ADVANCED COMPUTER TECHNOLOGY, LTD.

ZX-25/HS, ZX-20/HS, ZX-16/HS

Processor         80386SX
Processor Speed   16/20/25MHz
Chip Set          ACT
Max. Onboard DRAM 8MB
Cache             None
BIOS              AMI
Dimensions        218mm x 218mm
I/O Options       None
NPU Options       80387SX

[Image]

                                CONNECTIONS

  Purpose                   Location   Purpose                   Location

  Turbo LED                   JP2      External battery           JP11

  Power LED & Keylock         JP5      Speaker                    JP14

  Reset switch               JP10      Turbo switch               JP17

                        USER CONFIGURABLE SETTINGS

                Function                     Jumper          Position

  »   Factory configured - do not alter        JP3              N/A

  »   Monitor type select color                JP6           pins 2 & 3
                                                              closed

      Monitor type select monochrome           JP6           pins 1 & 2
                                                              closed

  »   Factory configured - do not alter        JP7              N/A

  »   Factory configured - do not alter        JP8              N/A

  »   Factory configured - do not alter        JP9              N/A

  »   Battery select internal                 JP12           pins 2 & 3
                                                              closed

      Battery select external                 JP12           pins 1 & 2
                                                              closed

  »   Power good signal detect from           JP13           pins 1 & 2
      power supply                                            closed

      Power good signal detect from           JP13           pins 2 & 3
      board                                                   closed

  »   CPU speed select 20MHz or 25MHz         JP15           pins 1 & 2
                                                              closed

      CPU speed select 16MHz                  JP15           pins 2 & 3
                                                              closed

  »   I/O bus speed select 8MHz               JP16           pins 1 & 2
                                                              closed

      I/O bus speed select 6MHz               JP16           pins 2 & 3
                                                              closed

                            DRAM CONFIGURATION

     Size          Bank 0        Bank 1         Bank 2         Bank 3

     512KB      (2) 256K x 9      NONE           NONE           NONE

      1MB       (2) 256K x 9   (2) 256K x 9      NONE           NONE

     1.5MB      (2) 256K x 9   (2) 256K x 9   (2) 256K x 9      NONE

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

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

      3MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9        NONE

      4MB        (2) 1M x 9    (2) 1M x 9        NONE           NONE

      5MB       (2) 256K x 9   (2) 256K x 9   (2) 1M x 9     (2) 1M x 9

      6MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9        NONE

      8MB        (2) 1M x 9    (2) 1M x 9     (2) 1M x 9     (2) 1M x 9