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TOPCAT 386SX

UNIDENTIFIED

TOPCAT 386SX

Processor

80386SX

Processor Speed

16/20/25MHz

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

None

BIOS

AMI/Award/Phoenix/Quadtel

Dimensions

236mm x 220mm

I/O Options

None

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

CN1

Turbo LED

JP1

External battery

CN3

Turbo switch

JP6

Power LED & keylock

CN4

Reset switch

JP10

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

Power good signal detect from board

CN2

pins 1 & 2 closed

 

Power good signal detect from power supply

CN21

pins 2 & 3 closed

 

CMOS memory normal operation

HDR1

pins 1 & 2 closed

 

CMOS memory clear

HDR1

pins 3 & 4 closed

 

BIOS type select Phoenix

JP2

pins 1 & 2 closed

 

BIOS type select AMI/Award/Quadtel

JP2

pins 2 & 3 closed

 

CPU speed select hardware/external switch

JP3

pins 1 & 2 closed

 

CPU speed select keyboard control

JP3

pins 2 & 3 closed

 

Monitor type select color

JP4

Closed

 

Monitor type select monochrome

JP4

Open

 

Parity enabled

JP7

Closed

 

Parity disabled

JP7

Open

DRAM CONFIGURATION

Size

Bank 0A

Bank 1A

Bank 0

Bank 1

Bank 2

Bank 3

512KB

(4) 44256

NONE

NONE

NONE

NONE

NONE

1MB

(4) 44256

(4) 44256

NONE

NONE

NONE

NONE

1.5MB

(4) 44256

NONE

(2) 256K x 9

(2) 256K x 9

NONE

NONE

2MB

NONE

NONE

(2) 1M x 9

NONE

NONE

NONE

3MB

(4) 44256

(4) 44256

(2) 1M x 9

NONE

NONE

NONE

4MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

NONE

NONE

4.5MB

(4) 44256

NONE

(2) 1M x 9

(2) 1M x 9

NONE

NONE

5MB

(4) 44256

(4) 44256

(2) 1M x 9

(2) 1M x 9

NONE

NONE

6MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

NONE

8MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

8MB

NONE

NONE

(2) 4M x 9

NONE

NONE

NONE

9MB

(4) 44256

(4) 44256

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

(2) 1M x 9

9MB

(4) 44256

(4) 44256

(2) 4M x 9

NONE

NONE

NONE

12MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

NONE

16MB

NONE

NONE

(2) 4M x 9

(2) 4M x 9

NONE

NONE

16.5MB

(4) 44256

NONE

(2) 4M x 9

(2) 4M x 9

NONE

NONE

17MB

(4) 44256

(4) 44256

(2) 4M x 9

(2) 4M x 9

NONE

NONE

18MB

NONE

NONE

(2) 4M x 9

(2) 4M x 9

(2) 1M x 9

NONE

20MB

NONE

NONE

(2) 1M x 9

(2) 1M x 9

(2) 4M x 9

(2) 4M x 9

20MB

NONE

NONE

(2) 4M x 9

(2) 4M x 9

(2) 1M x 9

(2) 1M x 9

24MB

NONE

NONE

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

NONE

32MB

NONE

NONE

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

(2) 4M x 9

DRAM PARITY CONFIGURATION

Size

P 0

P 1

512KB

(2) 41256

NONE

1MB

(2) 41256

(2) 41256

1.5MB

(2) 41256

(2) 41256

3MB

(2) 41256

(2) 41256

4.5MB

(2) 41256

NONE

5MB

(2) 41256

(2) 41256

9MB

(2) 41256

(2) 41256

9MB

(2) 41256

(2) 41256

16.5MB

(2) 41256

NONE

17MB

(2) 41256

(2) 41256

17MB

(2) 41256

(2) 41256

Note: If Bank 0A and/or Bank 1A is filled, use this table to determine correct parity.