

13MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

CPU SWITCH (SW2) CONFIGURATION

Size

SW2/switch 1

SW2/switch 2

SW2/switch 3

SW2/switch 4

1MB

open

open

open

open

2MB

closed

open

open

open

3MB

open

closed

open

open

4MB

closed

closed

open

open

4MB

open

open

closed

open

5MB

open

open

closed

closed

6MB

open

closed

open

closed

7MB

closed

open

open

closed

8MB

closed

open

closed

open

9MB

open

closed

closed

closed

10MB

closed

closed

open

closed

12MB

open

closed

closed

open

13MB

closed

closed

closed

closed

16MB

closed

closed

closed

open

SRAM JUMPER CONFIGURATION

Size

Jumper W6

Jumper W8

Jumper W9

64KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

SRAM CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(2) 16K x 4

256KB

(8) 32K x 8

(2) 16K x 4