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80486VESA (03-0030X-02)

FREE COMPUTER TECHNOLOGY, INC.

80486VESA (03-0030X-02)

Device Type

Mainboard

Processor

80486SX/80486SX2/80487SX/ODP486/80486DX/80486DX2/

80486DX3/P24T

Processor Speed

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

Chip Set

SIS 461

Video Chip Set

None

Maximum Onboard Memory

32MB

Maximum Video Memory

1MB

Cache

64/128/256KB

BIOS

Unidentified

Dimensions

254mm x 218mm

I/O Options

32-bit VESA local bus slots (3)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Reset switch

JP17

Power saving

JP2

Turbo LED

JP18

Power saving

JP3

Turbo switch

JP19

Speaker

JP15

32-bit VESA local bus slots

SL1 SL3

Power LED & keylock

JP16

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

Factory configured - do not alter

JP21

Unidentified

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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

None

17MB

(4) 4M x 9

(4) 256K x 9

20MB

(4) 1M x 9

(4) 4M x 9

20MB

(4) 4M x 9

(4) 1M 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) 16K/32K x 8

CACHE JUMPER CONFIGURATION

Size

JP11

JP12

64KB

Open

Open

128KB

Pins 1 & 2 closed

Closed

256KB

Pins 2 & 3 closed

Closed

CPU SPEED SELECTION

Speed

JP4

JP5

JP6

20MHz

Closed

Closed

Open

25MHz

Closed

Open

Closed

33MHz

Open

Closed

Closed

40MHz

Closed

Open

Open

50iMHz

Closed

Open

Closed

50MHz

Open

Closed

Open

66iMHz

Open

Closed

Closed

CPU TYPE SELECTION

Type

JP7

JP8

80486SX

Pins 2 & 3 closed

Open

80486SX2

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

80487SX

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

ODP486 168-pin

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

ODP486 169-pin

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

80486DX

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

80486DX2

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

80486DX3

Pins 1 & 2, 3 & 4 closed

Pins 1 & 2 closed

P24T

Pins 1 & 2, 3 & 4 closed

Pins 2 & 3 closed

VL BUS WAIT STATE SELECTION

Setting

JP13

0

Open

1

Closed

VL BUS SPEED SELECTION

Speed

JP14

<= 33MHz

Open

>33 MHz

Closed