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# TULIP COMPUTERS
DC/DT 486SX (TC35)
Processor 80486SX/80487SX/80486DX/ODP486SX
Processor 20/40(internal)MHz
Speed
Chip Set Texas Instruments
Max. Onboard 20MB
DRAM
Cache 256K
BIOS Phoenix
Dimensions 330mm x 218mm
I/O Options Floppy drive interface, IDE interface, parallel
port, serial ports(2), VGA feature connector, VGA
port
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|---------------+----------+----------------------+----------|
| VGA port | CN1 | LED, Speaker, | J2 |
| | | Batteries | |
|---------------+----------+----------------------+----------|
| Serial port 2 | CN2 | IDE interface | J3 |
|---------------+----------+----------------------+----------|
| Parallel port | CN3 | VESA feature | J9 |
| | | connector | |
|---------------+----------+----------------------+----------|
| Serial port 1 | CN4 | Floppy drive | J10 |
| | | interface | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | Parallel port unidirectional | J20 | Pins 1 & 2 |
| | (printer) | | closed |
|---+----------------------------------+--------+------------|
| | Paralled port bidirectional | J20 | Pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Battery - Rechargeable | J21 | Pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | Battery - Non-rechargeable | J21 | N/A |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | J22 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU UPGRADE TYPE CONFIGURATION |
|------------------------------------------------------------|
| UPGRADE | J14 | J18 |
|------------------+--------------------+--------------------|
| 80487SX | N/A | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80486DX | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| 80486DX2 | Pins 1 & 2 closed | Pins 2 & 3 closed |
|------------------+--------------------+--------------------|
| ODP486SX | N/A | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG | J11 |
|-------+-------------+-------------+------------------------|
| 64KB | (9) 8K x 8 | (1) 64K x 1 | N/A |
|-------+-------------+-------------+------------------------|
| 256KB | (9) 32K x 8 | (1) 64K x 1 | Pins 1 &2, 3 & 4 |
| | | | closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Expansion from: | Expansion to: | Bank 0 |
|--------------------+--------------------+------------------|
| 4MB | 8MB | (4) 1MB x 9 |
|--------------------+--------------------+------------------|
| 4MB | 20MB | (4) 4MB x 9 |
|------------------------------------------------------------|
| Note: 4MB is internal memory and is not configurable. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| VRAM | J23 |
|----------------------------+-------------------------------|
| 512KB | Pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 1024KB | Pins 2 & 3 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| VRAM CONFIGURATION |
|------------------------------------------------------------|
| Expansion from: | Expansion to: | VRAM |
|--------------------+--------------------+------------------|
| 512KB | 1MB | (4) 256K x 4 |
|------------------------------------------------------------|
| Note: 512KB is internal memory and is not configurable. |
+------------------------------------------------------------+