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80486VESA (03-0027X-01)

FREE COMPUTER TECHNOLOGY, INC.

80486VESA (03-0027X-01)

Device Type

Mainboard

Processor

80486SX/80487SX/80486DX/ODP486SX/80486DX2

Processor Speed

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

Chip Set

SIS

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slot (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Turbo LED

JP16

Power saving feature

JP2

Speaker

JP17

Power saving feature

JP11

Power LED & keylock

JP18

Reset switch

JP14

32-bit VESA card

S1

Turbo switch

JP15

32-bit VESA card

S2

SIMM 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) 4M x 9

(4) 1M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU SPEED CONFIGURATION

Speed

JP6

JP7

JP8

20MHz

Open

Closed

Closed

25MHz

Closed

Open

Closed

33MHz

Closed

Closed

Open

40MHz

Open

Open

Closed

50MHz

Open

Closed

Open

CPU TYPE CONFIGURATION

CPU Type

JP9

JP10

JP22

JP23

80486SX/DX PQFP

1 & 2, 3 & 4

1 & 2

Closed

Open

80486SX PGA

2 & 3

Open

Open

Closed

80486DX/DX2 PGA

1 & 2, 3 & 4

1 & 2

Open

Closed

80487SX/SX2 PGA

1 & 2, 3 & 4

2 & 3

Open

Closed

(2)80486DX2 PGA

1 & 2, 3 & 4

1 & 2

Open

Closed

(2)80487SX PGA

1 & 2, 3 & 4

2 & 3

Open

Closed

Note:Pins designated should be in the closed position.

WAIT STATE SELECTION

Setting

JP19

0

Open

1

Closed

VL-BUS SPEED SELECTION

Setting

JP20

<= 33MHz

Open

>33 MHz

Closed

CACHE SIZE

Size

Bank 0

Bank 1

TAG

64KB

(8) 8K x 8

(8) 8K x 8

(1) 8K x 8

128KB

(4) 32K x 32

None

(1) 8K x 8

256KB

(8) 32K x 8

(8) 32K x 8

(1) 32K x 8

CACHE JUMPER

Size

JP12

JP13

64KB

Open

Open

128KB

Closed

1 & 2

256KB

Closed

2 & 3

Note: Pins designated should be in the closed position.