NCR CORPORATION

MODEL 3386-6XXX PC925/PC386

Processor

80386

Processor Speed

25MHz

Chip Set

Unidentified

Video Chip Set

None

Maximum Onboard Memory

16MB (8MB on external memory card)

Maximum Video Memory

None

Cache

None

BIOS

Unidentified

Dimensions

355mm x 304mm

I/O Options

External memory card

NPU Options

80387

CONNECTIONS

Purpose

Location

Purpose

Location

Turbo LED

J1

External battery

J9

Speaker

J7

External memory card

SL1

Power LED & keylock

J8

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Jumper not used

J2

N/A

»

BIOS type select 27256

J4

Pins 1 & 2 closed

 

BIOS type select 27128

J4

Pins 2 & 3 closed

»

NPU installed

J5

Pins 1 & 2 closed

 

NPU not installed

J5

Pins 2 & 3 closed

»

Manufacturing diagnostics loop disabled

SW/1

Off

 

Manufacturing diagnostics loop enabled

SW/1

On

 

Monitor type select color

SW/2

On

 

Monitor type select monochrome

SW/2

Off

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

411000

None

8MB

411000

(4) 1M x 9

Note: The location of banks 0 & 1 are unidentified. The number of chips for bank 0 are unidentified.

DRAM JUMPER CONFIGURATION

Size

J27

4MB

Pins 1 & 2, 3 & 4 closed

8MB

Pins 2 & 3, 4 & 5 closed

MISCELLANEOUS TECHINCAL NOTE

The location of all pin 1s are unidentified.