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U 6923

ATC/UNITRON COMPUTER & COMPUTER PARTS

U 6923

Processor

(SL)AM486SX/80486SX/SL80486SX/UMC486/CXM7/AM486DX/(SL)AM486DX/80486DX/SL80486DX/AM486DX2/(SL)AM486DX2/80486DX2/SL80486DX2/ AM486DX4/(SL)AM486DX4/80486DX4/SL80486DX4/CXM9/P24D/ Pentium Overdrive

Processor Speed

25/33/40/50(internal)/50/66(internal)/80(internal)/100(internal)/ 120(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), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2)

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Parallel port

CN1

Green PC connector

JP35

IDE interface 2

CN2

Green PC connector

JP36

IDE interface 1

CN3

Turbo LED

JP37

Floppy drive interface

CN4

Reset switch

JP38

Serial port 1

CN5

Turbo switch

JP39

Serial port 2

CN6

Power LED & keylock

JP40

External battery

JP1

Green PC LED

LED1

Speaker

JP27

32-bit PCI slots

PC1 - PC3

IDE interface LED

JP33

   

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

Monitor type select color

JP6

Closed

 

Monitor type select monochrome

JP6

Open

Factory configured - do not alter

JP13

N/A

DREQ select DREQ1

JP18

pins 1 & 3 closed

 

DREQ select DREQ3

JP18

pins 2 & 4 closed

BIOS type select EPROM

JP19

Open

 

BIOS type select 5v flash

JP19

pins 2 & 3 closed

 

BIOS type select 12v flash

JP19

pins 1 & 2 closed

DACK select DACK1

JP22

pins 1 & 3 closed

 

DACK select DACK3

JP22

pins 2 & 4 closed

 

Turbo enabled

JP39

pins 2 & 3 closed

 

Turbo disabled

JP39

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

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

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

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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

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

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

Bank 2

Bank 3

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) 16K x 8

512KB

(4) 128K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

JP7

JP8

128KB

pins 1 & 2 closed

pins 1 & 2 closed

256KB

pins 1 & 2 closed

pins 2 & 3 closed

512KB

pins 2 & 3 closed

pins 2 & 3 closed

CPU TYPE CONFIGURATION

Type

JP9

JP10

JP14

JP15

JP16

(SL)AM486SX (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

(SL)AM486SX (WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

80486SX

Open

2 & 3

Open

Open

Open

SL80486SX

Open

2 & 3

Open

Open

Open

UMC486

2 & 3

Open

Open

Open

Open

CXM7

2 & 3

2 & 3

Open

Open

Open

AM486DX

2 & 3

2 & 3

Open

Open

1 & 2

(SL)AM486DX (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

(SL)AM486DX (WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

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 (WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

(SL)AM486DX2 (WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

80486DX2

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX2

2 & 3

2 & 3

Open

Open

Open

AM486DX4

2 & 3

2 & 3

Open

Open

1 & 2

(SL)AM486DX4 (2x WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

(SL)AM486DX4 (3x WB)

2 & 3

1 & 2

Open

1 & 2

1 & 2

(SL)AM486DX4 (2x WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

(SL)AM486DX4 (3x WT)

2 & 3

1 & 2

Open

1 & 2

2 & 3

80486DX4 (2x)

2 & 3

2 & 3

Open

Open

1 & 2

80486DX4 (2.5x)

2 & 3

2 & 3

Open

Open

1 & 2

80486DX4 (3x)

2 & 3

2 & 3

Open

Open

1 & 2

SL80486DX4 (2x)

2 & 3

2 & 3

Open

Open

Open

SL80486DX4 (2.5x)

2 & 3

2 & 3

Open

Open

Open

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

1 & 2

Open

Open

P24T (WT)

1 & 2

1 & 2

2 & 3

Open

Open

Note: Pins designated should be in the closed position.

CPU TYPE CONFIGURATION (CONT)

Type

JP17

JP20

JP21

JP23

JP24

(SL)AM486SX (WB)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486SX (WT)

2 & 3

Closed

Open

2 & 3

4 & 5

80486SX

Open

Open

Open

Open

Open

SL80486SX

2 & 3

Closed

Open

1 & 2

4 & 5

UMC486

Open

Open

Open

Open

Open

CXM7

1 & 2

Closed

Open

Open

2 & 3

AM486DX

Open

Open

Open

Open

4 & 5

(SL)AM486DX (WB)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486DX (WT)

2 & 3

Closed

Open

2 & 3

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 (WB)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486DX2 (WT)

2 & 3

Closed

Open

2 & 3

4 & 5

80486DX2

Open

Open

Open

Open

4 & 5

SL80486DX2

2 & 3

Closed

Open

1 & 2

4 & 5

AM486DX4

Open

Open

Open

Open

4 & 5

(SL)AM486DX4 (2x WB)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486DX4 (3x WB)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486DX4 (2x WT)

2 & 3

Closed

Open

2 & 3

4 & 5

(SL)AM486DX4 (3x WT)

2 & 3

Closed

Open

2 & 3

4 & 5

80486DX4 (2x)

Open

Open

Open

Open

4 & 5

80486DX4 (2.5x)

Open

Open

Open

Open

4 & 5

80486DX4 (3x)

Open

Open

Open

Open

4 & 5

SL80486DX4 (2x)

2 & 3

Closed

Open

1 & 2

4 & 5

SL80486DX4 (2.5x)

2 & 3

Closed

Open

1 & 2

4 & 5

SL80486DX4 (3x)

2 & 3

Closed

Open

1 & 2

4 & 5

CXM9 (2x)

2 & 3

Closed

Open

2 & 3

4 & 5

CXM9 (3x)

2 & 3

Closed

Open

2 & 3

4 & 5

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 (CONT)

Type

JP25

JP26

JP28

JP29

JP30

(SL)AM486SX (WB)

2 & 3

1 & 2, 3 & 4

Open

1 & 2

Open

(SL)AM486SX (WT)

2 & 3

1 & 2, 3 & 4

Open

1 & 2

Open

80486SX

2 & 3

Open

Open

Open

Open

SL80486SX

2 & 3

3 & 4

Open

Open

Open

UMC486

2 & 3

Open

Open

Open

Open

CXM7

1 & 2, 3 & 4

2 & 3

2 & 3

2 & 3

Open

AM486DX

1 & 2, 3 & 4

3 & 4

Open

Open

Open

(SL)AM486DX (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

(SL)AM486DX (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

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 (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

(SL)AM486DX2 (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

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 (2x WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

2 & 3

(SL)AM486DX4 (3x WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

(SL)AM486DX4 (2x WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

2 & 3

(SL)AM486DX4 (3x WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

80486DX4 (2x)

1 & 2, 3 & 4

3 & 4

Open

Open

2 & 3

80486DX4 (2.5x)

1 & 2, 3 & 4

3 & 4

Open

Open

1 & 2

80486DX4 (3x)

1 & 2, 3 & 4

3 & 4

Open

Open

Open

SL80486DX4 (2x)

1 & 2, 3 & 4

3 & 4

Open

Open

2 & 3

SL80486DX4 (2.5x)

1 & 2, 3 & 4

3 & 4

Open

Open

1 & 2

SL80486DX4 (3x)

1 & 2, 3 & 4

3 & 4

Open

Open

Open

CXM9 (2x)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

2 & 3

CXM9 (3x)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

P24D (WB)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

P24D (WT)

1 & 2, 3 & 4

1 & 2, 3 & 4

Open

1 & 2

Open

P24T (WB)

1 & 2, 3 & 4

3 & 4

1 & 2

1 & 2

Open

P24T (WT)

1 & 2, 3 & 4

3 & 4

1 & 2

1 & 2

Open

Note: Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

Speed

JP11

JP12

25MHz

pins 1 & 2 closed

Open

33MHz

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

40MHz

pins 1 & 2 closed

pins 2 & 3 closed

50iMHz

pins 1 & 2 closed

Open

50MHz

pins 3 & 4 closed

pins 2 & 3 closed

66iMHz

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

80iMHz

pins 1 & 2 closed

pins 2 & 3 closed

100iMHz

pins 1 & 2, 3 & 4 closed

pins 1 & 2 closed

120iMHz

pins 1 & 2 closed

pins 2 & 3 closed

CPU VOLTAGE CONFIGURATION

Voltage

JP31

JP32

JP34

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

N/A

pins 1 & 2 closed

GREEN PC CONFIGURATION

Setting

JP36

Doze mode

pins 1 & 2 closed

Suspend mode

pins 3 & 4 closed

Standby mode

pins 5 & 6, 7 & 8 closed

CMOS 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