...because we can't all be on the bleeding edge...





386SX-16-20-25

ARNOS INSTRUMENTS & COMPUTER SYSTEMS, INC.

386SX-16-20-25

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

None

Max. Onboard DRAM

8MB

Cache

None

BIOS

Quadtel

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

X6

Power LED & keylock

X14

Turbo LED

X11

Status display

X17

Reset switch

X12

Speaker

X21

Turbo switch

X13

   

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Battery installed < 5VDC

S1

pins 1 & 2 closed

 

Battery installed > 5VDC

S1

pins 2 & 3 closed

CPU speed select switchable at keyboard

S2

pins 2 & 3 closed

 

CPU speed select switchable at turbo switch

S2

pins 1 & 2 closed

Factory configured - do not alter

SW1/1

N/A

NPU enabled

SW1/2

Off

 

NPU disabled

SW1/2

On

Normal CPU speed during floppy operations

SW1/3

Off

 

Slow CPU speed to 8MHz during floppy operations

SW1/3

On

Monitor type select monochrome

SW1/4

Off

 

Monitor type select color

SW1/4

On

Factory configured - do not alter

SW1/5

N/A

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

4MB

(2) 1M x 9

(2) 1M x 9

NONE

NONE

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

DRAM SWITCH CONFIGURATION

Size

Banks used

SW1/6

SW1/7

SW1/8

1MB

0 & 1

On

On

On

2MB

0, 1, 2 & 3

On

Off

On

2MB

0

On

Off

Off

4MB

0 & 1

Off

On

On

6MB

0, 1 & 2

Off

Off

On

8MB

0, 1, 2 & 3

Off

Off

Off