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





OPTimum EISA486SD - 6A5B1

NOVACOR, INC.

OPTimum EISA486SD - 6A5B1

Processor

80486SX/80487SX/80486DX

Processor Speed

20/25/33/40/50MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256/512KB

BIOS

AMI

Dimensions

330mm x 218mm

I/O Options

None

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

J4

Reset switch

S9

Power LED & keylock

J5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP4

closed

 

Monitor type select monochrome

JP4

open

 

CPU speed select iOCS/1

JP8

pins 1 & 2 closed

 

CPU speed select iOCS/2

JP8

pins 2 & 3 closed

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

CPU TYPE CONFIGURATION

CPU

JP7

JP9

80486DX

pins 1 & 2 and 3 & 4 closed

pins 2 & 3 closed

80487SX

pins 1 & 2 and 3 & 4 closed

pins 1 & 2 closed

80486SX

pins 2 & 3 closed

open

CPU SPEED CONFIGURATION

Speed

JP1

JP2

JP3

JP6

50MHz

closed

closed

pins 1 & 2 closed

open

40MHz

open

closed

pins 1 & 2 closed

open

33MHz

closed

open

pins 1 & 2 closed

open

25MHz

open

open

pins 1 & 2 closed

open

20MHz

open

open

pins 2 & 3 closed

closed

SRAM JUMPER CONFIGURATION

Size

JP5

JP10

JP11

JP12

JP13

JP14

JP15

64KB

pins 2 & 3 closed

open

open

open

open

open

open

128KB

pins 1 & 2 closed

open

open

closed

open

closed

open

256KB

pins 2 & 3 closed

open

closed

closed

closed

closed

open

512KB

pins 1 & 2 closed

closed

closed

closed

closed

closed

closed

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG (U50)

TAG (U51)

Dirty bit (U64)

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

N/A

(1) 16K x 1

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

N/A

(1) 16K x 1

256KB

(8) 32K x 8

Banks 0 & 1

(1) 8K x 8

(1) 8K x 8

(1) 16K x 1

512KB

(4) 128K x 8

Bank 0

(1) 32K x 8

N/A

(1) 64K x 1

Note:Dirty bit (U64) can always accommodate (1) 64K x 1 for any of the four configurations.