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





U 6921

ATC/UNITRON COMPUTERS & COMPUTER PARTS

U 6921

Processor

umc486/(SL)AM486SX/80486SX/SL80486SX/CXM7/AM486DX/(SL)AM486DX/80486DX/SL80486DX/AM486DX2/(SL)AM486D2/80486DX2/SL80486DX2/ AM486DX4/(SL)486DX4/80486DX4/SL80486DX4/CXM9/P24D/P24T

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/100(internal)MHz

Chip Set

SIS

Max. Onboard DRAM

128MB

Cache

128/256/512KB

BIOS

Award

Dimensions

220mm x 220mm

I/O Options

32-bit PCI slots (3), green PC connector, IDE interfaces (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

External battery

JP1

Turbo LED

JP38

IDE interface 2

JP7

Reset switch

JP39

IDE interface 1

JP8

Turbo switch

JP40

Speaker

JP28

Power LED & keylock

JP41

IDE interface LED

JP32

Green PC LED

LED1

Green PC connector

JP36

32-bit PCI slots

PC1 - PC3

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Ľ

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

Ľ

Factory configured - do not alter

JP14

N/A

Ľ

Factory configured - do not alter

JP15

N/A

Ľ

Flash BIOS EPROM

JP21

Open

 

Flash BIOS voltage select 12v

JP21

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP21

Pins 2 & 3 closed

 

Turbo enabled

JP40

Pins 2 & 3 closed

 

Turbo disabled

JP40

Pins 1 & 2 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

Bank 3

1MB

(1) 256K x 36

None

None

None

2MB

(1) 512K x 36

None

None

None

2MB

(1) 256K x 36

(1) 256K x 36

None

None

3MB

(1) 512K x 36

(1) 256K x 36

None

None

3MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

None

3MB

(1) 256K x 36

(1) 512K x 36

None

None

4MB

(1) 1M x 36

None

None

None

4MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

None

4MB

(1) 512K x 36

(1) 512K x 36

None

None

4MB

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 1M x 36

(1) 256K x 36

None

None

5MB

(1) 512K x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

5MB

(1) 256K x 36

(1) 512K x 36

(1) 512K x 36

None

5MB

(1) 256K x 36

(1) 1M x 36

None

None

6MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

None

6MB

(1) 1M x 36

(1) 512K x 36

None

None

6MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

None

6MB

(1) 512K x 36

(1) 1M x 36

None

None

7MB

(1) 1M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

7MB

(1) 256K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

8MB

(1) 2M x 36

None

None

None

8MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

None

8MB

(1) 1M x 36

(1) 1M x 36

None

None

8MB

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

9MB

(1) 2M x 36

(1) 256K x 36

None

None

9MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

None

9MB

(1) 256K x 36

(1) 2M x 36

None

None

10MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

None

10MB

(1) 2M x 36

(1) 512K x 36

None

None

10MB

(1) 1M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

10MB

(1) 512K x 36

(1) 1M x 36

(1) 1M x 36

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

10MB

(1) 512K x 36

(1) 2M x 36

None

None

11MB

(1) 2M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

12MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

None

12MB

(1) 2M x 36

(1) 1M x 36

None

None

12MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

None

12MB

(1) 1M x 36

(1) 2M x 36

None

None

13MB

(1) 256K x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

14MB

(1) 2M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

14MB

(1) 512K x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

16MB

(1) 4M x 36

None

None

None

16MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

None

16MB

(1) 2M x 36

(1) 2M x 36

None

None

16MB

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

17MB

(1) 4M x 36

(1) 256K x 36

None

None

17MB

(1) 256K x 36

(1) 2M x 36

(1) 2M x 36

None

17MB

(1) 256K x 36

(1) 4M x 36

None

None

18MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

None

18MB

(1) 4M x 36

(1) 512K x 36

None

None

18MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

None

18MB

(1) 512K x 36

(1) 4M x 36

None

None

19MB

(1) 4M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

20MB

(1) 4M x 36

(1) 512K x 36

(1) 512K x 36

None

20MB

(1) 4M x 36

(1) 1M x 36

None

None

20MB

(1) 2M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

20MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

None

20MB

(1) 1M x 36

(1) 4M x 36

None

None

22MB

(1) 4M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

24MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

None

24MB

(1) 4M x 36

(1) 2M x 36

None

None

24MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

None

24MB

(1) 2M x 36

(1) 4M x 36

None

None

25MB

(1) 256K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

26MB

(1) 512K x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

28MB

(1) 4M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

28MB

(1) 1M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

32MB

(1) 8M x 36

None

None

None

32MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

None

32MB

(1) 4M x 36

(1) 4M x 36

None

None

32MB

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

33MB

(1) 8M x 36

(1) 256K x 36

None

None

33MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

None

33MB

(1) 256K x 36

(1) 8M x 36

None

None

34MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

None

DRAM CONFIGURATION (CONíT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

34MB

(1) 8M x 36

(1) 512K x 36

None

None

34MB

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

None

34MB

(1) 512K x 36

(1) 8M x 36

None

None

35MB

(1) 8M x 36

(1) 256K x 36

(1) 256K x 36

(1) 256K x 36

36MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

None

36MB

(1) 8M x 36

(1) 1M x 36

None

None

36MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

None

36MB

(1) 1M x 36

(1) 8M x 36

None

None

38MB

(1) 8M x 36

(1) 512K x 36

(1) 512K x 36

(1) 512K x 36

40MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

None

40MB

(1) 8M x 36

(1) 2M x 36

None

None

40MB

(1) 4M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

40MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

None

40MB

(1) 2M x 36

(1) 8M x 36

None

None

44MB

(1) 8M x 36

(1) 1M x 36

(1) 1M x 36

(1) 1M x 36

48MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

None

48MB

(1) 8M x 36

(1) 4M x 36

None

None

48MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

None

48MB

(1) 4M x 36

(1) 8M x 36

None

None

49MB

(1) 256K x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

50MB

(1) 512K x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

52MB

(1) 1M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

56MB

(1) 8M x 36

(1) 2M x 36

(1) 2M x 36

(1) 2M x 36

56MB

(1) 2M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

64MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

None

64MB

(1) 8M x 36

(1) 8M x 36

None

None

64MB

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

65MB

(1) 256K x 36

(1) 8M x 36

(1) 8M x 36

None

66MB

(1) 512K x 36

(1) 8M x 36

(1) 8M x 36

None

68MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

None

72MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

None

80MB

(1) 8M x 36

(1) 4M x 36

(1) 4M x 36

(1) 4M x 36

80MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

None

96MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

None

97MB

(1) 256K x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

98MB

(1) 512K x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

100MB

(1) 1M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

104MB

(1) 2M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

112MB

(1) 4M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

128MB

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

(1) 8M x 36

CACHE CONFIGURATION

Size

Bank 0

TAG

128KB

(4) 32K x 8

(1) 8K x 8

256KB

(4) 64K x 8

(1) 32K x 8

512KB

(4) 128K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP9

JP10

128KB

Pins 1 & 2 closed

Pins 1 & 2 closed

256KB

Pins 2 & 3 closed

Pins 1 & 2 closed

512KB

Pins 2 & 3 closed

Pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP11

JP12

JP17

JP18

JP19

UMC486

2 & 3

Open

Open

Open

Open

(SL)AM486SX

2 & 3

2 & 3

Open

2 & 3

1 & 2

804846SX

Open

2 & 3

Open

Open

Open

SL804846SX

Open

2 & 3

Open

Open

Open

CXM7

2 & 3

2 & 3

Open

Open

Open

AM486DX

2 & 3

2 & 3

Open

Open

1 & 2

(SL)AM486DX

2 & 3

2 & 3

Open

2 & 3

1 & 2

80486DX

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX

2 & 3

2 & 3

Open

Open

Open

AM486DX2

2 & 3

2 & 3

Open

Open

2 & 3

(SL)AM486DX2

2 & 3

2 & 3

Open

2 & 3

1 & 2

80486DX2

2 & 3

2 & 3

Open

Open

Open

SL80486DX2

2 & 3

2 & 3

Open

Open

Open

AM486DX4

2 & 3

2 & 3

Open

Open

1 & 2

(SL)AM486DX4

2 & 3

2 & 3

Open

2 & 3

1 & 2

80486DX4 (2x)

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX4 (2x)

2 & 3

2 & 3

Open

Open

Open

80486DX4 (2.5x)

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX4 (2.5x)

2 & 3

2 & 3

Open

Open

Open

80486DX4 (3x)

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX4 (3x)

2 & 3

2 & 3

Open

Open

Open

CXM9 (2x)

2 & 3

1 & 2

Open

1 & 2

Open

CXM9 (3x)

2 & 3

1 & 2

Open

1 & 2

Open

P24D (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

P24D (WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

P24T (WB)

1 & 2

1 & 2

2 & 3

Open

Open

P24T (WT)

1 & 2

1 & 2

1 & 2

Open

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JP20

JP22

JP23

JP24

JP25

UMC486

Open

Open

Open

Open

Open

(SL)AM486SX

2 & 3

Closed

Open

4 & 5

4 & 5

804846SX

Open

Open

Open

Open

Open

SL804846SX

2 & 3

Closed

Open

1 & 2

4 & 5

CXM7

1 & 2

Closed

Open

Open

2 & 3

AM486DX

Open

Open

Open

Open

4 & 5

(SL)AM486DX

2 & 3

Closed

Open

4 & 5

4 & 5

80486DX

Open

Open

Open

Open

4 & 5

SL80486DX

2 & 3

Closed

Open

1 & 2

4 & 5

AM486DX2

Open

Open

Open

Open

4 & 5

(SL)AM486DX2

2 & 3

Closed

Open

4 & 5

4 & 5

80486DX2

2 & 3

Closed

Open

1 & 2

4 & 5

SL80486DX2

2 & 3

Closed

Open

1 & 2

4 & 5

AM486DX4

Open

Open

Open

Open

4 & 5

(SL)AM486DX4

2 & 3

Closed

Open

4 & 5

4 & 5

80486DX4 (2x)

Open

Open

Open

Open

4 & 5

SL80486DX4 (2x)

2 & 3

Closed

Open

1 & 2

4 & 5

80486DX4 (2.5x)

Open

Open

Open

Open

4 & 5

SL80486DX4 (2.5x)

2 & 3

Closed

Open

1 & 2

4 & 5

80486DX4 (3x)

Open

Open

Open

Open

4 & 5

SL80486DX4 (3x)

2 & 3

Closed

Open

1 & 2

4 & 5

CXM9 (2x)

Open

Closed

Open

2 & 3

2 & 3

CXM9 (3x)

Open

Closed

Open

2 & 3

2 & 3

P24D (WB)

2 & 3

Closed

Open

2 & 3

4 & 5

P24D (WT)

2 & 3

Closed

Open

2 & 3

4 & 5

P24T (WB)

2 & 3

Closed

Open

Open

1 & 2

P24T (WT)

2 & 3

Closed

Open

Open

1 & 2

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONíT)

Type

JP26

JP27

JP29

JP33

JP34

UMC486

2 & 3

Open

Open

Open

Open

(SL)AM486SX

2 & 3

3 & 4

Open

Open

1 & 2

804846SX

2 & 3

Open

Open

Open

Open

SL804846SX

2 & 3

3 & 4

Open

Open

Open

CXM7

1 & 2, 3 & 4

2 & 3

Open

2 & 3

2 & 3

AM486DX

1 & 2, 3 & 4

3 & 4

Open

Open

Open

(SL)AM486DX

1 & 2, 3 & 4

3 & 4

Open

Open

1 & 2

80486DX

1 & 2, 3 & 4

3 & 4

Open

Open

Open

SL80486DX

1 & 2, 3 & 4

3 & 4

Open

Open

Open

AM486DX2

1 & 2, 3 & 4

3 & 4

Open

Open

Open

(SL)AM486DX2

1 & 2, 3 & 4

3 & 4

Open

Open

1 & 2

80486DX2

1 & 2, 3 & 4

3 & 4

Open

Open

Open

SL80486DX2

1 & 2, 3 & 4

3 & 4

Open

Open

Open

AM486DX4

1 & 2, 3 & 4

3 & 4

Open

Open

Open

(SL)AM486DX4

1 & 2, 3 & 4

3 & 4

Open

Open

1 & 2

80486DX4 (2x)

1 & 2, 3 & 4

3 & 4

2 & 3

Open

Open

SL80486DX4 (2x)

1 & 2, 3 & 4

3 & 4

2 & 3

Open

Open

80486DX4 (2.5x)

1 & 2, 3 & 4

3 & 4

1 & 2

Open

Open

SL80486DX4 (2.5x)

1 & 2, 3 & 4

3 & 4

1 & 2

Open

Open

80486DX4 (3x)

1 & 2, 3 & 4

3 & 4

Open

Open

Open

SL80486DX4 (3x)

1 & 2, 3 & 4

3 & 4

Open

Open

Open

CXM9 (2x)

1 & 2, 3 & 4

1 & 2, 3 & 4

2 & 3

Open

1 & 2

CXM9 (3x)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

Open

1 & 2

P24D (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

Open

1 & 2

P24D (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

Open

1 & 2

P24T (WB)

1 & 2, 3 & 4

3 & 4

Open

1 & 2

1 & 2

P24T (WT)

1 & 2, 3 & 4

3 & 4

Open

1 & 2

1 & 2

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP13

JP16

25MHz

Pins 1 & 2 closed

Open

33MHz

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

40MHz

Pins 2 & 3 closed

Pins 1 & 2 closed

50iMHz

Pins 1 & 2 closed

Open

50MHz

Pins 2 & 3 closed

Pins 3 & 4 closed

66iMHz

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

75iMHz

Pins 1 & 2 closed

Open

100iMHz

Pins 1 & 2 closed

Pins 1 & 2, 3 & 4 closed

CPU VOLTAGE CONFIGURATION

Voltage

JP30

JP31

JP35

3.3v

Pins 2 & 3 closed

Pins 5 & 6 closed

Pins 2 & 3 closed

3.45v

Pins 2 & 3 closed

Pins 3 & 4 closed

Pins 2 & 3 closed

4v

Pins 2 & 3 closed

Pins 1 & 2 closed

Pins 2 & 3 closed

5v

Pins 1 & 2 closed

Any setting

Pins 1 & 2 closed

BIOS CONFIGURATION

Setting

JP2

JP3

CMOS memory normal operation

Pins 1 & 2 closed

Pins 1 & 2 closed

CMOS memory clear

Pins 2 & 3 closed

Pins 2 & 3 closed

GREEN PC CONFIGURATION

Setting

JP37

Doze mode

Pins 1 & 2 closed

Suspend mode

Pins 3 & 4 closed

Standby mode

Pins 5 & 6, 7 & 8 closed