
NEC TECHNOLOGIES, INC.

POWERMATE EXPRESS 486SX/20E, 486SX/25E

Processor               80486SX
Processor Speed         20/25MHz
Chip Set                Intel
Max. Onboard DRAM       16MB
Cache                   None
BIOS                    NEC
Dimensions              330.2mm x 218.4mm
I/O Options             Proprietary CPU module slot, keyboard/bus mouse
                        interface,serial ports (2), parallel port, video
                        port, proprietary video card sockets, proprietary
                        external memory card slot, IDE interface, floppy
                        drive interface
NPU Options             80487SX/4167

[Image]

                                CONNECTIONS

  Purpose                Location     Purpose                  Location

  Proprietary CPU           J6        Video port                  P6
  module

  Proprietary               J7        Keyboard/Bus mouse          P7
  external memory                     interface
  card

  Proprietary video      J8, J9, &    Fan power                   P8
  card                      J10

  IDE interface             P1        IDE interface LED           P9

  Floppy drive              P2        External battery           P10
  interface

  Parallel port             P3        Power supply            P11 & P12

  Serial port (COM1)        P4        Drive power                P13

  Serial port (COM2)        P5        Drive power                P14

                        USER CONFIGURABLE SETTINGS

                 Function                     Jumper         Position

     Password enabled                         3F1           pins 2 & 3
                                                              closed

      Password disabled                        3F1           pins 1 & 2
                                                              closed

     Test mode disabled                       10A1            Open

      Test mode enabled                        10A1           Closed

     I/O recovery disabled                    11B5            Open

      I/O recovery enabled                     11B5           Closed

     NEC VGA adapter disabled (U.S.           15A1            Open
      setting)

      NEC VGA adapter enabled                  15A1           Closed

     Manufacturing test disabled              15K1           closed

      Manufacturing test enabled               15K1            open

     BIOS flash reprogramming disabled        17H1          pins 2 & 3
                                                              closed

      BIOS flash reprogramming enabled         17H1          pins 1 & 2
                                                              closed

     ROM type select 27C256 (28F256)          18F1          pins 1 & 2
                                                              closed

      ROM type select 27C512 (28F512)          18F1          pins 2 & 3
                                                              closed

                DRAM CONFIGURATION

      Size            Bank 0           Bank 1

       4MB        (2) 256K x 36    (2) 256K x 36

       8MB         (2) 1M x 36          NONE

      16MB         (2) 1M x 36      (2) 1M x 36

              PARALLEL PORT CONFIGURATION

          Setting                      15C3

    LPT1/IRQ7, LPT2/IRQ5     pins 1 & 2, 5 & 6 closed

    LPT1/IRQ5, LPT2/IRQ7     pins 2 & 3, 4 & 5 closed

[Image]

                        USER CONFIGURABLE SETTINGS

                Function                    Jumper           Position

     Test mode disabled                  15A2 & 15A3       pins 1 & 2
                                                              closed

      Test mode enabled                   15A2 & 15A3       pins 2 & 3
                                                              closed

