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VEGA 486G-VIP (REV. 1.0)

YOUNG MICRO SYSTEMS, INC.

VEGA 486G-VIP (REV. 1.0)

Processor

80486SX/80486DX/80486DX2/80486DX4/P24D/Pentium Overdrive

Processor Speed

25/33/40/50(internal)/66(internal)/75(internal)/100(internal)MHz

Chip Set

Intel

Max. Onboard DRAM

128MB

Cache

128/256/512KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slot, 32-bit PCI slots (3), IDE interface, PS/2 mouse connector

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Speaker

CN1

IDE interface LED

CN6

Reset switch

CN2

IDE interface

CN7

Turbo LED

CN3

32-bit PCI slots

PC1 - PC3

Turbo switch

CN4

32-bit VESA local bus slots

SL1

PS/2 mouse connector

CN5

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

IDE interface enabled

JP4

pins 1 & 2 closed

 

IDE interface disabled

JP4

pins 2 & 3 closed

Factory configured - do not alter

JP9

N/A

Flash BIOS write protect disabled

JP10

pins 2 & 3 closed

 

Flash BIOS write protect enabled

JP10

pins 1 & 2 closed

Mouse IRQ12 enabled

JP15

Closed

 

Mouse IRQ12 disabled

JP15

Open

Monitor type select color

JP16

Closed

 

Monitor type select monochrome

JP16

Open

SMI disabled

JP25

pins 2 & 3 closed

 

SMI enabled

JP25

pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

NONE

NONE

NONE

4MB

(1) 512K x 36

(1) 512K x 36

NONE

NONE

4MB

(1) 1M x 36

NONE

NONE

NONE

8MB

(1) 1M x 36

(1) 1M x 36

NONE

NONE

8MB

(1) 2M x 36

NONE

NONE

NONE

16MB

(1) 4M x 36

NONE

NONE

NONE

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

32MB

(1) 4M x 36

(1) 4M x 36

NONE

NONE

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

64MB

(1) 8M x 36

(1) 8M x 36

NONE

NONE

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG

128KB

(4) 32K x 8

NONE

(1) 32K x 8

256KB

(4) 64K x 8

NONE

(1) 32K x 8

256KB

(4) 32K x 8

(4) 32K x 8

(1) 32K x 8

512KB

(4) 128K x 8

NONE

(1) 32K x 8

512KB

(4) 64K x 8

(4) 64K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JC1

JC2

JC3

JC4

JC5

128KB

2 & 3

1 & 2

Open

Open

Open

256KB

1 & 2

2 & 3

Open

Closed

Open

256KB

1 & 2

1 & 2

Closed

Closed

Open

512KB

1 & 2

1 & 2

Open

Closed

Closed

512KB

1 & 2

1 & 2

Closed

Closed

Closed

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP2

JP3

JP26

JP43

JR57

80486SX

pins 2 & 3 closed

Open

Open

Open

Closed

80486DX

pins 1 & 2 closed

Open

Open

Open

Closed

80486DX2

pins 1 & 2 closed

Closed

Closed

Open

Closed

80486DX4

pins 1 & 2 closed

Closed

Closed

Open

Closed

P24D

pins 1 & 2 closed

Closed

Closed

Open

Open

Pentium Overdrive

pins 1 & 2 closed

Closed

Closed

Open

Closed

CPU SPEED CONFIGURATION

Speed

JP7

JP8

JP40

JP41

25MHz

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed

33MHz

pins 1 & 2 closed

pins 2 & 3 closed

Closed

Open

40MHz

pins 2 & 3 closed

pins 1 & 2 closed

Open

Open

50iMHz

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed

66iMHz

pins 1 & 2 closed

pins 2 & 3 closed

Closed

Open

75iMHz

pins 2 & 3 closed

pins 2 & 3 closed

Open

Closed

100iMHz

pins 1 & 2 closed

pins 2 & 3 closed

Closed

Open

CPU SPEED CONFIGURATION (80486DX4 ONLY)

Speed

JP1

2x

pins 1 & 2 closed

2.5x

pins 2 & 3 closed

3x

Open

CPU VOLTAGE CONFIGURATION

Voltage

JV0

JV3

JV4

3.3V

Open

Open

Open

5.0V

Closed

Closed

Closed

VESA WAIT STATE CONFIGURATION

Wait states

JP36

0 wait states

Open

1 wait state

Closed

BUS SPEED CONFIGURATION

CPU speed

JP37

<= 33MHz

Open

> 33MHz

Closed

CMOS CONFIGURATION

CPU Type

JP12

JP13

CMOS memory normal operation

Closed

Closed

CMOS memory clear

Open

Open