(TXT) View Source
# DD & TT ENTERPRISE USA COMPANY
DT ESCORT SYSTEM BOARD A
Processor 80386SX/80486SLC
Processor Speed 25/33/40MHz
Chip Set Symphony
Max. Onboard DRAM 16MB
Cache None
BIOS AMI
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface,
parallel port
Proprietary EISA riser card slot, PS/2 mouse
port
Serial port (2), VGA port, video feature
connector
NPU Options 80387SX/CX487SLC
(IMG) IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|------------------+----------+-------------------+----------|
| PS/2 mouse port | J2 | Reset switch | J12A |
|------------------+----------+-------------------+----------|
| Serial port (COM | J3 | Turbo switch | J12B |
| 1) | | | |
|------------------+----------+-------------------+----------|
| Serial port (COM | J4 | Turbo LED | J12C |
| 2) | | | |
|------------------+----------+-------------------+----------|
| Parallel port | J5 | IDE interface LED | J12D |
|------------------+----------+-------------------+----------|
| VGA port | J6 | Not used | J12E |
|------------------+----------+-------------------+----------|
| Floppy drive | J9 | Speaker | J13A |
| interface | | | |
|------------------+----------+-------------------+----------|
| Video feature | J10 | Power LED & | J13B |
| port | | keylock | |
|------------------+----------+-------------------+----------|
| IDE interface | J11 | Proprietary riser | S1 |
| | | card slot | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|---------------------------+-----------+--------------------|
| » | Floppy drive disabled | E1 | pins 1 & 3 closed |
|---+-----------------------+-----------+--------------------|
| | Floppy drive enabled | E1 | pins 3 & 5 closed |
|---+-----------------------+-----------+--------------------|
| | Floppy drive address | E1 | pins 7 & 9 closed |
| | select 3FO-3F7 | | |
|---+-----------------------+-----------+--------------------|
| | Floppy drive address | E1 | pins 9 & 11 closed |
| | select 370-377 | | |
|---+-----------------------+-----------+--------------------|
| » | IDE interface | E1 | pins 2 & 4 closed |
| | disabled | | |
|---+-----------------------+-----------+--------------------|
| | IDE interface enabled | E1 | pins 4 & 6 closed |
|---+-----------------------+-----------+--------------------|
| | IDE interface address | E1 | pins 8 & 10 closed |
| | 3FO-3F7, 1FO-1F7 | | |
|---+-----------------------+-----------+--------------------|
| | IDE interface address | E1 | pins 20 & 12 |
| | 370-377, 170-177 | | closed |
|---+-----------------------+-----------+--------------------|
| » | On board video | E2 | pins 1 & 2, 3 & 4, |
| | enabled | | 5 & 6 closed |
|---+-----------------------+-----------+--------------------|
| | On board video | E2 | pins 1 & 2, 3 & 4, |
| | disabled | | 5 & 6 open |
|---+-----------------------+-----------+--------------------|
| » | BIOS device select | E6 | pins 1 & 2 closed |
| | 1MB | | |
|---+-----------------------+-----------+--------------------|
| | BIOS device select | E6 | pins 3 & 5 closed |
| | 2MB | | |
|---+-----------------------+-----------+--------------------|
| | BIOS device select | E6 | pins 2 & 4, 7 & 9, |
| | read only | | 8 & 10 closed |
|---+-----------------------+-----------+--------------------|
| » | BIOS device select | E6 | pins 4 & 6, 9 & |
| | read/write | | 11, 10 & 12 |
|---+-----------------------+-----------+--------------------|
| » | Chipset mode select | E7 | pins 3 & 5 closed |
| | 2x for 40MHz or less | | |
|---+-----------------------+-----------+--------------------|
| | Chipset mode select | E7 | pins 1 & 3 closed |
| | 1x for true 50MHz | | |
| | only | | |
|---+-----------------------+-----------+--------------------|
| | Chipset mode RDY1 set | E7 | pins 4 & 6 closed |
| | for 1X mode | | |
|---+-----------------------+-----------+--------------------|
| | Chipset mode RDY2 set | E7 | pins 2 & 4 closed |
| | for 2X mode | | |
|---+-----------------------+-----------+--------------------|
| » | Chipset mode burst | E8 | pins 23 & 24 |
| | rate select 3-2-2-2 | | closed |
|---+-----------------------+-----------+--------------------|
| | Chipset mode burst | E8 | pins 23 & 24 open |
| | rate select 2-1-1-1 | | |
|---+-----------------------+-----------+--------------------|
| » | Chipset mode write | E8 | pins 25 & 26 |
| | select 0 wait state | | closed |
|---+-----------------------+-----------+--------------------|
| | Chipset mode write | E8 | pins 25 & 26 open |
| | select 1 wait state | | |
|---+-----------------------+-----------+--------------------|
| » | PS/2 mouse enable at | E10 | Closed |
| | IRQ12 | | |
|---+-----------------------+-----------+--------------------|
| | PS/2 mouse disable | E10 | Open |
|---+-----------------------+-----------+--------------------|
| » | CMOS memory normal | E11 | Open |
|---+-----------------------+-----------+--------------------|
| | CMOS memory clear | E11 | Closed |
|---+-----------------------+-----------+--------------------|
| » | CPU speed select | E12 | pins 2 & 3 closed |
| | iOSC/2 | | |
|---+-----------------------+-----------+--------------------|
| | CPU speed select | E12 | pins 1 & 2 closed |
| | iOSC/1 | | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E15 | pins 1 & 2 closed |
| | do not alter | | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/1, 3 | pins 3 & 5 closed |
| | do not alter | & 5 | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/2, 4, | pins 4 & 6 closed |
| | do not alter | & 6 | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/7, 9 | pins 9 & 11 closed |
| | do not alter | & 11 | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/7 & 8 | Closed |
| | do not alter | | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/8 & | N/A |
| | do not alter | 10 | |
|---+-----------------------+-----------+--------------------|
| » | Factory configured - | E16/11 & | Open |
| | do not alter | 12 | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS (CONTINUED) |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------+-------------+-------------|
| » | Factory configured - do | E16/13 & 14 | Closed |
| | not alter | | |
|------+-------------------------+-------------+-------------|
| » | Factory configured - do | E16/15 & 16 | Closed |
| | not alter | | |
|------+-------------------------+-------------+-------------|
| » | Factory configured - do | E16/17 & 18 | Closed |
| | not alter | | |
|------------------------------------------------------------|
| Note: If there is no monochrome Hercules card present then |
| the system will automatically assume that address 378h is |
| LPT1 and address 278h is LPT2. |
| |
| Pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (2) 256K x 9 | NONE |
|------------------+--------------------+--------------------|
| 1MB | (2) 256K x 9 | (2) 256K x 9 |
|------------------+--------------------+--------------------|
| 2MB | (2) 1M x 9 | NONE |
|------------------+--------------------+--------------------|
| 2.5MB | (2) 256K x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 4MB | (2) 1M x 9 | (2) 1M x 9 |
|------------------+--------------------+--------------------|
| 8MB | (2) 4M x 9 | NONE |
|------------------+--------------------+--------------------|
| 8.5MB | (2) 256K x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 4M x 9 | (2) 4M x 9 |
|------------------+--------------------+--------------------|
| 16MB | (2) 16M x 9 | (2) 16M x 9 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | E14/pins 1 & 2 | E14/pins 3 & 4 | E14/pins 5 & 6 |
|---------+----------------+----------------+----------------|
| 25MHz | Open | Closed | Closed |
|---------+----------------+----------------+----------------|
| 33MHz | Open | Closed | Open |
|---------+----------------+----------------+----------------|
| 40MHz | Open | Open | Closed |
|---------+----------------+----------------+----------------|
| 25MHz | Open | Closed | Closed |
|---------+----------------+----------------+----------------|
| 33MHz | Open | Closed | Open |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT A (J3) CONFIGURATION |
|------------------------------------------------------------|
| COM | I/O Address | E5 |
|------------------+--------------+--------------------------|
| » | COM1 | 3F8h | pins 3 & 5, 2 & 4, 7 & 8 |
|----+-------------+--------------+--------------------------|
| | COM3 | 3E8h | pins 1 & 3, 4 & 6, 7 & 8 |
|----+-------------+--------------+--------------------------|
| | COM4 | 2E8h | pins 3 & 5, 4 & 6, 7 & 8 |
|----+-------------+--------------+--------------------------|
| | Disabled | N/A | pins 1 & 3, 2 & 4 |
|------------------------------------------------------------|
| Note: pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| SERIAL PORT B (J4) CONFIGURATION |
|------------------------------------------------------------|
| COM | I/O Address | E4 |
|-----------------+---------------+--------------------------|
| » | COM2 | 2F8h | pins 3 & 5, 2 & 4, 7 & 8 |
|----+------------+---------------+--------------------------|
| | COM3 | 3E8h | pins 3 & 5, 4 & 6, 7 & 8 |
|----+------------+---------------+--------------------------|
| | COM4 | 2E8h | pins 1 & 3, 4 & 6, 7 & 8 |
|----+------------+---------------+--------------------------|
| | Disabled | N/A | pins 1 & 3, 2 & 4 |
|------------------------------------------------------------|
| Note:pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| PARALLEL PORT (J5) CONFIGURATION |
|------------------------------------------------------------|
| COM | IRQ | I/O Address | E3 |
|--------------+------+-------------+------------------------|
| » | LPT1 | IRQ7 | 3BCh | pins 3 & 5, 4 & 6, 7 & |
| | | | | 8 |
|---+----------+------+-------------+------------------------|
| | LPT1 | IRQ5 | 3BCh | pins 3 & 5, 4 & 6, 9 & |
| | | | | 10 |
|---+----------+------+-------------+------------------------|
| | LPT2 | IRQ7 | 378h | pins 3 & 5, 2 & 6, 7 & |
| | | | | 8 |
|---+----------+------+-------------+------------------------|
| | LPT2 | IRQ5 | 378h | pins 3 & 5, 2 & 6, 9 & |
| | | | | 10 |
|---+----------+------+-------------+------------------------|
| | LPT3 | IRQ7 | 278h | pins 1 & 3, 4 & 6, 7 & |
| | | | | 8 |
|---+----------+------+-------------+------------------------|
| | LPT3 | IRQ5 | 278h | pins 1 & 3, 4 & 6, 9 & |
| | | | | 10 |
|---+----------+------+-------------+------------------------|
| | Disabled | N/A | N/A | pins 1 & 3, 2 & 4 |
|------------------------------------------------------------|
| Note: pins designated should be in the closed position. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VIDEO MEMORY CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | Bank 1 |
|------------------+--------------------+--------------------|
| 512KB | (4) 44256 | NONE |
|------------------+--------------------+--------------------|
| 1024KB | (4) 44256 | (4) 44256 |
|------------------------------------------------------------|
| Note: Bank 0 is permanently soldered onto the board. |
+------------------------------------------------------------+