DIAMOND MULTIMEDIA SYSTEMS, INC.
================================

   FASTBUS VLB

   Processor    80386DX/80486SX/80487SX/80486DX/80486DX2          
   Processor    25/33/40/50 (internal)/50/66(internal) MHz        
   Speed        
   Chip Set     C & T                                             
   Max. onboard 128MB                                             
   DRAM         
   Cache        64/256KB                                          
   BIOS         C & T                                             
   Dimensions   330mm x 218mm                                     
   I/O Options  32-bit VESA local bus slots (2), floppy drive     
                interface, IDE interface, parallel port, serial   
                ports (2)                                         
   NPU Options  4167                                              

<gopher://bitreich.org/I/th99/m/C-D/31591-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | External battery |   BAT1   | Reset switch      |   CN7    |
   |------------------+----------+-------------------+----------|
   | Parallel port    |   CN1    | Speaker           |   CN8    |
   |------------------+----------+-------------------+----------|
   | Serial port      |   CN2    | Turbo switch      |   CN9    |
   | (COM1)           |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Serial port      |   CN3    | IDE interface LED |   CN10   |
   | (COM2)           |          |                   |          |
   |------------------+----------+-------------------+----------|
   | IDE interface    |   CN4    | Power LED &       |   CN11   |
   |                  |          | keylock           |          |
   |------------------+----------+-------------------+----------|
   | Floppy drive     |   CN5    | 32-bit VESA local |    S1    |
   | interface        |          | bus slot          |          |
   |------------------+----------+-------------------+----------|
   | Turbo LED        |   CN6    | 32-bit VESA local |    S2    |
   |                  |          | bus slot          |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |           Function            | Jumper/Switch |  Position  |
   |-------------------------------+---------------+------------|
   |>> | Onboard I/O controller    |      J23      |   Closed   |
   |   | enabled                   |               |            |
   |---+---------------------------+---------------+------------|
   |   | Onboard I/O controller    |      J23      |    Open    |
   |   | disabled                  |               |            |
   |---+---------------------------+---------------+------------|
   |>> | CMOS memory normal        |     JCOM      | pins 2 & 3 |
   |   | operation                 |               |   closed   |
   |---+---------------------------+---------------+------------|
   |   | CMOS memory clear         |     JCOM      | pins 1 & 2 |
   |   |                           |               |   closed   |
   |---+---------------------------+---------------+------------|
   |>> | Factory configured - do   |     SW1/7     |    Off     |
   |   | not alter                 |               |            |
   |---+---------------------------+---------------+------------|
   |>> | Factory configured - do   |     SW1/8     |    Off     |
   |   | not alter                 |               |            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   | 16MB  | (1) 4M x 36 |    NONE    |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (1) 4M x 36 |  (1) 4M x  |    NONE    |    NONE    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (1) 8M x 36 |    NONE    |    NONE    |    NONE    |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (1) 4M x 36 |  (1) 4M x  |  (1) 4M x  |  (1) 4M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (1) 8M x 36 |  (1) 8M x  |    NONE    |    NONE    |
   |       |             |     36     |            |            |
   |-------+-------------+------------+------------+------------|
   | 128MB | (1) 8M x 36 |  (1) 8M x  |  (1) 8M x  |  (1) 8M x  |
   |       |             |     36     |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |    Size    |      S3       |     JTAG1     |     JTAG2     |
   |------------+---------------+---------------+---------------|
   |    64KB    |  64KB module  |   Installed   | Not installed |
   |------------+---------------+---------------+---------------|
   |   128KB    | 256KB module  | Not installed |   Installed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |        VESA CPU TYPE (ID0 &AMP; ID1) CONFIGURATION         |
   |------------------------------------------------------------|
   |     CPU Type     | SW1/switch 1 (ID0) |    SW1/2 (ID1)     |
   |------------------+--------------------+--------------------|
   |      80386       |         On         |        Off         |
   |------------------+--------------------+--------------------|
   |      80486       |        Off         |         On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |            VESA WAIT STATE (ID2) CONFIGURATION             |
   |------------------------------------------------------------|
   |    Wait states     |     CPU speed     |    SW1/3(ID2)     |
   |--------------------+-------------------+-------------------|
   |   0 wait states    |      <=33MHz      |        Off        |
   |--------------------+-------------------+-------------------|
   |    1 wait state    |      >33MHz       |        On         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             VESA BUS SPEED (ID3) CONFIGURATION             |
   |------------------------------------------------------------|
   |          CPU speed          |         SW1/4 (ID3)          |
   |-----------------------------+------------------------------|
   |           <=33MHz           |             Off              |
   |-----------------------------+------------------------------|
   |           >33MHz            |              On              |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   VESA ID4 CONFIGURATION                   |
   |------------------------------------------------------------|
   |            Setting            |        SW1/5 (ID4)         |
   |-------------------------------+----------------------------|
   |    Reserved for future use    |             On             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU TYPE CONFIGURATION                   |
   |------------------------------------------------------------|
   |   TYPE   | JCALA  |  JNMI  | JFERR  | JIGN  | JCLK | JCLK2 |
   |----------+--------+--------+--------+-------+------+-------|
   |  AMD386  | pins 1 |  Open  | pins 2 | pins  | pins | pins  |
   |          |  & 2   |        |  & 3   | 2 & 3 | 2 &  | 2 & 3 |
   |          |        |        |        |       |  3   |       |
   |----------+--------+--------+--------+-------+------+-------|
   | 80486SX  | pins 2 |  Open  | pins 2 | pins  | pins | pins  |
   |          |  & 3   |        |  & 3   | 2 & 3 | 1 &  | 1 & 2 |
   |          |        |        |        |       |  2   |       |
   |----------+--------+--------+--------+-------+------+-------|
   | 80487SX  | pins 2 | Closed | pins 1 | pins  | pins | pins  |
   |          |  & 3   |        |  & 2   | 1 & 2 | 1 &  | 1 & 2 |
   |          |        |        |        |       |  2   |       |
   |----------+--------+--------+--------+-------+------+-------|
   | 80486DX  | pins 2 | Closed | pins 2 | pins  | pins | pins  |
   |          |  & 3   |        |  & 3   | 1 & 2 | 1 &  | 1 & 2 |
   |          |        |        |        |       |  2   |       |
   |----------+--------+--------+--------+-------+------+-------|
   | 80486DX2 | pins 2 | Closed | pins 2 | pins  | pins | pins  |
   |          |  & 3   |        |  & 3   | 1 & 2 | 1 &  | 1 & 2 |
   |          |        |        |        |       |  2   |       |
   |------------------------------------------------------------|
   | Note:AMD386 is a CPU module available from the             |
   | manufacturer                                               |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                  CPU SPEED CONFIGURATION                   |
   |------------------------------------------------------------|
   |        TYPE        |       Speed        |      SW2/6       |
   |--------------------+--------------------+------------------|
   |       AMD386       |       40MHz        |        On        |
   |--------------------+--------------------+------------------|
   |      80486SX       |       25MHz        |        On        |
   |--------------------+--------------------+------------------|
   |      80486SX       |       33MHz        |       Off        |
   |--------------------+--------------------+------------------|
   |      80487SX       |       25MHz        |        On        |
   |--------------------+--------------------+------------------|
   |      80487SX       |       33MHz        |       Off        |
   |--------------------+--------------------+------------------|
   |      80486DX       |       25MHz        |        On        |
   |--------------------+--------------------+------------------|
   |      80486DX       |       33MHz        |       Off        |
   |--------------------+--------------------+------------------|
   |      80486DX       |       50MHz        |       Off        |
   |--------------------+--------------------+------------------|
   |      80486DX2      |      50i MHz       |        On        |
   |--------------------+--------------------+------------------|
   |      80486DX2      |      66i MHz       |       Off        |
   +------------------------------------------------------------+