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





486UV AT

BUFFALO PRODUCTS, INC.

486UV AT

Processor

80486SX/80487SX/80486DX

Processor Speed

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

Chip Set

UMC

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI/Phoenix

Dimensions

330mm x 218mm

I/O Options

32-bit system memory card, 32-bit local bus slot

NPU Options

4167

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

J1

Turbo switch

J6

Power LED & keylock

J3

Turbo LED

J7

Speaker

J4

32-bit system memory card

JME1

Reset switch

J5

32-bit VESA Local bus slot

SL1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP10

Open

 

Monitor type select monochrome

JP10

Closed

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

5MB

(4) 256K x 9

(4) 1M x 9

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

DRAM CONFIGURATION (WITH MEMORY CARD INSTALLED)

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(4) 256K x 9

NONE

NONE

NONE

2MB

(4) 256K x 9

(4) 256K x 9

NONE

NONE

3MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

NONE

4MB

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

(4) 256K x 9

4MB

(4) 1M x 9

NONE

NONE

NONE

5MB

(4) 256K x 9

(4) 1M x 9

NONE

NONE

6MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

NONE

8MB

(4) 1M x 9

(4) 1M x 9

NONE

NONE

9MB

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

(4) 1M x 9

10MB

(4) 256K x 9

(4) 256K x 9

(4) 1M x 9

(4) 1M x 9

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

32MB

(4) 4M x 9

(4) 4M x 9

NONE

NONE

36MB

NONE

(4) 4M x 9

(4) 4M x 9

NONE

40MB

NONE

NONE

(4) 4M x 9

(4) 4M x 9

48MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

NONE

64MB

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

(4) 4M x 9

CACHE CONFIGURATION

Size

Bank 0

Bank 1

64KB

(4) 8K x 8

(4) 8K x 8

128KB

(4) 32K x 8

NONE

256KB

(4) 32K x 8

(4) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP13

JP14

JP16

JP17

JP18

64KB

1 & 2

1 & 2

2 & 3

1 & 2

1 & 2

128KB

2 & 3

1 & 2

2 & 3

2 & 3

1 & 2

256KB

1 & 2

2 & 3

2 & 3

2 & 3

2 & 3

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP1

JP2

JP3

JP8

20MHz

Open

pins 2 & 3 closed

pins 3 & 4 closed

See note

25MHz

Open

pins 2 & 3 closed

pins 3 & 4 closed

See note

33MHz

Closed

pins 1 & 2 closed

pins 1 & 2 closed

Open

50MHz

Closed

pins 1 & 2 closed

pins 1 & 2 closed

Open

Note:For 20MHz 486SX/487SX CPU, U14 oscillator frequency can be 20MHz or 40mhz. If U14 oscillator frequency is 20mhz, open JP8. If U14 oscillator frequency is 40 Mhz, close JP8

VESA CONFIGURATION

Type

JP23

JP24

JP25

Weitek 4167 installed

Open

Closed

Open

Local bus installed

Closed

Open

Open

Weitek & Local bus installed

Open

Open

Closed