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





GA-386UM 33/40 MAIN BOARD

GIGA-BYTE TECHNOLOGY CO., LTD

GA-386UM 33/40 MAIN BOARD

Processor

80386DX

Processor Speed

33/40MHz

Chip Set

OPTI

Max. Onboard DRAM

32MB

SRAM Cache

64/128/256KB

BIOS

AMI

Dimensions

220mm x 260mm

I/O Options

None

NPU Options

80387/3167

CONNECTIONS

Purpose

Location

Purpose

Location

Power LED & keylock

J1

Turbo switch

J4

Speaker

J2

Turbo LED

J5

Reset switch

J3

External battery

J11

Note:Board may be supplied with either a PGA (socketed) or PQFP (surface mounted) CPU.

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

NPU absent

J7

open

 

NPU present

J7

closed

Monitor type select color

J8

closed

 

Monitor type select monochrome

J8

open

CMOS memory normal operation

J9

pins 2 & 3 closed

 

CMOS memory clear

J9

pins 1 & 2 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

SRAM CONFIGURATION

Size

Cache SRAM

Location

TAG

64KB

(8) 8K x 8

Banks 0 & 1

(1) 8K x 8

128KB

(4) 32K x 8

Bank 0

(1) 8K x 8

256KB

(8) 32K x 8

Banks 0 & 1

(1) 32K x 8

SRAM JUMPER CONFIGURATION

Size

WC1

WC2

WC3

WC4

WC5

64KB

pins 2 & 3 closed

open

open

pins 1 & 2 closed

pins 1 & 2 closed

128KB

pins 1 & 2 closed

open

closed

pins 2 & 3 closed

pins 1 & 2 closed

256KB

pins 2 & 3 closed

closed

closed

pins 2 & 3 closed

pins 2 & 3 closed