LEADING EDGE PRODUCTS, INC.
===========================

   MODEL D (REVISION 7)

   Processor    8088 (exact location unknown)                     
   Processor    4.77MHz                                           
   Speed        
   Chip Set     Unknown                                           
   Max. Onboard 768KB                                             
   DRAM         
   Cache        None                                              
   BIOS         Unknown                                           
   Dimensions   254mm x 218mm                                     
   I/O Options  Color monitor port, floppy drive interface, light 
                pen connector,                                    
                                                                  
                monochrome monitor port, parallel port, serial    
                port                                              
   NPU Options  8087                                              

<gopher://bitreich.org/I/th99/m/I-L/31831-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   | Purpose          | Location | Purpose           | Location |
   |------------------+----------+-------------------+----------|
   | Parallel port    |    J6    | Floppy drive      |   J15    |
   |                  |          | interface         |          |
   |------------------+----------+-------------------+----------|
   | Serial port      |    J7    | Keyboard          |   J18    |
   |------------------+----------+-------------------+----------|
   | Color monitor    |    J8    | Speaker           |   J19    |
   | port             |          |                   |          |
   |------------------+----------+-------------------+----------|
   | Monochrome port  |    J9    | Reset switch      |   J20    |
   |------------------+----------+-------------------+----------|
   | Light pen        |   J11    | Power-on LED      |   J21    |
   | connector        |          | indicator         |          |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |            Function             |   Jumper   |  Position   |
   |---------------------------------+------------+-------------|
   |>> | Factory configured - do not |     J5     |     N/A     |
   |   | alter                       |            |             |
   |---+-----------------------------+------------+-------------|
   |>> | Monitor enabled             |    J10     |   Closed    |
   |---+-----------------------------+------------+-------------|
   |   | Monitor disabled            |    J10     |    Open     |
   |---+-----------------------------+------------+-------------|
   |>> | Floppy drive interface      |    J13     | pins 4 & 9  |
   |   | enabled                     |            |   closed    |
   |---+-----------------------------+------------+-------------|
   |   | Floppy drive interface      |    J13     | pins 4 & 9  |
   |   | disabled                    |            |    open     |
   |---+-----------------------------+------------+-------------|
   |>> | Serial port enabled         |    J13     | pins 5 & 10 |
   |   |                             |            |   closed    |
   |---+-----------------------------+------------+-------------|
   |   | Serial port disabled        |    J13     | pins 5 & 10 |
   |   |                             |            |    open     |
   |---+-----------------------------+------------+-------------|
   |>> | Parallel port enabled       |    J13     | pins 3 & 8  |
   |   |                             |            |   closed    |
   |---+-----------------------------+------------+-------------|
   |   | Parallel port disabled      |    J13     | pins 3 & 8  |
   |   |                             |            |    open     |
   |---+-----------------------------+------------+-------------|
   |>> | Real Time Clock enabled     |    J13     | pins 2 & 7  |
   |   |                             |            |   closed    |
   |---+-----------------------------+------------+-------------|
   |   | Real Time Clock disabled    |    J13     | pins 2 & 7  |
   |   |                             |            |    open     |
   |---+-----------------------------+------------+-------------|
   |>> | Factory configured - do not |    J13     | pins 1 & 6  |
   |   | alter                       |            |    open     |
   |---+-----------------------------+------------+-------------|
   |>> | BIOS ROM type 8/16K         |    J16     |    Open     |
   |---+-----------------------------+------------+-------------|
   |   | BIOS ROM type 32K           |    J16     |   Closed    |
   |---+-----------------------------+------------+-------------|
   |>> | Video mode TTL mononchrome  |    SW1     |     Up      |
   |---+-----------------------------+------------+-------------|
   |   | Video mode CGA              |    SW1     |    Down     |
   |---+-----------------------------+------------+-------------|
   |>> | Factory configured - do not | SW2/switch |     Off     |
   |   | alter                       |     1      |             |
   |---+-----------------------------+------------+-------------|
   |>> | NPU disabled                | SW2/switch |     On      |
   |   |                             |     2      |             |
   |---+-----------------------------+------------+-------------|
   |   | NPU enabled                 | SW2/switch |     Off     |
   |   |                             |     2      |             |
   |---+-----------------------------+------------+-------------|
   |>> | Factory configured - do not | SW2/switch |     On      |
   |   | alter                       |     3      |             |
   |---+-----------------------------+------------+-------------|
   |>> | Memory test 64KB            | SW2/switch |     On      |
   |   |                             |     4      |             |
   |---+-----------------------------+------------+-------------|
   |   | Memory test all             | SW2/switch |     Off     |
   |   |                             |     4      |             |
   |---+-----------------------------+------------+-------------|
   |>> | Factory configured - do not | SW2/switch |     Off     |
   |   | alter                       |     5      |             |
   |---+-----------------------------+------------+-------------|
   |>> | Factory configured - do not | SW2/switch |     Off     |
   |   | alter                       |     6      |             |
   |------------------------------------------------------------|
   | Note:The exact location of J5 is unknown.                  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |  Size  |  Bank 0   |  Bank 1   |  Bank 2   |      J23      |
   |--------+-----------+-----------+-----------+---------------|
   | 512KB  | (9) 41256 | (9) 41256 |   NONE    |  pins 1 & 2   |
   |        |           |           |           |    closed     |
   |--------+-----------+-----------+-----------+---------------|
   | 768KB  | (9) 41256 | (9) 41256 | (9) 41256 |  pins 3 & 4   |
   |        |           |           |           |    closed     |
   |------------------------------------------------------------|
   | Note:Even though this system has 768KB installed, only     |
   | 640KB is available to the user.                            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                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             |              J12              |
   |----------------------------+-------------------------------|
   |             2              |       pins 1 & 5 closed       |
   |----------------------------+-------------------------------|
   |             4              |       pins 2 & 6 closed       |
   |----------------------------+-------------------------------|
   |             5              |       pins 3 & 7 closed       |
   |----------------------------+-------------------------------|
   |             7              |       pins 4 & 8 closed       |
   +------------------------------------------------------------+