COMPUDYNE
=========

   UTD 4800AIO EISA VESA ZIF

   Processor        80486DX/80486DX2                              
   Processor Speed  25/33/40/50(internal)/50/66(internal)MHz      
   Chip Set         OPTI                                          
   Video Chip Set   None                                          
   Maximum Onboard  Unidentified                                  
   Memory           
   Maximum Video    None                                          
   Memory           
   Cache            64/128/256/512/1024KB                         
   BIOS             Unidentified                                  
   Dimensions       330mm x 218mm                                 
   I/O Options      32-bit VESA local bus slot, floppy drive      
                    interface, IDE interface, parallel port,      
                    serial ports (2)                              
   NPU Options      None                                          

<gopher://bitreich.org/I/th99/m/C-D/34318-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose        | Location | Purpose             | Location |
   |----------------+----------+---------------------+----------|
   | Serial port 1  |    P4    | Reset switch        |    P9    |
   |----------------+----------+---------------------+----------|
   | Serial port 2  |    P5    | IDE interface LED   |   P10    |
   |----------------+----------+---------------------+----------|
   | Parallel port  |    P6    | Speaker             |   P11    |
   |----------------+----------+---------------------+----------|
   | IDE interface  |    P7    | Power LED & keylock |   P12    |
   |----------------+----------+---------------------+----------|
   | Floppy drive   |    P8    | 32-bit VESA local   |   SL1    |
   | interface      |          | bus slot            |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |              Function               | Label |   Position   |
   |-------------------------------------+-------+--------------|
   |>> | IDE I/O channel RDY signal      |  J1   |     Open     |
   |   | select none                     |       |              |
   |---+---------------------------------+-------+--------------|
   |   | IDE I/O channel RDY signal      |  J1   |    Closed    |
   |   | select drive                    |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Flash BIOS programming disabled |  J2   |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | Flash BIOS programming enabled  |  J2   |    Closed    |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J3   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | Factory configured - do not     |  J4   | Unidentified |
   |   | alter                           |       |              |
   |---+---------------------------------+-------+--------------|
   |>> | ISA BUS ready timing ISA RDY    |  J26  |     Open     |
   |---+---------------------------------+-------+--------------|
   |   | ISA BUS ready timing EISA RDY   |  J26  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |>> | READY RTN generation select     |  J28  |  Pins 1 & 2  |
   |   | local bus                       |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |   | READY RTN generation select     |  J28  |  Pins 2 & 3  |
   |   | system                          |       |    closed    |
   |---+---------------------------------+-------+--------------|
   |>> | VL BUS not delayed              |  J29  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | VL BUS delayed                  |  J29  |     Open     |
   |---+---------------------------------+-------+--------------|
   |>> | Monitor type select color       |  J31  |    Closed    |
   |---+---------------------------------+-------+--------------|
   |   | Monitor type select monochrome  |  J31  |     Open     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   | Note: The maximum amount of memory is unidentified.        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CACHE CONFIGURATION                     |
   |------------------------------------------------------------|
   | Size  |   Bank 0   |  Bank 1   | TAG (U61)  |     TAG      |
   |-------+------------+-----------+------------+--------------|
   | 64KB  | (4) 8K x 8 | (4) 8K x  | (1) 64K x  | Unidentified |
   |       |            |     8     |     1      |              |
   |-------+------------+-----------+------------+--------------|
   | 128KB | (4) 32K x  |   None    | (1) 64K x  | Unidentified |
   |       |     8      |           |     1      |              |
   |-------+------------+-----------+------------+--------------|
   | 256KB | (4) 32K x  | (4) 32K x | (1) 64K x  | Unidentified |
   |       |     8      |     8     |     1      |              |
   |-------+------------+-----------+------------+--------------|
   | 512KB | (4) 64K x  | (4) 64K x | (1) 64K x  | Unidentified |
   |       |     8      |     8     |     1      |              |
   |-------+------------+-----------+------------+--------------|
   |  1MB  | (4) 128K x | (4) 128K  | (1) 64K x  | Unidentified |
   |       |     8      |    x 8    |     1      |              |
   |------------------------------------------------------------|
   | Note: The location of banks 0 & 1 is unidentified.         |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 CACHE JUMPER CONFIGURATION                 |
   |------------------------------------------------------------|
   |  Size   |   J19    |   J20   |   J21   |   J22   |   J23   |
   |---------+----------+---------+---------+---------+---------|
   |  64KB   |   Open   |  Open   |  Open   |  Open   |  Open   |
   |---------+----------+---------+---------+---------+---------|
   |  128KB  |   Open   | Closed  |  Open   |  Open   |  Open   |
   |---------+----------+---------+---------+---------+---------|
   |  256KB  |  Closed  | Closed  |  Open   |  Open   |  Open   |
   |---------+----------+---------+---------+---------+---------|
   |  512KB  |  Closed  | Closed  | Closed  |  Open   | Closed  |
   |---------+----------+---------+---------+---------+---------|
   |   1MB   |  Closed  | Closed  | Closed  | Closed  | Closed  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             CACHE JUMPER CONFIGURATION(CON'T)              |
   |------------------------------------------------------------|
   | Size  |  J24   |  J25   |       J27       |      J30       |
   |-------+--------+--------+-----------------+----------------|
   | 64KB  |  Open  |  Open  |   Pins 2 & 3    |   Pins 2 & 3   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   | 128KB |  Open  | Closed |   Pins 1 & 2    |   Pins 1 & 2   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   | 256KB | Closed | Closed |   Pins 2 & 3    |   Pins 2 & 3   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   | 512KB | Closed | Closed |   Pins 1 & 2    |   Pins 1 & 2   |
   |       |        |        |     closed      |     closed     |
   |-------+--------+--------+-----------------+----------------|
   |  1MB  | Closed | Closed |   Pins 2 & 3    |   Pins 2 & 3   |
   |       |        |        |     closed      |     closed     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                    CPU SPEED SELECTION                     |
   |------------------------------------------------------------|
   | Speed  |  J11  |  J12  |  J13  |  J15  | J16 | J17 |  J18  |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 25MHz  | 2 & 3 | Open  | Open  |Closed |Open |Open |Closed |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 33MHz  | 2 & 3 |Closed | Open  |Closed |Open |Open | Open  |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 40MHz  | 2 & 3 | Open  |Closed | Open  |Open |Open |Closed |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 50iMHz | 2 & 3 | Open  | Open  |Closed |Open |Open |Closed |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 50MHz  | 1 & 2 |Closed |Closed |Closed |Open |Open |Closed |
   |--------+-------+-------+-------+-------+-----+-----+-------|
   | 66iMHz | 2 & 3 |Closed | Open  |Closed |Open |Open | Open  |
   |------------------------------------------------------------|
   |Note: Pins designated should be in the closed position.     |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                   DMA CHANNEL SELECTION                    |
   |------------------------------------------------------------|
   |Channel |   J5   |   J6   |   J7   |   J8   |  J9   |  J10  |
   |--------+--------+--------+--------+--------+-------+-------|
   |   5    |  Open  |  Open  | Closed | Closed | Open  | Open  |
   |--------+--------+--------+--------+--------+-------+-------|
   |   6    |  Open  | Closed |  Open  |  Open  |Closed | Open  |
   |--------+--------+--------+--------+--------+-------+-------|
   |   7    | Closed |  Open  |  Open  |  Open  | Open  |Closed |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                VL BUS WAIT STATE SELECTION                 |
   |------------------------------------------------------------|
   |             Setting             |           J14            |
   |---------------------------------+--------------------------|
   |>>      |           0            |           Open           |
   |--------+------------------------+--------------------------|
   |        |           1            |          Closed          |
   +------------------------------------------------------------+