LAVA COMPUTER MANUFACTURING, INC.
=================================

   MULTIFUNCTION BOARD

   Card Type               Multifunction                          
   Chip Set                Unidentified                           
   Maximum Onboard Memory  512KB DRAM                             
   I/O Options             Parallel port, serial port             
   Hard Drives supported   None                                   
   Floppy drives supported None                                   
   Data Bus                8-bit ISA                              
   Card Size               Full-length, full-height               

<gopher://bitreich.org/I/th99/i/I-L/53413-1.png>
   

   +------------------------------------------------------------+
   |                        CONNECTIONS                         |
   |------------------------------------------------------------|
   |       Function        | Label |      Function      | Label |
   |-----------------------+-------+--------------------+-------|
   | 26-pin parallel port  |  CN1  | 25-pin serial port |  CN2  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 USER CONFIGURABLE SETTINGS                 |
   |------------------------------------------------------------|
   |                Function                | Label | Position  |
   |----------------------------------------+-------+-----------|
   |>> | Parity check enabled               |  J4   |  Closed   |
   |---+------------------------------------+-------+-----------|
   |   | Parity check disabled              |  J4   |   Open    |
   |---+------------------------------------+-------+-----------|
   |>> | Real Time Clock enabled            |  J9   |  Closed   |
   |---+------------------------------------+-------+-----------|
   |   | Real Time Clock disabled           |  J9   |   Open    |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                     DRAM CONFIGURATION                     |
   |------------------------------------------------------------|
   |     Size     |    Bank 0     |    Bank 1    |    Bank 2    |
   |--------------+---------------+--------------+--------------|
   |     64KB     |     64KB      |     None     |     None     |
   |--------------+---------------+--------------+--------------|
   |    128KB     |     64KB      |     64KB     |     None     |
   |--------------+---------------+--------------+--------------|
   |    192KB     |     64KB      |     64KB     |     64KB     |
   |--------------+---------------+--------------+--------------|
   |    256KB     |     256KB     |     None     |     None     |
   |--------------+---------------+--------------+--------------|
   |    320KB     |     256KB     |     64KB     |     None     |
   |--------------+---------------+--------------+--------------|
   |    384KB     |     256KB     |     64KB     |     64KB     |
   |--------------+---------------+--------------+--------------|
   |    512KB     |     256KB     |    256KB     |     None     |
   |------------------------------------------------------------|
   |      Note:Size of chips is unidentified.                   |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |                 DRAM JUMPER CONFIGURATION                  |
   |------------------------------------------------------------|
   |     Size      |     SW/4     |     SW/5     |     SW/6     |
   |---------------+--------------+--------------+--------------|
   |     None      |      On      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |     64KB      |      On      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     128KB     |      On      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |     192KB     |      On      |     Off      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     256KB     |     Off      |      On      |      On      |
   |---------------+--------------+--------------+--------------|
   |     320KB     |     Off      |      On      |     Off      |
   |---------------+--------------+--------------+--------------|
   |     384KB     |     Off      |     Off      |      On      |
   |---------------+--------------+--------------+--------------|
   |     512KB     |     Off      |     Off      |     Off      |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |           STARTING MEMORY ADDRESS CONFIGURATION            |
   |------------------------------------------------------------|
   | Starting |    Maximum RAM on LAVA     | SW/1 | SW/2 | SW/3 |
   | Address  |    Multifunction Board     |      |      |      |
   |----------+----------------------------+------+------+------|
   |   64KB   |           512KB            |  On  |  On  |  On  |
   |----------+----------------------------+------+------+------|
   |  128KB   |           512KB            |  On  |  On  | Off  |
   |----------+----------------------------+------+------+------|
   |  192KB   |           512KB            |  On  | Off  |  On  |
   |----------+----------------------------+------+------+------|
   |  256KB   |           384KB            |  On  | Off  | Off  |
   |----------+----------------------------+------+------+------|
   |  320KB   |           320KB            | Off  |  On  |  On  |
   |----------+----------------------------+------+------+------|
   |  384KB   |           256KB            | Off  |  On  | Off  |
   |----------+----------------------------+------+------+------|
   |  448KB   |           192KB            | Off  | Off  |  On  |
   |----------+----------------------------+------+------+------|
   |  512KB   |           128KB            | Off  | Off  | Off  |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              PARALLEL PORT ADDRESS SELECTION               |
   |------------------------------------------------------------|
   |        Setting        |        J7        |       J8        |
   |-----------------------+------------------+-----------------|
   |      LPT1 (378h)      |      Closed      |      Open       |
   |-----------------------+------------------+-----------------|
   |      LPT2 (278h)      |       Open       |     Closed      |
   |-----------------------+------------------+-----------------|
   |       Disabled        |       Open       |      Open       |
   |------------------------------------------------------------|
   |      Note: When IBM Monochrome Display/Printer adapter is  |
   |      installed in the system, the parallel port will       |
   |      automatically be reconfigured to LPT2 if the original |
   |      setting was LPT1 and to LPT3 if the original setting  |
   |      was LPT2.                                             |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               SERIAL PORT ADDRESS SELECTION                |
   |------------------------------------------------------------|
   |        Setting         |       J5        |       J6        |
   |------------------------+-----------------+-----------------|
   |>> |    COM1 (3F8h)     |     Closed      |      Open       |
   |---+--------------------+-----------------+-----------------|
   |   |    COM2 (2F8h)     |      Open       |     Closed      |
   |---+--------------------+-----------------+-----------------|
   |   |      Disabled      |      Open       |      Open       |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |              SERIAL PORT INTERRUPT SELECTION               |
   |------------------------------------------------------------|
   |        IRQ         |  J2(pins 1 & 2)   |  J3(pins 2 & 3)   |
   |--------------------+-------------------+-------------------|
   |>> |  IRQ4 (COM1)   |       Open        |      Closed       |
   |---+----------------+-------------------+-------------------|
   |   |  IRQ3 (COM2)   |      Closed       |       Open        |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |             PARALLEL PORT INTERRUPT SELECTION              |
   |------------------------------------------------------------|
   |             IRQ7              |             J1             |
   |-------------------------------+----------------------------|
   |            Enabled            |           Closed           |
   |-------------------------------+----------------------------|
   |           Disabled            |            Open            |
   +------------------------------------------------------------+

   +------------------------------------------------------------+
   |               MISCELLANEOUS TECHNICAL NOTES                |
   |------------------------------------------------------------|
   | The LAVA Multifunction Board requires switch settings on   |
   | system board for PC-1, PC-2 and PC-XT. On PC-1 and PC-2    |
   | switches are set to represent total amount of memory       |
   | installed. On PC-XT, switches represent amount of memory   |
   | installed on system board only and do not include memory   |
   | on Lava Multifunction Board.                               |
   +------------------------------------------------------------+