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





486E CACHE MAINBOARD

AMERICAN DIGICOM CORPORATION

486E CACHE MAINBOARD

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/40/50(internal)/50/66(internal)MHz

Chip Set

OPTI

Max. onboard DRAM

128MB

SRAM Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330.2mm x 215.8mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J4

Turbo LED

JP17

Power LED & keylock

J5

Reset switch

S9

Turbo switch

JP16

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

I/O bus mode select EISA

JP0

Open

 

I/O bus mode select ISA

JP0

Closed

Monitor type select color

JP4

Closed

 

Monitor type select monochrome

JP4

Open

Factory configured - do not alter

JP6

Open

CPU TYPE CONFIGURATION

Jumper

80486SX

80487SX

80486DX/DX2

JP7

pins 2 & 3 closed

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 and 3 & 4 closed

JP9

Open

pins 1 & 2 closed

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

iOSC

JP1

JP2

JP3

JP8

20MHz

40MHz

Open

Closed

pins 2 & 3

pins 2 & 3

25MHz

50MHz

Open

Open

pins 1 & 2

pins 2 & 3

33MHz

66MHz

Closed

Open

pins 1 & 2

pins 2 & 3

40MHz

80MHz

Open

Closed

pins 1 & 2

pins 2 & 3

50i MHz

50MHz

Open

Open

pins 1 & 2

pins 2 & 3

50MHz

50MHz

Closed

Closed

pins 1 & 2

pins 1 & 2

66i MHz

66MHz

Closed

Open

pins 1 & 2

pins 2 & 3

DRAM CONFIGURATION

Size

Bank 0

Bank 1

4MB

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

128MB

(4) 16M x 9

(4) 16M x 9

SRAM CONFIGURATION

Size

Bank 0

Bank 1

U49

U50

U51

U64

64KB

(4) 8K x 8

(4) 8K x 8

(1) 64K x 1

(1) 8K x 8

NONE

(1) 16K x 1

128KB

(4) 32K x 8

NONE

(1) 64K x 1

(1) 8K x 8

NONE

(1) 16K x 1

256KB

(4) 32K x 8

(4) 32K x 8

(1) 64K x 1

(1) 8K x 8

(1) 8K x 8

(1) 16K x 1

512KB

(4) 128K x 8

NONE

(1) 64K x 1

(1) 32K x 8

NONE

(1) 64K x 1

SRAM JUMPER CONFIGURATION

Jumper

64KB

128KB

256KB

512KB

JP5

pins 2 & 3 closed

pins 1 & 2 closed

pins 2 & 3 closed

pins 1 & 2 closed

JP10

Open

Open

Open

Closed

JP11

Open

Open

Closed

Closed

JP12

Open

Closed

Closed

Closed

JP13

Open

Open

Closed

Closed

JP14

Open

Closed

Closed

Closed

JP15

Open

Open

Open

Closed