
ACER, INC.

MFB-A

Card Type            Multi I/O card
Chipset/Controller   Unidentified
I/O Options          Memory, game port, parallel port, serial port (2).
Maximum DRAM         3MB

[Image]

                                CONNECTIONS

      Purpose          Location            Purpose           Location

  Game port               J2          Parallel port             J5

  Serial port 2 -         J3          MME-A connector           N/A
  internal

  Serial port 1 -         J4
  external

  Note: The MME-A connector is not identified on manufacturers
  documentation

                          GAME PORT CONFIGURATION

                 Setting                               SW3/6

                  Enabled                               On

                   Disabled                             Off

                        PARALLEL PORT CONFIGURATION

       LPT/Address/IRQ            SW3/4         SW3/5           JP2

         LPT1/378h/IRQ7            On           Off         Pins 1 & 2
                                                               closed

          LPT1/378h/IRQ5            On           Off         Pins 2 & 3
                                                               closed

          LPT2/278h/IRQ7           Off            On         Pins 1 & 2
                                                               closed

          LPT2/278h/IRQ5           Off            On         Pins 2 & 3
                                                               closed

             Disabled              Off           Off            N/A

                      SERIAL PORT 1 & 2 CONFIGURATION

       Port 1             Port 2        SW3/1        SW3/2       SW3/3

       COM1/3F8h       COM2/2F8h         On          Off          On

        COM2/2F8h        Disabled        Off          On          Off

         Disabled        Disabled        Off          Off         Off

                    SERIAL PORT 1 & 2 INTERRUPT SELECT

        Port 1             Port 2             JP5               JP6

          IRQ4             IRQ3           Pins 2 & 3         Closed
                                            closed

           IRQ3           Disabled         Pins 1 & 2          Open
                                            closed

         Disabled         Disabled           Open              Open

                            SERIAL PORT 1 TEST

        Port 1                JP3              JP4             JP10

      DCD signal high     Pins 2 & 3          N/A              N/A
                            closed

         DCD signal        Pins 1 & 2          N/A              N/A
           ground           closed

      DSR signal high        N/A           Pins 2 & 3          N/A
                                             closed

         DSR signal           N/A           Pins 1 & 2          N/A
           ground                            closed

      CTS signal high        N/A              N/A           Pins 1 & 2
                                                              closed

         CTS signal           N/A              N/A           Pins 2 & 3
           ground                                             closed

                            SERIAL PORT 2 TEST

        Port 2                JP7              JP8              JP9

      DCD signal high     Pins 1 & 2          N/A              N/A
                            closed

         DCD signal        Pins 2 & 3          N/A              N/A
           ground           closed

      DSR signal high        N/A           Pins 1 & 2          N/A
                                             closed

         DSR signal           N/A           Pins 2 & 3          N/A
           ground                            closed

      CTS signal high        N/A              N/A           Pins 1 & 2
                                                              closed

         CTS signal           N/A              N/A           Pins 2 & 3
           ground                                             closed

                               PARITY CHECK

                 Setting                                JP1

                  Enabled                            Closed

                  Disabled                             Open

                          STARTING MEMORY ADDRESS

   Memory/Address     SW1/1    SW1/2    SW1/3    SW1/4     SW1/5    SW1/6

   256KB/040000h        On       On       On       On       On      Off

   512KB/080000h       Off       On       On       On       On       On

    1MB/100000h         On      Off       On       On       On       On

   1.5MB/180000h       Off      Off       On       On       On       On

    2MB/200000h         On       On      Off       On       On       On

   2.5MB/280000h       Off       On      Off       On       On       On

    3MB/300000h         On      Off      Off       On       On       On

   3.5MB/380000h       Off      Off      Off       On       On       On

    4MB/400000h         On       On       On      Off       On       On

   4.5MB/480000h       Off       On       On      Off       On       On

    5MB/500000h         On      Off       On      Off       On       On

   5.5MB/580000h       Off      Off       On      Off       On       On

                          STARTING MEMORY ADDRESS

    Memory/Address     SW1/1    SW1/2    SW1/3    SW1/4    SW1/5    SW1/6

     6MB/600000h         On       On      Off      Off      On       On

    6.5MB/680000h       Off       On      Off      Off      On       On

     7MB/700000h         On      Off      Off      Off      On       On

    7.5MB/780000h       Off      Off      Off      Off      On       On

     8MB/800000h         On       On      On       On       Off      On

    8.5MB/880000h       Off       On      On       On       Off      On

     9MB/900000h         On      Off      On       On       Off      On

    9.5MB/980000h       Off      Off      On       On       Off      On

     10MB/A00000h        On       On      Off      On       Off      On

    10.5MB/A80000h      Off       On      Off      On       Off      On

     11MB/B00000h        On      Off      Off      On       Off      On

    11.5MB/B80000h      Off      Off      Off      On       Off      On

     12MB/C00000h        On       On      On       Off      Off      On

    12.5MB/C80000h      Off       On      On       Off      Off      On

     13MB/D00000h        On      Off      On       Off      Off      On

   13.5.5MB/D80000h     Off      Off      On       Off      Off      On

     14MB/E00000h        On       On      Off      Off      Off      On

    14.5MB/E80000h      Off       On      Off      Off      Off      On

     15MB/F00000h        On      Off      Off      Off      Off      On

    15.5MB/F80000h      Off      Off      Off      Off      Off      On

                             MEMORY CONFIGURATION

  Bank    Bank    Bank    Bank    Bank    Bank   SW2/1   SW2/2   SW2/3   SW2/4
   0       1       2       3       4       5

  128KB   N/A     N/A     N/A     N/A     N/A     On      On      On     Off

  512KB   N/A     N/A     N/A     N/A     N/A    Off      On      On      On

  128KB   512KB   N/A     N/A     N/A     N/A    Off      On      On     Off

  512KB   512KB   N/A     N/A     N/A     N/A     On     Off      On      On

  128KB   512KB  512KB    N/A     N/A     N/A     On     Off      On     Off

  512KB   512KB  512KB    N/A     N/A     N/A    Off     Off      On      On

  128KB   512KB  512KB   512KB    N/A     N/A    Off     Off      On     Off

  128KB   512KB  512KB   512KB    N/A     N/A     On      On     Off      On

  128KB   512KB  512KB   512KB   512KB    N/A     On      On     Off     Off

  512KB   512KB  512KB   512KB   512KB    N/A    Off      On     Off      On

  128KB   512KB  512KB   512KB   512KB   512KB   Off      On     Off     Off

  512KB   512KB  512KB   512KB   512KB   512KB    On     Off     Off      On

  Notes:(1) Banks 3, 4 & 5 are located on supplemental card MME-A.

  (2) 4164-type chips are only used in Bank 0 and fill system base RAM from
  512KB to 640KB.

  (3) 41256/120ns-chips are used in all banks.

