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

[Image]

                                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.