DIGITAL EQUIPMENT CORPORATION
=============================

   DIGITAL 21164

   Processor        Alpha                                         
   Processor Speed  266/300/333MHz                                
   Chip Set         DEC                                           
   Video Chip Set   None                                          
   Maximum Onboard  512MB                                         
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            2048/4096/8192KB                              
   BIOS             Unidentified                                  
   Dimensions       332mm x 307mm                                 
   I/O Options      64-bit PCI slots (2), 32-bit PCI slots (2),   
                    floppy drive interface, IDE interface,        
                    parallel port, PS/2 mouse port, serial ports  
                    (2), cache slots (2)                          
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/C-D/34168-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        |   Location   | Purpose        | Location  |
   |----------------+--------------+----------------+-----------|
   | Chassis fan    | J2/pins 3 &  | Serial port 1  |    J27    |
   | power          |      5       |                |           |
   |----------------+--------------+----------------+-----------|
   | Chassis fan    | J2/pins 7 &  | IDE interface  |    J28    |
   | power          |      9       |                |           |
   |----------------+--------------+----------------+-----------|
   | Halt connector | J2/pins 8 &  | Floppy drive   |    J31    |
   |                |      10      | interface      |           |
   |----------------+--------------+----------------+-----------|
   | Chassis fan    | J2/pins 11 & | Parallel port  |    J33    |
   | power          |      13      |                |           |
   |----------------+--------------+----------------+-----------|
   | Reset switch   | J2/pins 12 & | PS/2 mouse     |    J34    |
   |                |      14      | port           |           |
   |----------------+--------------+----------------+-----------|
   | IDE interface  | J2/pins 15 & | 64-bit PCI     | PC1 & PC2 |
   | LED            |      17      | slots          |           |
   |----------------+--------------+----------------+-----------|
   | Keylock        | J2/pins 18 & | 32-bit PCI     | PC3 & PC4 |
   |                |      20      | slots          |           |
   |----------------+--------------+----------------+-----------|
   | Speaker        |   J2/pins    | Cache slot     |    SL1    |
   |                | 19,21,23,25  |                |           |
   |----------------+--------------+----------------+-----------|
   | Serial port 2  |     J26      | Cache slot     |    SL2    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |             Function              |   Label   |  Position  |
   |-----------------------------------+-----------+------------|
   |>> | Factory configured - do not   | J1/pins 9 |    N/A     |
   |   | alter                         |   & 10    |            |
   |---+-------------------------------+-----------+------------|
   |>> | SROM test disabled            |  J1/pins  |    Open    |
   |   |                               |  23 & 24  |            |
   |---+-------------------------------+-----------+------------|
   |   | SROM test enabled             |  J1/pins  |   Closed   |
   |   |                               |  23 & 24  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Loaded image select alternate |  J1/pins  |   Closed   |
   |   | images loaded                 |  25 & 26  |            |
   |---+-------------------------------+-----------+------------|
   |   | Loaded image select first     |  J1/pins  |    Open    |
   |   | image loaded                  |  25 & 26  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Cache speed select nominal    |  J1/pins  |    Open    |
   |   | read speed                    |  29 & 30  |            |
   |---+-------------------------------+-----------+------------|
   |   | Cache speed select read speed |  J1/pins  |   Closed   |
   |   | 1 cycle faster                |  29 & 30  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |  J1/pins  |    N/A     |
   |   | alter                         |  31 & 32  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |  J1/pins  |    N/A     |
   |   | alter                         |  33 & 34  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |  J1/pins  |    N/A     |
   |   | alter                         |  35 & 36  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |  J1/pins  |    N/A     |
   |   | alter                         |  37 & 38  |            |
   |---+-------------------------------+-----------+------------|
   |>> | Factory configured - do not   |  J1/pins  |    N/A     |
   |   | alter                         |  39 & 40  |            |
   |---+-------------------------------+-----------+------------|
   |>> | SROM test connector           |    J13    |    N/A     |
   |---+-------------------------------+-----------+------------|
   |>> | Flash BIOS write protect      |    J14    | Pins 2 & 3 |
   |   | disabled                      |           |   closed   |
   |---+-------------------------------+-----------+------------|
   |   | Flash BIOS write protect      |    J14    | Pins 1 & 2 |
   |   | enabled                       |           |   closed   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0    |   Bank 1   |   Bank 2   |   Bank 3   |
   |-------+-------------+------------+------------+------------|
   | 32MB  | (2) 1M x 36 |  (2) 1M x  |  (2) 1M x  |  (2) 1M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 64MB  | (2) 2M x 36 |  (2) 2M x  |  (2) 2M x  |  (2) 2M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 128MB | (2) 4M x 36 |  (2) 4M x  |  (2) 4M x  |  (2) 4M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 256MB | (2) 8M x 36 |  (2) 8M x  |  (2) 8M x  |  (2) 8M x  |
   |       |             |     36     |     36     |     36     |
   |-------+-------------+------------+------------+------------|
   | 512MB |  (2) 16M x  | (2) 16M x  | (2) 16M x  | (2) 16M x  |
   |       |     36      |     36     |     36     |     36     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   |        Size        |        SL1         |       SL2        |
   |--------------------+--------------------+------------------|
   |        2MB         |        2MB         |       None       |
   |--------------------+--------------------+------------------|
   |        4MB         |        4MB         |       None       |
   |--------------------+--------------------+------------------|
   |        8MB         |        4MB         |       4MB        |
   |------------------------------------------------------------|
   | Note: The sizes of the cache modules are unidentified.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size | J1/pins 11 & 12 | J1/pins 13 & 14 | J1/pins 15 & 16 |
   |------+-----------------+-----------------+-----------------|
   | 2MB  |     Closed      |      Open       |      Open       |
   |------+-----------------+-----------------+-----------------|
   | 4MB  |      Open       |     Closed      |     Closed      |
   |------+-----------------+-----------------+-----------------|
   | 8MB  |      Open       |     Closed      |      Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                CACHE ADDRESS CONFIGURATION                 |
   |------------------------------------------------------------|
   | Size |       J15       |       J16       |       J17       |
   |------+-----------------+-----------------+-----------------|
   | 2MB  |   Pins 1 & 2    |   Pins 2 & 3    |   Pins 2 & 3    |
   |      |     closed      |     closed      |     closed      |
   |------+-----------------+-----------------+-----------------|
   | 4MB  |   Pins 1 & 2    |   Pins 1 & 2    |   Pins 2 & 3    |
   |      |     closed      |     closed      |     closed      |
   |------+-----------------+-----------------+-----------------|
   | 8MB  |   Pins 1 & 2    |   Pins 1 & 2    |   Pins 1 & 2    |
   |      |     closed      |     closed      |     closed      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE SPEED CONFIGURATION                  |
   |------------------------------------------------------------|
   |  Speed   |  J1/pins 17 &  |  J1/pins 19 &  | J1/pins 21 &  |
   |          |       18       |       20       |      22       |
   |----------+----------------+----------------+---------------|
   |   | 6ns  |     Closed     |     Closed     |     Open      |
   |---+------+----------------+----------------+---------------|
   |   | 8ns  |     Closed     |      Open      |    Closed     |
   |---+------+----------------+----------------+---------------|
   |>> | 10ns |     Closed     |      Open      |     Open      |
   |---+------+----------------+----------------+---------------|
   |   | 12ns |      Open      |     Closed     |    Closed     |
   |---+------+----------------+----------------+---------------|
   |   | 15ns |      Open      |     Closed     |     Open      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   CPU DIVISOR SELECTION                    |
   |------------------------------------------------------------|
   |  Divisor   | J1/pins 1 | J1/pins 3 | J1/pins 5 | J1/pins 7 |
   |            |    & 2    |    & 4    |    & 6    |    & 8    |
   |------------+-----------+-----------+-----------+-----------|
   |     3      |  Closed   |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     4      |  Closed   |   Open    |  Closed   |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     5      |  Closed   |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     6      |  Closed   |   Open    |   Open    |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     7      |  Closed   |   Open    |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   | 8 (266MHz) |   Open    |  Closed   |  Closed   |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   | 9 (300MHz) |   Open    |  Closed   |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     10     |   Open    |  Closed   |   Open    |  Closed   |
   |  (333MHz)  |           |           |           |           |
   |------------+-----------+-----------+-----------+-----------|
   |     11     |   Open    |  Closed   |   Open    |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     12     |   Open    |   Open    |  Closed   |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     13     |   Open    |   Open    |  Closed   |   Open    |
   |------------+-----------+-----------+-----------+-----------|
   |     14     |   Open    |   Open    |   Open    |  Closed   |
   |------------+-----------+-----------+-----------+-----------|
   |     15     |   Open    |   Open    |   Open    |   Open    |
   +------------------------------------------------------------+