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# 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
(IMG) IMG 1
+------------------------------------------------------------+
| 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 & | J13/pins 2, |
| | | keylock | 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 | J10 | IDE interface | J14/pins 7 & |
| connector | | LED | 8 |
|-----------------+----------+----------------+--------------|
| Floppy drive | J11 | Riser card | S1 |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------------+--------+-----------------|
| » | PS/2 mouse port enabled | E9 | Open |
|---+-----------------------------+--------+-----------------|
| | PS/2 mouse port disabled | E9 | Closed |
|---+-----------------------------+--------+-----------------|
| » | CMOS memory normal | E13 | Open |
| | operation | | |
|---+-----------------------------+--------+-----------------|
| | 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,|E2/pins 2,|E2/Pins 7|
| | | | 3, & 5 | 4, & 6 | & 8 |
|----------+---------+-------+----------+----------+---------|
|»| COM1 | IRQ4 | 3F8h |pins 3 & 5|pins 2 & 4| Closed |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| | COM3 | IRQ4 | 3E8h |pins 1 & 3|pins 4 & 6| Closed |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| | COM4 | IRQ3 | 2E8h |pins 3 & 5|pins 4 & 6| Open |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| |Disabled| N/A | N/A |pins 1 & 3|pins 2 & 4| Open |
| | | | | closed | closed | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT B (C3) CONFIGURATION |
|------------------------------------------------------------|
| COM |Interrupt|Address|E1/pins 1,|E1/pins 2,|E1/Pins 7|
| | | | 3, & 5 | 4, & 6 | & 8 |
|----------+---------+-------+----------+----------+---------|
|»| COM2 | IRQ3 | 2F8h |pins 3 & 5|pins 2 & 4| Closed |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| | COM3 | IRQ4 | 3E8h |pins 1 & 3|pins 4 & 6| Closed |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| | COM4 | IRQ3 | 2E8h |pins 3 & 5|pins 4 & 6| Open |
| | | | | closed | closed | |
|-+--------+---------+-------+----------+----------+---------|
| |Disabled| N/A | N/A |pins 1 & 3|pins 2 & 4| Open |
| | | | | closed | closed | |
+------------------------------------------------------------+
+----------------------------------------------------------------+
| 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 & |pins 2 & |Closed| Open ||
| | | | | 5 | 4 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| | LPT1 | IRQ5 | 378h |pins 3 & |pins 2 & | Open |Closed ||
| | | | | 5 | 4 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| | LPT2 | IRQ7 | 278h |pins 1 & |pins 2 & |Closed| Open ||
| | | | | 3 | 4 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| | LPT2 | IRQ5 | 278h |pins 1 & |pins 4 & | Open |Closed ||
| | | | | 3 | 6 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| | LPT3 | IRQ7 | 278h |pins 1 & |pins 4 & |Closed| Open ||
| | | | | 3 | 6 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| | LPT3 | IRQ5 | 278h |pins 1 & |pins 4 & | Open |Closed ||
| | | | | 3 | 6 | | ||
|-+--------+---------+-------+---------+---------+------+-------||
| |Disabled| N/A | N/A |pins 1 & |pins 2 & | Open | Open ||
| | | | | 3 | 4 | | ||
|-+--------------------------------------------------------------|
| |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 & | E6/pins 11 |
| | | 10 | & 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 & | E6/pins 7 & |
| | | 6 | 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 | E5 | pins 2 & 4, 7 & |
| | enabled | | 9, 8 & 10 |
|---+-----------------------------+--------+-----------------|
| | Flash BIOS program mode | E5 | pins 4 & 5, 9 & |
| | disabled | | 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 & | N/A |
| | 11, 10 & 12 | |
|------------------+--------------------+--------------------|
| 80486SX PQFP | pins 1 & 2, 5 & 6, | pins 1 & 2 closed |
| | 7 & 9, 8 & 10 | |
|------------------+--------------------+--------------------|
| 80486SX PGA | pins 1 & 2, 5 & 6, | pins 2 & 3 closed |
| | 7 & 9, 8 & 10 | |
|------------------+--------------------+--------------------|
| 80487SX PGA | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 7 & 8 closed |
|------------------+--------------------+--------------------|
| ODP486SX PGA | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 7 & 8 closed |
|------------------+--------------------+--------------------|
| 80486DX PQFP | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 5 & 6 closed |
|------------------+--------------------+--------------------|
| 80486DX PGA | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 5 & 6 closed |
|------------------+--------------------+--------------------|
| 80486DX2 PGA | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 5 & 6 closed |
|------------------+--------------------+--------------------|
| ODP586SX PGA | pins 1 & 2, 5 & 6, | pins 1 & 2, 3 & 4, |
| | 7 & 9, 8 & 10 | 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 & | pins 3 & 5, 4 & |
| | | 6 | 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 & | pins 1 & 3, 2 & |
| | | 6 | 4 |
|------------------------------------------------------------|
| Note:Pins designated should be in the closed position. |
+------------------------------------------------------------+