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