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386CM

UNIDENTIFIED

386CM

Processor

80386DX

Processor Speed

25MHz

Chip Set

Intel

Max. Onboard DRAM

16MB

Cache

32KB

BIOS

Unidentified

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387DX/3167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BC1

Reset switch

J19

Power LED & keylock

J17

Speaker

J20

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

NPU synchronous with CPU

JP1

pins 1 & 2 closed

 

NPU asynchronous with CPU

JP1

pins 2 & 3 closed

BIOS type select 27512

JP4

pins 1 & 2 closed

 

BIOS type select 27256

JP4

pins 2 & 3 closed

Non-cacheable region select 0E0000-0FFFFF (27512)

JP5

pins 1 & 2 closed

 

Non-cacheable region select 0F0000-0FFFFF (27256)

JP5

pins 2 & 3 closed

NPU disabled

JP6

pins 1 & 2 closed

 

NPU enabled

JP6

pins 2 & 3 closed

NPU disabled

JP8

pins 1 & 2 closed

 

NPU enabled

JP8

pins 2 & 3 closed

32-bit memory access wait state select 4 wait states

JP10

pins 1 & 2 closed

 

32-bit memory access wait state select 3 wait states

JP10

pins 2 & 3 closed

Turbo speed enabled

J21

Open

 

Turbo speed disabled

J21

Closed

32-bit memory RAS# & CAS# T state select 1 T state

JP25

pins 1 & 2 closed

 

32-bit memory RAS# & CAS# T state select 0.5 T state

JP25

pins 2 & 3 closed

Monitor type select color

SW2

pins 1 & 2 closed

 

Monitor type select monochrome

SW2

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Extended

Bank 0

Bank 1

Bank 2

Bank 3

1MB

0KB

(4) 256K x 9

NONE

NONE

NONE

1MB

384KB

(4) 256K x 9

NONE

NONE

NONE

2MB

1408KB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

2432KB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

3456KB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

3456KB

(4) 1M x 9

NONE

NONE

NONE

5MB

4480KB

(4) 1M x 9

(4) 256K x 9

NONE

NONE

6MB

5504KB

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

NONE

7MB

6528KB

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

8MB

7552KB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

8576KB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

NONE

10MB

9600KB

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

(4) 256K x 9

12MB

10624KB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

12MB

11648KB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

13MB

12672KB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 256K x 9

16MB

13696KB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

14720KB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

DRAM JUMPER CONFIGURATION

Size

SW4/1

SW4/2

SW4/3

SW4/4

1MB

On

On

On

On

1MB

Off

On

On

On

2MB

On

Off

On

On

3MB

Off

Off

On

On

4MB

On

On

Off

On

4MB

On

On

Off

On

5MB

Off

On

Off

On

6MB

On

Off

Off

On

7MB

Off

Off

Off

On

8MB

On

On

On

Off

9MB

Off

On

On

Off

10MB

On

Off

On

Off

12MB

Off

Off

On

Off

12MB

On

On

Off

Off

13MB

Off

On

Off

Off

16MB

On

Off

Off

Off

16MB

Off

Off

Off

Off

Note:The location of SW4 is unidentified.

CACHE CONFIGURATION

Size

Bank 0

0KB

NONE

32KB

(4) 8K x 8

Note: The location of the cache bank is unidentified

CACHE JUMPER CONFIGURATION

Size

JP2

JP3

JP22

0KB

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

32KB

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

DMA MODE CONFIGURATION

Mode

JP7

JP9

Normal (processor holds on all DMA & refresh cycles)

pins 1 & 2 closed

pins 1 & 2 closed

Bypass (processor holds on cache DMA invalidation cycles only)

pins 2 & 3 closed

pins 2 & 3 closed