UNIDENTIFIED

ACE - 386SX - AR1

Processor         80386SX (exact location unknown)
Processor Speed   16/20/25/33MHz
Chip Set          Acer
Max. Onboard DRAM 16MB
Cache             None
BIOS              AMI
Dimensions        220mm x 220mm
I/O Options       None
NPU Options       80387SX (exact location unknown)

[Image]

                                CONNECTIONS

  Purpose                Location      Purpose                Location

  External battery          J4         Turbo switch         J8 pins 1 - 3

  Reset switch              J6         Turbo LED            J8 pins 4 - 5

  Speaker                   J7         Power LED &               J9
                                       keylock

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   ADS delay disabled                       J5            pins 2 & 3
                                                              closed

      ADS delay enabled                        J5            pins 1 & 2
                                                              closed

  »   NPU synchronous with CPU                 JP2           pins 1 & 2
                                                              closed

      NPU asynchronous with CPU                JP2           pins 2 & 3
                                                              closed

  »   Factory configured - do not alter        JP3              N/A

  »   Monitor type select monochrome           JP4           pins 1 & 2
                                                              closed

      Monitor type select color                JP4           pins 2 & 3
                                                              closed

  »   Parity check disabled                    JP6             Open

      Parity check enabled                     JP6            Closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     512KB      (1) 256K x 9   (1) 256K x 9      NONE           NONE

      1MB       (1) 256K x 9   (1) 256K x 9   (1) 256K x 9  (1) 256K x 9

      2MB        (1) 1M x 9    (1) 1M x 9        NONE           NONE

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

      8MB        (1) 4M x 9    (1) 4M x 9        NONE           NONE

     16MB        (1) 4M x 9    (1) 4M x 9     (1) 4M x 9     (1) 4M x 9

                   CPU SPEED CONFIGURATION

        Speed                JP1                  JP5

        16MHz          pins 1 & 2 closed   pins 1 & 2 closed

        20MHz          pins 2 & 3 closed   pins 1 & 2 closed

        25MHz          pins 1 & 2 closed   pins 2 & 3 closed

        33MHz          pins 2 & 3 closed   pins 2 & 3 closed