(TXT) View Source
       
       # LEADING EDGE PRODUCTS, INC.
       
          MODEL D (REVISION CC1/CC2)
       
          Processor    8088 (exact location unknown)                     
          Processor    4.77/7.16MHz                                      
          Speed        
          Chip Set     Unknown                                           
          Max. Onboard 640KB                                             
          DRAM         
          Cache        None                                              
          BIOS         Unknown                                           
          Dimensions   254mm x 218mm                                     
          I/O Options  Floppy drive interface, parallel port, serial     
                       port, VGA port                                    
          NPU Options  8087                                              
       
 (IMG) IMG 1
          
       
          +------------------------------------------------------------+
          |                        CONNECTIONS                         |
          |------------------------------------------------------------|
          | Purpose              | Location | Purpose       | Location |
          |----------------------+----------+---------------+----------|
          | Parallel port        |    J5    | Keyboard      |   J16    |
          |----------------------+----------+---------------+----------|
          | Serial port          |    J6    | Speaker       |   J17    |
          |----------------------+----------+---------------+----------|
          | VGA port             |    J7    | Reset switch  |   J18    |
          |----------------------+----------+---------------+----------|
          | Light pen port       |   J10    | Power-on LED  |   J19    |
          |                      |          | indicator     |          |
          |----------------------+----------+---------------+----------|
          | Floppy drive         |   J13    |               |          |
          | interface            |          |               |          |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                 USER CONFIGURABLE SETTINGS                 |
          |------------------------------------------------------------|
          |           Function           | Jumper/Switch |  Position   |
          |------------------------------+---------------+-------------|
          | » | Factory configured - do  |      J8       |     N/A     |
          |   | not alter                |               |             |
          |---+--------------------------+---------------+-------------|
          | » | Monitor enabled          |      J9       |   Closed    |
          |---+--------------------------+---------------+-------------|
          |   | Monitor disabled         |      J9       |    Open     |
          |---+--------------------------+---------------+-------------|
          | » | Factory configured - do  |      J15      |    open     |
          |   | not alter                |               |             |
          |---+--------------------------+---------------+-------------|
          | » | Real time clock enabled  |      J15      | pins 1 & 6  |
          |   |                          |               |   closed    |
          |---+--------------------------+---------------+-------------|
          |   | Real time clock disabled |      J15      | pins 2 & 7  |
          |   |                          |               |   closed    |
          |---+--------------------------+---------------+-------------|
          | » | Parallel port enabled    |      J15      | pins 2 & 7  |
          |   |                          |               |    open     |
          |---+--------------------------+---------------+-------------|
          |   | Parallel port disabled   |      J15      | pins 3 & 8  |
          |   |                          |               |   closed    |
          |---+--------------------------+---------------+-------------|
          | » | Floppy drive interface   |      J15      | pins 3 & 8  |
          |   | enabled                  |               |    open     |
          |---+--------------------------+---------------+-------------|
          |   | Floppy drive interface   |      J15      | pins 4 & 9  |
          |   | disabled                 |               |   closed    |
          |---+--------------------------+---------------+-------------|
          | » | Serial port enabled      |      J15      | pins 4 & 9  |
          |   |                          |               |    open     |
          |---+--------------------------+---------------+-------------|
          |   | Serial port disabled     |      J15      | pins 5 & 10 |
          |   |                          |               |   closed    |
          |---+--------------------------+---------------+-------------|
          | » | Video mode TTL           |      SW1      | pins 5 & 10 |
          |   | monochrome               |               |    open     |
          |---+--------------------------+---------------+-------------|
          |   | Video mode CGA           |      SW1      |    Down     |
          |---+--------------------------+---------------+-------------|
          | » | Factory configured - do  | SW2/switch 1  |     Off     |
          |   | not alter                |               |             |
          |---+--------------------------+---------------+-------------|
          | » | NPU disabled             | SW2/switch 2  |     On      |
          |---+--------------------------+---------------+-------------|
          |   | NPU enabled              | SW2/switch 2  |     Off     |
          |---+--------------------------+---------------+-------------|
          | » | Factory configured - do  | SW2/switch 3  |     On      |
          |   | not alter                |               |             |
          |---+--------------------------+---------------+-------------|
          | » | Memory test 64KB         | SW2/switch 4  |     On      |
          |---+--------------------------+---------------+-------------|
          |   | Memory test all          | SW2/switch 4  |     Off     |
          |---+--------------------------+---------------+-------------|
          | » | Factory configured - do  | SW2/switch 5  |     Off     |
          |   | not alter                |               |             |
          |---+--------------------------+---------------+-------------|
          | » | Factory configured - do  | SW2/switch 6  |     Off     |
          |   | not alter                |               |             |
          |------------------------------------------------------------|
          | Note:The exact location of J8 is unknown.                  |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                     DRAM CONFIGURATION                     |
          |------------------------------------------------------------|
          | Size  |  Bank 0   |  Bank 1   |  Bank 2   |      J14       |
          |-------+-----------+-----------+-----------+----------------|
          | 512KB | (9) 4164  | (9) 4164  |   NONE    |   pins 2 & 3   |
          |       |           |           |           |     closed     |
          |-------+-----------+-----------+-----------+----------------|
          | 640KB | (9) 41256 | (9) 41256 | (9) 41128 |   pins 1 & 2   |
          |       |           |           |           |     closed     |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                  CPU SPEED CONFIGURARION                   |
          |------------------------------------------------------------|
          |             Speed             |            SW3             |
          |-------------------------------+----------------------------|
          |            4.77MHz            |            Down            |
          |-------------------------------+----------------------------|
          |            7.16MHz            |             Up             |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |                FLOPPY DISK DRIVES INSTALLED                |
          |------------------------------------------------------------|
          |  Number of Drives  |   SW2/switch 7    |   SW2/switch 8    |
          |--------------------+-------------------+-------------------|
          |         1          |        On         |        On         |
          |--------------------+-------------------+-------------------|
          |         2          |        Off        |        On         |
          |--------------------+-------------------+-------------------|
          |         3          |        On         |        Off        |
          |--------------------+-------------------+-------------------|
          |         4          |        Off        |        Off        |
          +------------------------------------------------------------+
       
          +------------------------------------------------------------+
          |              REAL TIME CLOCK INTERRUPT SELECT              |
          |------------------------------------------------------------|
          |            IRQ             |              J11              |
          |----------------------------+-------------------------------|
          |             2              |       pins 1 & 5 closed       |
          |----------------------------+-------------------------------|
          |             4              |       pins 2 & 6 closed       |
          |----------------------------+-------------------------------|
          |             5              |       pins 3 & 7 closed       |
          |----------------------------+-------------------------------|
          |             7              |       pins 4 & 8 closed       |
          +------------------------------------------------------------+