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





S680

CHEERFUL INTERNATIONAL CORPORATION

S680

   

Processor

80386SX

Processor Speed

16MHz

Chip Set

Intel

Max. Onboard DRAM

2MB

Cache

None

BIOS

AMI

Dimensions

330.2mm x 218.4mm

I/O Options

None

NPU Options

80387SX

   

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

CN1

Speaker

CN4

Turbo switch

CN2

Power LED & keylock

CN7

Turbo LED

CN3

External battery

CN8

Note:CN2 can be connected to a turbo switch, however the manufacturer recommends that the computer be turned off before changing the CPU speed.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CPU speed select fast

CN2

closed

 

CPU speed select slow

CN2

open

Battery select internal

CN9

pins 2 & 3 closed

 

Battery select external

CN9

pins 1 & 2 closed

Monitor type select monochrome

JP2

open

 

Monitor type select color

JP2

closed

BIOS type select 2764

JP4

pins 1 & 2 closed

 

BIOS type select 27128

JP4

pins 2 & 3 closed

Factory configured - do not alter

JP10

unknown

Factory configured - do not alter

JP11

unknown

Factory configured - do not alter

JP12

unknown

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

E1 - E8

512KB

(18) 41256

NONE

NONE

NONE

pins 1 & 2 closed

512KB

NONE

NONE

(2) 256K x 9

NONE

pins 2 & 3 closed

1MB

(18) 41256

(18) 41256

NONE

NONE

pins 1 & 2 closed

1MB

NONE

NONE

(2) 256K x 9

(2) 256K x 9

pins 2 & 3 closed

1.5MB

(18) 41256

(18) 41256

(2) 256K x 9

NONE

pins 1 & 2 closed

2MB

(18) 41256

(18) 41256

(2) 256K x 9

(2) 256K x 9

pins 1 & 2 closed

2MB

(18) 411000

NONE

NONE

NONE

pins 1 & 2 closed

2MB

NONE

NONE

(2) 1M x 9

NONE

pins 2 & 3 closed

4MB

(18) 411000

(18) 411000

NONE

NONE

pins 1 & 2 closed

4MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

pins 2 & 3 closed

6MB

(18) 411000

(18) 411000

(2) 1M x 9

NONE

pins 1 & 2 closed

8MB

(18) 411000

(18) 411000

(2) 1M x 9

(2) 1M x 9

pins 1 & 2 closed

DRAM MODE CONFIGURATION

Mode

DRAM type

JP8

JP9

Page Mode (Four page)

100ns

pins 1 & 2 closed

pins 1 & 2 closed

Page Mode (One page)

100ns

pins 2 & 3 closed

pins 1 & 2 closed

Fast mode

100ns

pins 1 & 2 closed

pins 2 & 3 closed

Slow mode

120ns

pins 2 & 3 closed

pins 2 & 3 closed