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US3486-33/50C(USAi)

UNIDENTIFIED

US3486-33/50C(USAi)

Processor

80386SX/80386DX/CX486DLC/80486SX/80486DX/80486DX2

Processor Speed

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

Chip Set

USAi

Max. Onboard DRAM

32MB

Cache

64/128/256KB

BIOS

AMI

Dimensions

230mm x 218mm

I/O Options

32-bit VESA local bus slots (2)

NPU Options

80387

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J2

External battery

J7

Turbo switch

J4

Speaker

J100

Turbo LED

J5

32-bit VESA Local bus slots

SL1 & SL2

Reset switch

J6

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select monochrome

J3

Open

 

Monitor type select color

J3

Closed

CMOS memory normal operation (Internal Battery)

JMP3

pins 2 & 3 closed

 

CMOS memory normal operation (External Battery)

JMP3

pins 1 & 2 closed

 

CMOS memory clear

JMP3

pins 2 & 4 closed

NPU disabled

JMP4

pins 2 & 3 closed

 

NPU enabled

JMP4

pins 1 & 2 closed

CPU type select 80386DX not installed

JMP5

Open

 

CPU type select 80386DX installed

JMP5

Closed

CPU type select 80486DX-50 not installed

JMP7

Open

 

CPU type select 80486DX-50 installed

JMP7

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

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

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) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JMP1

JMP8

64KB

pins 1 & 2, 4 & 5, 7 & 8 closed

pins 1 & 2, 4 & 5 closed

128KB

pins 2 & 3, 5 & 6, 8 & 9 closed

pins 2 & 3, 5 & 6 closed

256KB

pins 2 & 3, 5 & 6, 8 & 9 closed

pins 2 & 3, 5 & 6 closed

CPU TYPE CONFIGURATION

Type

JMP10

JMP12

80386

pins 2 & 5, 3 & 6 closed

Open

80486

Open

Closed

CPU TYPE CONFIGURATION

Type

JMP2

80486SX

pins 1 & 2 closed

80486DX

pins 2 & 3 closed

CPU SPEED CONFIGURATION

Speed

JMP9

20MHz

pins 2 & 6, 3 & 7 closed

25MHz

pins 2 & 6, 4 & 8 closed

33MHz

pins 3 & 7, 4 & 8 closed

40MHz

pins 2 & 6 closed

50MHz

pins 3 & 7 closed

66iMHz

pins 1 & 5, 3 & 7, 4 & 8 closed

VESA BUS SPEED CONFIGURATION

Speed

JMP6

80486DX-33/DX2-66

pins 1 & 4, 3 & 6 closed

80486DX-50

pins 1 & 4 closed