ACER, INC.

EISA 486LXE (MODEL L433S)

Processor         80486SX/80487SX/80486DX/ODP486SX/80486DX2
Processor Speed   25/33/50(internal)/50/66(internal)MHz
Chip Set          SIS
Max. Onboard DRAM 128MB
SRAM Cache        128/256KB
BIOS              Acer
Dimensions        220mm x 260mm
I/O Options       32-bit VESA card slot
NPU Options       4167

[Image]

                                CONNECTIONS

  Purpose                 Location      Purpose                Location

  Power LED & keylock     CN4/1 - 5     Turbo switch          CN4/15 - 17

  Speaker                CN4/7 - 10     Reset switch          CN4/19 & 20

  Turbo LED              CN4/12 & 13    32-bit VESA card          S1

                        USER CONFIGURABLE SETTINGS

               Function                     Jumper           Position

  »   VESA bus wait states select 0          JP8            pins 2 & 3
                                                              closed

      VESA bus wait states select 1          JP8            pins 1 & 2
                                                              closed

             DRAM CONFIGURATION

  Size         Bank 0            Bank 1

   1MB      (4) 256K x 9          NONE

   2MB      (4) 256K x 9      (4) 256K x 9

   4MB       (4) 1M x 9           NONE

   5MB      (4) 256K x 9       (4) 1M x 9

   8MB       (4) 1M x 9        (4) 1M x 9

  16MB       (4) 4M x 9           NONE

  20MB       (4) 1M x 9        (4) 4M x 9

  32MB       (4) 4M x 9        (4) 4M x 9

  64MB      (4) 16M x 9           NONE

  128MB     (4) 16M x 9       (4) 16M x 9

     CPU SPEED CONFIGURATION FOR CH9001 SYSTEM CLOCK CHIP

           CPU Speed                        JP9

      33/66(internal)MHz             pins 1 & 4 closed

      25/50(internal)MHz             pins 3 & 6 closed

             40MHz              pins 1 & 2 and 4 & 5 closed

             50MHz                   pins 2 & 5 closed

                            SRAM CONFIGURATION

      Size          Cache SRAM          Location        Jumpers JP6 & JP7

      128KB         (4) 32K x 8          Bank 0         pins 2 & 3 closed

      256KB         (8) 32K x 8        Banks 0 & 1      pins 1 & 2 closed