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DC-420

DASH COMPUTER, INC.

DC-420

Processor

CX486DX/IBM486DX/TI486DX/SGS486DX/80486DX/AM486DX2/ (SL)486DX2/CX486DX2/IBM486DX2/TI486DX2/SGS486DX2/ 80486DX2/CX486DX4/IBM486DX4/TI486DX4/SGS486DX4/ AM486DX4/(SL)AM486DX4/SL80486DX4/P24D/CX5X86/AM X5

Processor Speed

25/33/40/50(internal)/50/66(internal)/75(internal)/80(internal)/ 100(internal)/120(internal)/133(internal)MHz

Chip Set

UMC

Video Chip Set

None

Maximum Onboard Memory

128MB

Maximum Video Memory

None

Cache

128/256/512/1024KB

BIOS

AMI

Dimensions

250mm x 220mm

I/O Options

32-bit VESA local bus slot, 32-bit PCI slots (3), floppy drive interface, green PC connector, IDE interfaces (2), parallel port, serial ports (2), cache slot

NPU Options

None

CONNECTIONS

Purpose

Location

Purpose

Location

Serial port 1

CN1

Turbo LED

J10

Serial port 2

CN2

Reset switch

J11

Parallel port

CN3

Turbo switch

J12

Floppy drive interface

CN4

IDE interface LED

J13

IDE interface 1

CN5

Green PC connector

J14

IDE interface 2

CN6

32-bit PCI slots

PC1 - PC3

External battery

J4

32-bit VESA local bus slot

SL1

Power LED & keylock

J8

Cache slot

SL2

Speaker

J9

   

USER CONFIGURABLE SETTINGS

Function

Label

Position

 

Battery type select internal

J4

Pins 2 & 3 closed

 

Battery type select external

J4

Closed

 

CMOS memory clear

J4

Pins 3 & 4 closed

Factory configured - do not alter

JP1

Unidentified

 

Flash BIOS voltage select 12v

JP2

Pins 1 & 2 closed

 

Flash BIOS voltage select 5v

JP2

Pins 2 & 3 closed

DRAM CONFIGURATION

Size

Bank 0

Bank 1

Bank 2

1MB

(4) 256K x 9

None

None

1MB

None

(1) 256K x 36

None

2MB

None

(1) 512K x 36

None

3MB

(4) 256K x 9

(1) 256K x 36

(1) 256K x 36

3MB

(4) 256K x 9

None

(1) 512K x 36

4MB

(4) 256K x 9

(1) 256K x 36

(1) 512K x 36

4MB

(4) 1M x 9

None

None

4MB

None

(1) 512K x 36

(1) 512K x 36

4MB

None

(1) 1M x 36

None

4MB

None

None

(1) 1M x 36

5MB

(4) 256K x 9

(1) 1M x 36

None

5MB

(4) 256K x 9

None

(1) 1M x 36

5MB

None

(1) 1M x 36

(1) 256K x 36

6MB

(4) 1M x 9

None

(1) 512K x 36

8MB

(4) 1M x 9

(1) 1M x 36

None

8MB

(4) 1M x 9

None

(1) 1M x 36

8MB

None

(1) 1M x 36

(1) 1M x 36

8MB

None

(1) 2M x 36

None

8MB

None

None

(1) 2M x 36

9MB

(4) 256K x 9

(1) 1M x 36

(1) 1M x 36

9MB

(4) 1M x 9

(1) 1M x 36

(1) 256K x 36

DRAM CONFIGURATION (CONT)

Size

Bank 0

Bank 1

Bank 2

9MB

(4) 1M x 9

(1) 256K x 36

(1) 1M x 36

10MB

(4) 1M x 9

(1) 1M x 36

(1) 512K x 36

12MB

(4) 1M x 9

(1) 1M x 36

(1) 1M x 36

12MB

None

(1) 1M x 36

(1) 2M x 36

12MB

None

(1) 2M x 36

(1) 1M x 36

16MB

(4) 4M x 9

None

None

16MB

None

(1) 4M x 36

None

16MB

None

None

(1) 4M x 36

17MB

(4) 256K x 9

None

(1) 4M x 36

17MB

(4) 4M x 9

(1) 256K x 36

None

20MB

(4) 1M x 9

(1) 4M x 36

None

20MB

(4) 1M x 9

None

(1) 4M x 36

24MB

(4) 1M x 9

(1) 1M x 36

(1) 4M x 36

24MB

(4) 1M x 9

(1) 4M x 36

(1) 1M x 36

32MB

(4) 4M x 9

(1) 4M x 36

None

32MB

(4) 4M x 9

None

(1) 4M x 36

32MB

None

(1) 4M x 36

(1) 4M x 36

32MB

None

None

(1) 8M x 36

33MB

(4) 256K x 9

(1) 8M x 36

None

34MB

(4) 4M x 9

(1) 4M x 36

(1) 512K x 36

36MB

(4) 4M x 9

(1) 1M x 36

(1) 4M x 36

36MB

(4) 1M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

(1) 4M x 36

(1) 4M x 36

48MB

(4) 4M x 9

None

(1) 8M x 36

48MB

None

(1) 8M x 36

(1) 4M x 36

64MB

None

(1) 8M x 36

(1) 8M x 36

64MB

None

(1) 16M x 36

None

65MB

None

(1) 256K x 36

(1) 16M x 36

66MB

None

(1) 512K x 36

(1) 16M x 36

68MB

None

(1) 1M x 36

(1) 16M x 36

72MB

None

(1) 2M x 36

(1) 16M x 36

80MB

None

(1) 4M x 36

(1) 16M x 36

96MB

None

(1) 8M x 36

(1) 16M x 36

128MB

None

(1) 16M x 36

(1) 16M x 36

Note: Any combination of memory is valid. This table only shows a sample of possible configurations.

CACHE CONFIGURATION

Size

SL1

128KB

128KB module installed

256KB

256KB module installed

512KB

512KB module installed

1MB

1MB module installed

CPU SPEED SELECTION

Speed

JP3A

JP3B

JP3C

25MHz

Open

Open

Closed

33MHz

Closed

Closed

Closed

40MHz

Open

Closed

Closed

50iMHz

Open

Open

Closed

50MHz

Closed

Open

Open

66iMHz

Closed

Closed

Closed

75iMHz

Open

Open

Closed

80iMHz

Open

Closed

Closed

100iMHz

Closed

Closed

Closed

120iMHz

Open

Closed

Closed

133iMHz

Closed

Closed

Closed

CPU TYPE SELECTION

Type

JP6

JP7

JP8A

JP8B

JP9A

CX486DX

Open

Open

Open

1 & 2

1 & 2

IBM486DX

Open

Open

Open

1 & 2

1 & 2

TI486DX

Open

Open

Open

1 & 2

1 & 2

SGS486DX

Open

Open

Open

1 & 2

1 & 2

80486DX

Open

Closed

2 & 3

Open

2 & 3

AM486DX2

Open

Closed

2 & 3

Open

2 & 3

(SL) AM486DX2

Closed

Open

1 & 2

Open

1 & 2

CX486DX2

Open

Open

Open

1 & 2

1 & 2

IBM486DX2

Open

Open

Open

1 & 2

1 & 2

TI486DX2

Open

Open

Open

1 & 2

1 & 2

SGS486DX2

Open

Open

Open

1 & 2

1 & 2

80486DX2

Open

Closed

2 & 3

Open

2 & 3

CX486DX4 (A)

Open

Open

1 & 2

Open

1 & 2

CX486DX4

Open

Open

Open

1 & 2

1 & 2

IBM486DX4 (A)

Open

Open

1 & 2

Open

1 & 2

IBM486DX4

Open

Open

Open

1 & 2

1 & 2

TI486DX4

Open

Open

Open

1 & 2

1 & 2

SGS486DX4 (A)

Open

Open

1 & 2

Open

1 & 2

SGS486DX4

Open

Open

Open

1 & 2

1 & 2

AM486DX4

Open

Closed

2 & 3

Open

2 & 3

(SL) AM486DX4

Closed

Open

1 & 2

Open

1 & 2

SL80486DX4

Open

Open

2 & 3

Open

1 & 2

P24D

Open

Open

1 & 2

Open

1 & 2

CX5X86

Closed

Open

1 & 2

Open

1 & 2

AM X5

Closed

Open

1 & 2

Open

1 & 2

Note: Pins designated should be in the closed position. (A) = Intel pin out.

CPU TYPE SELECTION (CONT)

Type

JP9B

JP9C

JP10A

JP10B

JP10C

CX486DX

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

IBM486DX

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

TI486DX

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

SGS486DX

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

80486DX

Open

Open

3 & 4

Open

1 & 2, 3 & 4

AM486DX2

Open

Open

3 & 4

Open

1 & 2, 3 & 4

(SL) AM486DX2

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

CX486DX2

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

IBM486DX2

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

TI486DX2

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

SGS486DX2

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

80486DX2

Open

Open

3 & 4

Open

1 & 2, 3 & 4

CX486DX4 (A)

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

CX486DX4

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

IBM486DX4 (A)

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

IBM486DX4

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

TI486DX4

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

SGS486DX4 (A)

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

SGS486DX4

1 & 2

2 & 3

3 & 4

2 & 3

1 & 2, 3 & 4

AM486DX4

Open

Open

3 & 4

Open

1 & 2, 3 & 4

(SL) AM486DX4

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

SL80486DX4

1 & 2

Open

3 & 4

1 & 2

1 & 2, 3 & 4

P24D

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

CX5X86

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

AM X5

1 & 2, 3 & 4

3 & 4

3 & 4

1 & 2, 3 & 4

1 & 2, 3 & 4

Note: Pins designated should be in the closed position. (A) = Intel pin out.

CPU TYPE SELECTION (CONT)

Type

JP11

JP12A

JP12B

JP13

JP14

CX486DX

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

IBM486DX

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

TI486DX

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

SGS486DX

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

80486DX

Open

1 & 2

1 & 2

Open

Open

AM486DX2

Open

1 & 2

2 & 3

Open

Open

(SL) AM486DX2

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

CX486DX2

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

IBM486DX2

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

TI486DX2

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

SGS486DX2

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

80486DX2

Open

1 & 2

1 & 2

Open

Open

CX486DX4 (A)

Open

2 & 3

1 & 2

Closed

2 & 3, 4 & 5

CX486DX4

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

IBM486DX4 (A)

Open

2 & 3

1 & 2

Closed

2 & 3, 4 & 5

IBM486DX4

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

TI486DX4

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

SGS486DX4 (A)

Open

2 & 3

1 & 2

Closed

2 & 3, 4 & 5

SGS486DX4

2 & 3

2 & 3

1 & 2

Open

1 & 2, 3 & 4

AM486DX4

Open

1 & 2

2 & 3

Open

Open

(SL) AM486DX4

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

SL80486DX4

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

P24D

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

CX5X86

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

AM X5

Open

1 & 2

1 & 2

Open

2 & 3, 4 & 5

Note: Pins designated should be in the closed position. (A) = Intel pin out.

CPU VOLTAGE SELECTION

Voltage

JP4

JP5A

JP5B

JP5C

JP5D

3.3v

Closed

1 & 2

1 & 2

1 & 2

1 & 2

4v

Open

1 & 2

1 & 2

1 & 2

1 & 2

5v

Closed

2 & 3

2 & 3

2 & 3

2 & 3

Note: Pins designated should be in the closed position.