
ACER, INC.

L50

  Data bus:                  32-bit VL-bus

  Size:                      Three-quarter length, full-height card

  Hard drive supported:      Four IDE(AT) drives

  Floppy drives supported:   Two 360KB, 720KB, 1.2MB, 1.44MB, or 2.88MB
                             drives

[Image]

                        CONNECTIONS

                Function                      Location

  40-pin primary IDE(AT) connector              CN1

  40-pin secondary IDE(AT) connector            CN2

  34-pin cable connector - floppy drive         CN3

  10-pin serial port 1                          CN4

  10-pin serial port 2                          CN5

  16-pin game port                              CN6

  15-pin video port                             CN7

  25-pin parallel port                          CN8

  VESA feature connector                        CN9

  4-pin connector - drive active LED            JP28

                             VGA CONFIGURATION

            Mode                      JP4                    JP5

            Enabled           pins 1 & 2 closed      pins 1 & 2 closed

            Disabled           pins 2 & 3 closed      pins 2 & 3 closed

                        USER CONFIGURABLE SETTINGS

               Function                    Location           Setting

     IRQ9 disabled                     JP3/pins 1 & 2        closed

      IRQ9 enabled                      JP3/pins 2 & 3        closed

     Primary IDE(AT) interface         JP6/pins 1 & 2        closed
      enabled

      Primary IDE(AT) interface         JP6/pins 2 & 3        closed
      disabled

     Floppy drive interface enabled    JP11/pins 1 & 2       closed

      Floppy drive interface            JP11/pins 2 & 3       closed
      disabled

     Ignores cable select              JP12/pins 1 & 2       closed
      configuration for floppy
      drives

      Checks for cable select           JP12/pins 2 & 3       closed
      configuration

     Game port enabled                 JP13/pins 1 & 2       closed

      Game port disabled                JP13/pins 2 & 3       closed

     Parallel port IRQ 7 select        JP18/pins 1 & 2       closed

      Parallel port IRQ 5 select        JP18/pins 2 & 3       closed

                      PARALLEL PORT ADDRESS SELECTION

             LPT                      JP14                   JP15

          LPT1 (378h)          pins 1 & 2 closed      pins 1 & 2 closed

           LPT2 (278h)          pins 1 & 2 closed      pins 2 & 3 closed

           LPT3 (3BCh)          pins 2 & 3 closed      pins 2 & 3 closed

             Disabled           pins 2 & 3 closed      pins 1 & 2 closed

                      SERIAL PORT 1 ADDRESS SELECTION

             COM                      JP21                   JP22

          COM1 (3F8h)          pins 1 & 2 closed      pins 1 & 2 closed

           COM2 (2F8h)          pins 1 & 2 closed      pins 2 & 3 closed

           COM3 (3E8h)          pins 2 & 3 closed      pins 1 & 2 closed

             Disabled           pins 2 & 3 closed      pins 2 & 3 closed

                      SERIAL PORT 2 ADDRESS SELECTION

             COM                      JP23                   JP24

          COM2 (2F8h)          pins 1 & 2 closed      pins 1 & 2 closed

           COM1 (3F8h)          pins 1 & 2 closed      pins 2 & 3 closed

           COM4 (2E8h)          pins 2 & 3 closed      pins 1 & 2 closed

             Disabled           pins 2 & 3 closed      pins 2 & 3 closed

                     SERIAL PORT 1 INTERRUPT SELECTION

       IRQ          JP25/Pins 1 & 2    JP26/Pins 1 & 2   JP27/Pins 1 & 2

        IRQ4           closed              open               open

         IRQ3            open              closed              open

         IRQ5            open               open              closed

                     SERIAL PORT 2 INTERRUPT SELECTION

       IRQ          JP25/Pins 2 & 3    JP26/Pins 2 & 3   JP27/Pins 2 & 3

        IRQ3            open              closed              open

         IRQ4           closed              open               open

         IRQ5            open               open              closed

                     PARALLEL PORT MODE CONFIGURATION

          Mode                     JP16                     JP17

            SPP            pins 1 & 2 closed        pins 1 & 2 closed

             EPP            pins 1 & 2 closed        pins 2 & 3 closed

             ECP            pins 2 & 3 closed        pins 1 & 2 closed

                        DMA SELECTION FOR ECP MODE

         Channel                   JP19                     JP20

           DMA 3           pins 1 & 2 closed        pins 1 & 2 closed

            DMA 1           pins 2 & 3 closed        pins 2 & 3 closed

                             MEMORY ADDRESSING

      Linear Address                 JP1                     JP2

             64MB            pins 1 & 2 closed       pins 1 & 2 closed

              2GB             pins 2 & 3 closed       pins 2 & 3 closed

                      SECONDARY IDE ADDRESS SELECTION

           Address                     JP7                    JP8

            Secondary          pins 1 & 2 closed      pins 1 & 2 closed

              Primary           pins 1 & 2 closed      pins 2 & 3 closed

             Disabled           pins 2 & 3 closed      pins 2 & 3 closed

                     SECONDARY IDE INTERRUPT SELECTION

           IRQ                      JP9                     JP10

             15             pins 1 & 2 closed       pins 1, 2 & 3 open

              10            pins 1, 2 & 3 open        pins 1 & 2 closed

              12            pins 1, 2 & 3 open        pins 2 & 3 closed

              14             pins 2 & 3 closed       pins 1, 2 & 3 open

                 DRAM CONFIGURATION

       Size             Bank 0          Bank 1

       1MB           (8) 256K x 4        None

       2MB           (8) 256K x 4    (2) 256K x 16

