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





ISA-486SV2

UNIDENTIFIED

ISA-486SV2

Processor

80486SX/80487SX/80486DX/80486DX2/Pentium Overdrive

Processor Speed

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

Chip Set

Unidentified

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

None

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

BCON1

Reset switch

CON3

Turbo switch

CON1

Speaker

CON4

Turbo LED

CON2

Power LED & keylock

CON5

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

 

Battery type select internal

BJP1

pins 1 & 2 closed

 

Battery type select external

BJP1

pins 2 & 3 closed

 

Monitor type select CGA

JP2

pins 2 & 3 closed

 

Monitor type select monochrome/EGA/VGA

JP2

pins 1 & 2 closed

 

CPU type select AMD/Intel

JP22

pins 2 & 3 closed

 

CPU type select Cyrix

JP22

pins 1 & 2 closed

Factory configured - do not alter

TP13

pins 1 & 2 closed

Factory configured - do not alter

TP14

pins 1 & 2 closed

Factory configured - do not alter

TP15

pins 1 & 2 closed

Factory configured - do not alter

TP17

pins 2 & 3 closed

Factory configured - do not alter

TP25

1D

Factory configured - do not alter

TP26

Open

Factory configured - do not alter

TP27

1D

Note: The location of jumpers TP17, TP25, TP26 and TP27 are unidentified.

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

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

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 8

NONE

(1) 8K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

CJ1

CJ2

CJ3

64KB

pins 2 & 3 closed

pins 2 & 3 closed

Open

128KB

pins 1 & 2 closed

Open

Closed

256KB

pins 1 & 2 closed

pins 1 & 2 closed

Open

CPU TYPE CONFIGURATION

Type

CPJ1

CPJ2

CPJ3

80486SX (PQFP)

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486SX (PGA)

pins 2 & 3 closed

pins 2 & 3 closed

Open

80487SX

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

pins 1 & 2 closed

80486DX

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

pins 2 & 3 closed

80486DX2

pins 1 & 2, 3 & 4 closed

pins 2 & 3 closed

pins 2 & 3 closed

Pentium Overdrive

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

pins 1 & 2 closed

Note: See also JP22 in User Configurable Settings table.

CPU SPEED CONFIGURATION

Speed

CS1

CS2

CS3

20MHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

25MHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

33MHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

pins 2 & 3 closed

50iMHz

pins 1 & 2 closed

pins 1 & 2 closed

pins 2 & 3 closed

50MHz

pins 2 & 3 closed

pins 1 & 2 closed

pins 1 & 2 closed

66iMHz

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed