SVEC COMPUTER CORPORATION
=========================

   FD0464B/FD0464C

   NIC Type:           ARCnet                                     
   Transfer Rate:      2.5Mbps                                    
   Data Bus:           16-bit ISA                                 
   Topology:           Linear bus (FD0464B only)                  
                                                                  
                       Star                                       
   Wiring Type         RG62A/U 93ohm coaxial                      
                                                                  
                       Unshielded twisted pair                    
   Boot ROM            Available                                  

<gopher://bitreich.org/I/th99/n/S-T/40907-1.png>
   

   +------------------------------------------------------------+
   |                   INTERRUPT SELECT - JP1                   |
   |------------------------------------------------------------|
   |   IRQ    | Jumper  | Jumper  | Jumper  | Jumper  | Jumper  |
   |          |    A    |    B    |    C    |    D    |    E    |
   |----------+---------+---------+---------+---------+---------|
   |>> | IRQ2 | Closed  |  Open   |  Open   |  Open   |  Open   |
   |---+------+---------+---------+---------+---------+---------|
   |   | IRQ3 |  Open   | Closed  |  Open   |  Open   |  Open   |
   |---+------+---------+---------+---------+---------+---------|
   |   | IRQ4 |  Open   |  Open   | Closed  |  Open   |  Open   |
   |---+------+---------+---------+---------+---------+---------|
   |   | IRQ5 |  Open   |  Open   |  Open   | Closed  |  Open   |
   |---+------+---------+---------+---------+---------+---------|
   |   | IRQ7 |  Open   |  Open   |  Open   |  Open   | Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          BOOT ROM                          |
   |------------------------------------------------------------|
   |             Setting             |           JP2            |
   |---------------------------------+--------------------------|
   |>> |          Disabled           |           Open           |
   |---+-----------------------------+--------------------------|
   |   |           Enabled           |          Closed          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        WIRING TYPE                         |
   |------------------------------------------------------------|
   |      Setting       |   JP3/jumper A    |   JP3/jumper B    |
   |--------------------+-------------------+-------------------|
   | Unshielded twisted | Pins 1 & 2 closed | Pins 1 & 2 closed |
   |        pair        |                   |                   |
   |--------------------+-------------------+-------------------|
   |   RG62A/U 93ohm    | Pins 2 & 3 closed | Pins 2 & 3 closed |
   |      coaxial       |                   |                   |
   |------------------------------------------------------------|
   | Note:This table applies only to the FD0464B.               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                          TOPOLOGY                          |
   |------------------------------------------------------------|
   |            Setting            |            JP4             |
   |-------------------------------+----------------------------|
   |             Star              |           Closed           |
   |-------------------------------+----------------------------|
   |          Linear bus           |            Open            |
   |------------------------------------------------------------|
   | Note:This table applies only to the FD0464B.               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       MEMORY ADDRESS                       |
   |------------------------------------------------------------|
   | RAM Address |ROM Address|SW1/1 |SW1/2 |SW1/3 |SW1/4 |SW1/5 |
   |-------------+-----------+------+------+------+------+------|
   |>>  | D0000h  |  D2000h   |  On  |  On  | Off  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C0000h  |  C2000h   |  On  |  On  |  On  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C0800h  |  C2000h   | Off  |  On  |  On  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C1000h  |  C2000h   |  On  | Off  |  On  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C1800h  |  C2000h   | Off  | Off  |  On  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C4000h  |  C6000h   |  On  |  On  | Off  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C4800h  |  C6000h   | Off  |  On  | Off  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C5000h  |  C6000h   |  On  | Off  | Off  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | C5800h  |  C6000h   | Off  | Off  | Off  |  On  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | CC000h  |  CE000h   |  On  |  On  |  On  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | CC800h  |  CE000h   | Off  |  On  |  On  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | CD000h  |  CE000h   |  On  | Off  |  On  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | CD800h  |  CE000h   | Off  | Off  |  On  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D0800h  |  D2000h   | Off  |  On  | Off  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D1000h  |  D2000h   |  On  | Off  | Off  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D1800h  |  D2000h   | Off  | Off  | Off  | Off  |  On  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4000h  |  D6000h   |  On  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4800h  |  D6000h   | Off  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5000h  |  D6000h   |  On  | Off  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5800h  |  D6000h   | Off  | Off  | Off  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4000h  |  D6000h   |  On  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4800h  |  D6000h   | Off  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5000h  |  D6000h   |  On  | Off  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5800h  |  D6000h   | Off  | Off  | Off  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4000h  |  D6000h   |  On  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D4800h  |  D6000h   | Off  |  On  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5000h  |  D6000h   |  On  | Off  |  On  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | D5800h  |  D6000h   | Off  | Off  | Off  |  On  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | E0000h  |  E2000h   |  On  |  On  | Off  | Off  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | E0800h  |  E2000h   | Off  |  On  | Off  | Off  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | E1000h  |  E2000h   |  On  | Off  | Off  | Off  | Off  |
   |---+---------+-----------+------+------+------+------+------|
   |   | E1800h  |  E2000h   | Off  | Off  | Off  | Off  | Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                        I/O ADDRESS                         |
   |------------------------------------------------------------|
   |     Address     |    SW1/6     |    SW1/7    |    SW1/8    |
   |-----------------+--------------+-------------+-------------|
   |>> |    2E0h     |      On      |     Off     |     On      |
   |---+-------------+--------------+-------------+-------------|
   |   |    260h     |      On      |     On      |     On      |
   |---+-------------+--------------+-------------+-------------|
   |   |    290h     |     Off      |     On      |     On      |
   |---+-------------+--------------+-------------+-------------|
   |   |    2E0h     |      On      |     Off     |     On      |
   |---+-------------+--------------+-------------+-------------|
   |   |    2F0h     |     Off      |     Off     |     On      |
   |---+-------------+--------------+-------------+-------------|
   |   |    300h     |      On      |     On      |     Off     |
   |---+-------------+--------------+-------------+-------------|
   |   |    350h     |     Off      |     On      |     Off     |
   |---+-------------+--------------+-------------+-------------|
   |   |    380h     |      On      |     Off     |     Off     |
   |---+-------------+--------------+-------------+-------------|
   |   |    3E0h     |     Off      |     Off     |     Off     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       NODE ID NUMBER                       |
   |------------------------------------------------------------|
   |ID #|SW2/1 |SW2/2 |SW2/3 |SW2/4 |SW2/5 |SW2/6 |SW2/7 |SW2/8 |
   |----+------+------+------+------+------+------+------+------|
   |255 | Off  | Off  | Off  | Off  | Off  | Off  | Off  | Off  |
   |----+------+------+------+------+------+------+------+------|
   | 35 | Off  | Off  |  On  |  On  |  On  | Off  |  On  |  On  |
   |----+------+------+------+------+------+------+------+------|
   | 1  | Off  |  On  |  On  |  On  |  On  |  On  |  On  |  On  |
   |------------------------------------------------------------|
   |Note:Nodes can be numbered from 1 to 255. The switches are a|
   |binary representation of the node numbers. When a switch is |
   |off, the corresponding bit is set to 1 and has the following|
   |decimal value: SW2/1=1, SW2/2=2, SW2/3=4, SW2/4=8, SW2/5=16,|
   |SW2/6=32, SW2/7=64, SW2/8=128.                              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                       DIAGNOSTIC LED                       |
   |------------------------------------------------------------|
   | Status |                     Condition                     |
   |--------+---------------------------------------------------|
   |   On   |   Network connected successfully/data is being    |
   |        |              transmitted or received              |
   |--------+---------------------------------------------------|
   |  Off   |   Power off/network not connected successfully    |
   |--------+---------------------------------------------------|
   |  Dim   |           Heavy data traffic on network           |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                         CONNECTORS                         |
   |------------------------------------------------------------|
   |            Purpose            |          Location          |
   |-------------------------------+----------------------------|
   |    External LED connector     |            JP5             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   |  The FD0464C is equipped with an RG62A/U 93ohm connector   |
   |                  for star topology only.                   |
   +------------------------------------------------------------+