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386SX Rev. B

OMNITEL, INC.

386SX Rev. B

Processor

80386SX

Processor Speed

20/25MHz

Chip Set

OPTI

Max. Onboard DRAM

16MB

Cache

16/32/64KB

BIOS

MR

Dimensions

330.2mm x 218.4mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Turbo switch

JP15

Turbo LED

JP13

Speaker

JP16

Reset switch

JP14

Power LED & keylock

JP17

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Battery select internal

JP10

pins 2 & 3 closed

 

Battery select external

JP10

pins 1 & 2 closed

Diagnostics disabled

JP12

Open

 

Diagnostics enabled

JP12

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

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

16KB

1 & 2

1 & 2

1 & 2

Open

Open

1 & 2

32KB

1 & 2

2 & 3

1 & 2

Closed

Open

2 & 3

64KB

2 & 3

2 & 3

2 & 3

Open

Closed

2 & 3

Note:Pins designated should be in the closed position.

CACHE CONFIGURATION

Size

Bank 0

Bank 1

16KB

(2) 8K x 8

NONE

32KB

(2) 8K x 8

(2) 8K x 8

64KB

(2) 32K x 8

NONE

Note:TAG is factory installed and cannot be altered.