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80486 DX/SX CACHE

FORCOM TECHNOLOGY CORPORATION

80486 DX/SX CACHE

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50i/66iMHz

Chip Set

ALI

Max. Onboard DRAM

32MB

Cache

128/256KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

Floppy drive interface, IDE interface, parallel port, PS/2 mouse port,

serial ports (2), VGA port

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Speaker

CN7

Serial port 2

CN2

Reset switch

CN8

Parallel port

CN3

Floppy drive interface

CN9

VGA port

CN4

IDE interface

CN10

Power LED & keylock

CN5

IDE interface LED

JP8

Turbo switch & LED

CN6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor in interlace mode

JP7

Closed

 

Monitor in non-interlace mode

JP7

Open

Monitor type select monochrome

JP10

Closed

 

Monitor type select color

JP10

Open

CPU clock select 33MHz

JP11

pins 2 & 3 closed

 

CPU clock select 25MHz

JP11

pins 1 & 2 closed

 

VGA display enabled

JP12

pins 2 & 3 closed

 

VGA display disabled

JP12

pins 1 & 2 closed

 

VESA monitor enabled

JP14

pins 1 & 2 closed

 

VGA monitor enabled

JP14

pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 3

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

32MB

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

BUS CLOCK CONFIGURATION

OSC Clock

JP3

JP6

32MHz

pins 2 & 3 closed

pins 2 & 3 closed

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

50MHz

pins 1 & 2 closed

pins 2 & 3 closed

66MHz

pins 1 & 2 closed

pins 1 & 2 closed

CPU TYPE CONFIGURATION

CPU Type

JP4

JP5

80486SX

Open

pins 1 & 2 closed

80487SX

pins 1 & 2 closed

pins 2 & 3 closed

80486DX

pins 2 & 3 closed

pins 2 & 3 closed

80486DX2

pins 2 & 3 closed

pins 2 & 3 closed