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DT-LB2AL

DD & TT ENTERPRISE USA COMPANY

DT-LB2AL

Processor

80386DX/CX486DLC/80486SX/80487SX/80486DX

ODP486SX/80486DX2/ODP586SX

Processor Speed

20/25/33/40/50(internal)/50/66(internal) MHz

Chip Set

Symphony

Max. onboard DRAM

32MB

Cache

64/256KB

BIOS

AMI

Dimensions

330mm x 220mm

I/O Options

Floppy drive interface, game port, IDE interface, parallel port,

PS/2 mouse port, serial ports (2), VGA feature connector,

VGA port

NPU Options

80387DX/CX487DLC

CONNECTIONS

Purpose

Location

Purpose

Location

VGA port

C1

IDE interface

J12

Parallel port

C2

Speaker

J13/pins 1, 3, 5, 7

Serial port B

C3

Power LED & keylock

J13/pins 2, 4, 6, 8, 10

Serial port A

C4

Reset switch

J14/pins 1 & 2

PS/2 mouse port

C5

Turbo switch

J14/pins 3 & 4

Game port

J9

Turbo LED

J14/pins 5 & 6

VGA feature connector

J10

IDE interface LED

J14/pins 7 & 8

Floppy drive interface

J11

Riser card

S1

USER CONFIGURABLE SETTINGS

Function

Jumper

Position

PS/2 mouse port enabled

E9

Open

 

PS/2 mouse port disabled

E9

Closed

CMOS memory normal operation

E13

Open

 

CMOS memory clear

E13

Closed

Onboard speaker enabled

J13

pins 1 & 3 closed

 

Onboard speaker disabled

J13

pins 1 & 3 open

SERIAL PORT A (C4) CONFIGURATION

COM

Interrupt

Address

E2/pins 1, 3, & 5

E2/pins 2, 4, & 6

E2/Pins 7 & 8

COM1

IRQ4

3F8h

pins 3 & 5 closed

pins 2 & 4 closed

Closed

 

COM3

IRQ4

3E8h

pins 1 & 3 closed

pins 4 & 6 closed

Closed

 

COM4

IRQ3

2E8h

pins 3 & 5 closed

pins 4 & 6 closed

Open

 

Disabled

N/A

N/A

pins 1 & 3 closed

pins 2 & 4 closed

Open

SERIAL PORT B (C3) CONFIGURATION

COM

Interrupt

Address

E1/pins 1, 3, & 5

E1/pins 2, 4, & 6

E1/Pins 7 & 8

COM2

IRQ3

2F8h

pins 3 & 5 closed

pins 2 & 4 closed

Closed

 

COM3

IRQ4

3E8h

pins 1 & 3 closed

pins 4 & 6 closed

Closed

 

COM4

IRQ3

2E8h

pins 3 & 5 closed

pins 4 & 6 closed

Open

 

Disabled

N/A

N/A

pins 1 & 3 closed

pins 2 & 4 closed

Open

PARALLEL PORT (C2) CONFIGURATION

LPT

Interrupt

Address

E4/1,3,&5

E4/2,4,&6

E4/7&8

E4/9&10

LPT1

IRQ7

378h

pins 3 & 5

pins 2 & 4

Closed

Open

 

LPT1

IRQ5

378h

pins 3 & 5

pins 2 & 4

Open

Closed

 

LPT2

IRQ7

278h

pins 1 & 3

pins 2 & 4

Closed

Open

 

LPT2

IRQ5

278h

pins 1 & 3

pins 4 & 6

Open

Closed

 

LPT3

IRQ7

278h

pins 1 & 3

pins 4 & 6

Closed

Open

 

LPT3

IRQ5

278h

pins 1 & 3

pins 4 & 6

Open

Closed

 

Disabled

N/A

N/A

pins 1 & 3

pins 2 & 4

Open

Open

 

Notes:Pins designated should be in the closed position.

In order for LPT3 to be selected, a Hercules monographics card with an active parallel port must be present.

FLOPPY DRIVE INTERFACE CONFIGURATION

I/O Address

E3/pins 1, 3, 5, 7, 9, 11

3F0-3F7

pins 3 & 5, 7 & 9 closed

 

370-377

pins 3 & 5, 9 & 11 closed

 

Disabled

pins 1 & 3 closed

IDE INTERFACE CONFIGURATION

I/O Address

E3/pins 2, 4, 6, 8, 10, 12

3F0-3F7, 1F0-1F7

pins 4 & 6, 8 & 10 closed

 

370-377, 170-177

pins 4 & 6, 10 & 12 closed

 

Disabled

pins 2 & 4 closed

ONBOARD VGA PORT CONFIGURATION

Function

Jumper

Position

Onboard VGA enabled

E6

pins 1 & 2, 3 & 4 closed

 

Onboard VGA disabled

E6

pins 1 & 2, 3 & 4 open

Onboard VGA memory 512KB

E6

pins 13 & 14 closed

 

Onboard VGA memory 1MB

E6

pins 13 & 14 open

ONBOARD VGA VIDEO MODE CONFIGURATION (800X600 RESOLUTION)

Refresh Rate

Mode

E6/pins 9 & 10

E6/pins 11 & 12

56Hz

Non-Interlaced

Open

Open

56Hz

Non-Interlaced

Closed

Closed

60Hz

Non-Interlaced

Closed

Open

72Hz

Non-Interlaced

Open

Closed

ONBOARD VGA VIDEO MODE CONFIGURATION (1024 X 768 RESOLUTION)

Refresh Rate

Mode

E6/pins 5 & 6

E6/pins 7 & 8

43.5Hz

Interlaced

Open

Open

43.5Hz

Interlaced

Closed

Closed

60Hz

Non-Interlaced

Closed

Open

70Hz

Non-Interlaced

Open

Closed

BIOS CONFIGURATION

Function

Jumper

Position

BIOS ROM 1MB

E5

pins 1 & 3 closed

 

BIOS ROM 2MB

E5

pins 3 & 5 closed

Flash BIOS program mode enabled

E5

pins 2 & 4, 7 & 9, 8 & 10

 

Flash BIOS program mode disabled

E5

pins 4 & 5, 9 & 11, 10 & 12

CACHE CONFIGURATION

Size

Max Cachable

Cache

TAG

64KB

8MB

(8) 8K x 8

(1) 32K x 8

256KB

32MB

(8) 32K x 8

(1) 32K x 8

CACHE JUMPER CONFIGURATION

Size

E11

64KB

pins 3 & 5, 4 & 6 closed

256KB

pins 1 & 3, 2 & 4, 7 & 8, 9 & 10, 11 & 12 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

5MB

(4) 1M x 9

(4) 256K x 9

8MB

(4) 1M x 9

(4) 1M x 9

16MB

(4) 4M x 9

NONE

17MB

(4) 256K x 9

(4) 4M x 9

20MB

(4) 1M x 9

(4) 4M x 9

32MB

(4) 4M x 9

(4) 4M x 9

CPU TYPE CONFIGURATION

CPU Type

E10

E14

80386DX PQFP/PGA

pins 3 & 4, 9 & 11, 10 & 12

N/A

80486SX PQFP

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2 closed

80486SX PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 2 & 3 closed

80487SX PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 7 & 8 closed

ODP486SX PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 7 & 8 closed

80486DX PQFP

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 5 & 6 closed

80486DX PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 5 & 6 closed

80486DX2 PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 5 & 6 closed

ODP586SX PGA

pins 1 & 2, 5 & 6, 7 & 9, 8 & 10

pins 1 & 2, 3 & 4, 5 & 6 closed

Note:Pins designated should be in the closed position.

CPU SPEED CONFIGURATION

CPU Speed

E7

E8

E12

20MHz

pins 1 & 2

pins 1 & 2

pins 3 & 5, 4 & 6

25MHz

pins 1 & 2

pins 3 & 4, 5 & 6

pins 3 & 5, 4 & 6

33MHz

pins 1 & 2

pins 3 & 4

pins 3 & 5, 4 & 6

40MHz

pins 1 & 2

pins 5 & 6

pins 3 & 5, 4 & 6

50MHz

pins 2 & 3

pins 3 & 4, 5 & 6

pins 1 & 3, 2 & 4

Note:Pins designated should be in the closed position.