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U6978

ATC/UNITRON COMPUTER & COMPUTER PARTS

U6978

Processor

AMD K5/Pentium

Processor Speed

75/90/100MHz

Chip Set

Unidentified

Max. Onboard DRAM

128MB

Cache

64/256/512/1024KB

BIOS

Award

Dimensions

330mm x 218mm

I/O Options

32-bit PCI slots (4), green PC connector, floppy drive interface, IDE interfaces (2), parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

J1

Reset switch

J9

Serial port 2

J2

IDE interface LED

JP26

Floppy drive interface

J3

Green PC connector

JP28

Parallel port

J4

Turbo LED

JP29

IDE interface 1

J5

Turbo switch

JP30

IDE interface 2

J6

Green PC connector

JP31

Speaker

J7

32-bit PCI slots

PC1 - PC4

Power LED & keylock

J8

 

 

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

ECP/EPP signal select DREQ1

JP1

pins 1 & 3 closed

 

ECP/EPP signal select DREQ3

JP1

pins 2 & 4 closed

ECP/EPP signal select DACK1

JP2

pins 1 & 4 closed

 

ECP/EPP signal select DACK3

JP2

pins 2 & 5 closed

Monitor type select color

JP3

Closed

 

Monitor type select monochrome

JP3

Open

Factory configured - do not alter

JP4

N/A

BIOS type select EPROM

JP6

Open

 

BIOS type select 5v flash

JP6

pins 2 & 3 closed

 

BIOS type select 12v flash

JP6

pins 1 & 2 closed

Factory configured - do not alter

JP7

N/A

CMOS memory normal operation

JP8

Open

 

CMOS memory clear

JP8

Closed

Factory configured - do not alter

JP11

N/A

L1 invalidate cycle select master write cycles force invalidation

JP16

pins 2 & 3 closed

 

L1 invalidate cycle select every cycle with W/R# force invalidation

JP16

pins 1 & 2 closed

Pipeline disabled

JP17

pins 2 & 3 closed

 

Pipeline enabled

JP17

pins 1 & 2 closed

Cache type select write back

JP21

pins 1 & 2 closed

 

Cache type select write through

JP21

pins 2 & 3 closed

Turbo enabled

JP30

pins 1 & 2 closed

 

Turbo disabled

JP30

pins 2 & 3 closed

DRAM CONFIGURATION 1

Size

Bank 0

Bank 1

2MB

(2) 256K x 36

NONE

4MB

(2) 512K x 36

NONE

8MB

(2) 1M x 36

NONE

16MB

(2) 2M x 36

NONE

32MB

(2) 4M x 36

NONE

64MB

(2) 8M x 36

NONE

128MB

(2) 16M x 36

NONE

DRAM CONFIGURATION 2

Size

Bank 0

Bank 1

4MB

(2) 256K x 36

(2) 256K x 36

16MB

(2) 1M x 36

(2) 1M x 36

64MB

(2) 4M x 36

(2) 4M x 36

DRAM CONFIGURATION 3

Size

Bank 0

Bank 1

12MB

(2) 512K x 36

(2) 1M x 36

36MB

(2) 512K x 36

(2) 4M x 36

8MB

(2) 512K x 36

(2) 512K x 36

20MB

(2) 512K x 36

(2) 2M x 36

48MB

(2) 2M x 36

(2) 4M x 36

32MB

(2) 2M x 36

(2) 2M x 36

80MB

(2) 2M x 36

(2) 8M x 36

128MB

(2) 8M x 36

(2) 8M x 36

DRAM JUMPER CONFIGURATION

Configuration

JP9

1

pins 1 & 2 OR 2 & 3 closed

2

pins 1 & 2 closed

3

pins 2 & 3 closed

CACHE CONFIGURATION

Size

Bank 0

TAG

64KB

(8) 8K x 8

(1) 8K x 8

256KB

(8) 32K x 8

(1) 8K x 8

512KB

(8) 64K x 8

(1) 16K x 8

1MB

(8) 128K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP13

JP14

JP19

JP20

64KB

Open

Open

Open

Open

256KB

Open

Open

Closed

Closed

512KB

Open

Closed

Closed

Closed

1MB

Closed

Closed

Closed

Closed

CACHE VOLTAGE CONFIGURATION

Voltage

JP15

JP18

JP25

Mixed voltage

pins 1 & 2 closed

pins 1 & 2 closed

pins 1 & 2 closed

3.3v

pins 2 & 3 closed

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP23

JP24

JP27

AMD K5

Open

Open

Open

Pentium

Closed

Closed

Closed

CPU SPEED CONFIGURATION

Speed

JP10

JP12

75MHz

Open

Open

90MHz

Open

Closed

100MHz

Closed

Closed

CPU SPEED CONFIGURATION (AMD K5)

Speed

JP22

1x

pins 2 & 3 closed

1.5x/2x/3x

pins 1 & 2 closed

CPU SPEED CONFIGURATION (PENTIUM)

Speed

JP22

1.5x

pins 1 & 2 closed

2x

pins 2 & 3 closed

PCI IDE CONFIGURATION

Base address

JP5

Enabled

pins 1 & 2 open

Disabled

pins 1 & 2 closed

PCI IDE CONFIGURATION

1st IDE channel

JP5

Enabled

pins 3 & 4 open

Disabled

pins 3 & 4 closed

PCI IDE CONFIGURATION

2nd IDE channel

JP5

Enabled

pins 5 & 6 closed

Disabled

pins 5 & 6 open

PCI IDE CONFIGURATION

External D/FF

JP5

Needed

pins 9 & 10 open

Not needed

pins 9 & 10 closed