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                                              

<gopher://bitreich.org/I/th99/m/S-T/31924-1.png>
   

   +------------------------------------------------------------+
   |                        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.    |
   +------------------------------------------------------------+