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486VL EISA VESA LOCAL BUS (REV. 1.0)

TYAN COMPUTER CORPORATION

486VL EISA VESA LOCAL BUS (REV. 1.0)

Processor

80486SX/80487SX/80486DX/80486DX2

Processor Speed

20/25/33/50 (Internal)/50/66 (Internal)MHz

Chip Set

SIS

Max. Onboard DRAM

256MB

Cache

64/128/256/512/1024KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

JP20

Turbo switch

JP23

Speaker

JP21

Turbo LED

JP24

Reset switch

JP22

32-bit VESA Local bus slots

S1 & S2

USER CONFIGURABLE SETTINGS

Function

Jumper/Switch

Position

Factory configured - do not alter

JP18

Open

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

4MB

(4) 1M x 9

NONE

NONE

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

12MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

NONE

16MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

NONE

NONE

20MB

(4) 1M x 9

(4) 4M x 9

NONE

NONE

24MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

NONE

28MB

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

NONE

40MB

(4) 1M x 9

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

52MB

(4) 1M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

64MB

(4) 16M x 9

NONE

NONE

NONE

128MB

(4) 16M x 9

(4) 16M x 9

NONE

NONE

192MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

NONE

256MB

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

(4) 16M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

TAG (U15)

TAG (U16)

64KB

(4) 8K x 8

(4) 8K x 8

(1) 8K x 8

NONE

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

(1) 8K x 8

NONE

512KB

(8) 32K x 8

(8) 32K x 8

(1) 32K x 8

NONE

1024KB

(8) 128K x 8

NONE

(1) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP5

JP6

JP7

JP8

JP9

JP10

JP12

JP13

JP14

64KB

Open

Open

Open

2 & 3

1 & 2

1 & 2

Open

2 & 3

1 & 2

128KB

Closed

Open

Open

2 & 3

1 & 2

1 & 2

Open

1 & 2

1 & 2

256KB

Closed

Closed

Open

2 & 3

2 & 3

1 & 2

Open

2 & 3

2 & 3

512KB

Closed

Closed

Closed

2 & 3

1 & 2

1 & 2

1 & 2

1 & 2

1 & 2

1024KB

Closed

Closed

Closed

1 & 2

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

Note:Pins designated should be in the closed position.

CPU TYPE CONFIGURATION

Type

JP1

JP2

80486SX

Pins 1 & 2 closed

pins 2 & 3 closed

80487SX

Pins 1 & 2 closed

pins 2 & 3 closed

80486DX

Pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

80486DX2

Pins 2 & 3 closed

pins 1 & 2, 3 & 4 closed

CPU SPEED CONFIGURATION

Speed

JP16

£ 33MHz

pins 2 & 3 closed

> 33MHz

pins 1 & 2 closed