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SC486DX

INTERLOGIC INDUSTRIES

SC486DX

Processor

80486DX

Processor Speed

33MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

Cache

64/256KB

BIOS

Award

Dimensions

350mm x 125mm

I/O Options

Bus mouse port, floppy drive interface, IDE interface, parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Auxiliary keyboard

CN1

IDE interface

CN9

Power LED & keylock

CN2

Parallel port

CN10

Speaker

CN3

External battery

CN11

Reset switch

CN4

Serial port 1

CN12

IDE interface LED

CN5

Bus mouse port

CN13

Turbo switch

CN6

Serial port 2

CN14

Turbo LED

CN7

Floppy drive interface LED

LED

Floppy drive interface

CN8

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Bus speed select ATCLK/4 (5.5 MHz)

JP1

Closed

 

Bus speed select ATCLK/6 (8.5 MHz)

JP1

Open

Factory configured - do not alter (selects iOSC/2)

JP5

pins 2 & 3 closed

Watchdog Timer mode select system reset after time-out

JP9

pins 1 & 2 closed

 

Watchdog Timer mode select low IOCHK# NMI after time-out

JP9

pins 2 & 3 closed

 

Watchdog Timer mode select disabled

JP9

Open

Floppy drive interface enabled

JP10

pins 1 & 2 closed

 

Floppy drive interface disabled

JP10

pins 2 & 3 closed

Hard drive controller enabled or installed

JP11

pins 2 & 3 closed

 

Hard drive access disabled

JP11

pins 1 & 2 closed

IDE interface enabled

JP12

pins 1 & 2 closed

 

IDE interface disabled

JP12

pins 2 & 3 closed

Bus mouse interrupt select IRQ5

JP13

pins 1 & 2 closed

 

Bus mouse interrupt select IRQ4

JP13

pins 3 & 4 closed

 

Bus mouse interrupt select IRQ3

JP13

pins 5 & 6 closed

 

Bus mouse interrupt select IRQ9

JP13

pins 7 & 8 closed

 

Bus mouse interrupt select none (disabled)

JP13

Open

CMOS memory normal operation

JP14

pins 1 & 2 closed

 

CMOS memory clear

JP14

pins 2 & 3 closed

Serial port 1 select COM1 (I/O address 3F8-3FFh)

JP15

pins 1 & 2 closed

 

Serial port 1 select COM3 (I/O address 3E8-3EFh)

JP15

pins 2 & 3 closed

Serial port 1 enabled

JP16

pins 1 & 2 closed

 

Serial port 1 disabled

JP16

pins 2 & 3 closed

Parallel port enabled

JP17

pins 1 & 2 closed

 

Parallel port disabled

JP17

pins 2 & 3 closed

Serial port 2 enabled

JP18

pins 1 & 2 closed

 

Serial port 2 disabled

JP18

pins 2 & 3 closed

Serial port 2 select COM2 (I/O address 2F8-2FFh)

JP19

pins 1 & 2 closed

 

Serial port 2 select COM4 (I/O address 2E8-2EFh)

JP19

pins 2 & 3 closed

Bus mouse port enabled

JP20

pins 1 & 2 closed

 

Bus mouse port disabled

JP20

pins 2 & 3 closed

Serial port 2 interrupt select IRQ3

JP21

pins 1 & 2 closed

 

Serial port 2 interrupt select IRQ4

JP21

pins 2 & 3 closed

Serial port 1 interrupt select IRQ4

JP22

pins 1 & 2 closed

 

Serial port 1 interrupt select IRQ3

JP22

pins 2 & 3 closed

Parallel port interrupt select IRQ7 (LPT1)

JP23

pins 1 & 2 closed

 

Parallel port interrupt select IRQ5 (LPT2)

JP23

pins 2 & 3 closed

Parallel port select LPT1 (I/O address 378-37Fh)

JP24

pins 1 & 2 closed

 

Parallel port select LPT2 (I/O address 278-27Fh)

JP24

pins 2 & 3 closed

Watchdog Timer interval select 500ms

JP25

Closed

 

Watchdog Timer interval select 1 second

JP25

Open

Monitor type select color

JP26

Closed

 

Monitor type select monochrome

JP26

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

1MB

(4) 256K x 9

NONE

2MB

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

5MB

(4) 256K x 9

(4) 1M x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 4M x 9

(4) 1M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

TAG (U31)

64KB

(8) 8K x 8

(1) 8K x 8

256KB

(8) 32K x 8

(1) 32K x 8

Note:The location of the TAG is unidentified and may not be present on some revisions.

CACHE JUMPER CONFIGURATION

Size

JP2

JP3

JP4

64KB

Open

Open

Open

256KB

Closed

Closed

Closed

CPU TYPE CONFIGURATION

Type

JP6

JP7

JP8

80486SX

Open

N/A

pins 2 & 3 closed

80487SX

Closed

pins 2 & 3 closed

pins 1 & 2 closed

80486DX

Closed

pins 1 & 2 closed

pins 1 & 2 closed