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OPAL 486SLC2 REV C Motherboard Settings and Configuration






IBM CORPORATION

OPAL 486SLC2 REV C

Processor

CX486SLC2

Processor Speed

50(internal)/66(internal)MHz

Chip Set

IBM

Max. Onboard DRAM

16MB

Cache

64/128KB

BIOS

AMI/MR

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387SX

CONNECTIONS

Purpose

Location

Purpose

Location

Reset switch

J1

Turbo switch

J4

Speaker

J2

External battery

J25

Power LED & keylock

J3

32-bit VESA local bus slots

SL1 & SL2

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

CMOS memory normal operation

JP9

pins 2 & 3 closed

 

CMOS memory clear

JP9

pins 1 & 2 closed

Password enabled(MR BIOS only)

JP10

Closed

 

Password disabled (MR BIOS only)

JP10

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

512KB

(2) 256K x 9

NONE

1MB

(2) 256K x 9

(2) 256K x 9

2MB

(2) 1M x 9

NONE

4MB

(2) 1M x 9

(2) 1M x 9

8MB

(2) 4M x 9

NONE

10MB

(2) 1M x 9

(2) 4M x 9

16MB

(2) 4M x 9

(2) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(2) 32K x 8

NONE

(1) 8K x 8

128KB

(2) 32K x 8

(2) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP6

64KB

pins 2 & 3 closed

128KB

pins 1 & 2 closed

CPU SPEED CONFIGURATION

Speed

JP7

JP8

50iMHz

Open

Closed

66iMHz

Closed

Open

BUS SPEED CONFIGURATION

CPU speed

JP5

<=33MHz

Open

>33MHz

Closed

VESA ID CONFIGURATION

ID

JP1

JP2

JP3

JP4

ID0

Open

Open

Open

Closed

ID1

Closed

Closed

Open

Closed

ID2

Closed

Open

Closed

Closed

ID3

Open

Closed

Closed

Closed








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