NEC TECHNOLOGIES, INC.

APC IV SERIES (G9YAN)

Processor              80286 (exact location unidentified)
Processor Speed        6/8MHz
Chip Set               Unidentified
Maximum Onboard Memory 10MB (on external memory cards)
Cache                  None
BIOS                   Unidentified
Dimensions             355mm x 305mm
I/O Options            Floppy drive interface, parallel port, serial ports
                       (2)
NPU Options            80287 (exact location unidentified)

[Image]

                                CONNECTIONS

       Function            Label             Function            Label

  Serial port 1            COM1       Indicator panel              P4

  Serial port 2            COM2       Parallel port                P5

  Speaker                   P1        Floppy drive interface       P9

  External battery          P3        Indicator panel             P10

                        USER CONFIGURABLE SETTINGS

                 Setting                     Label           Position

  »   ROM area reserved on I/O channel        5N2         Pins 3 & 6, 4 &
                                                             5 closed

      APC IV ROM at location 4K, 4M           5N2         Pins 1 & 8, 2 &
      enabled                                                7 closed

  »   BIOS type select 27256                  6N1         Pins 3 & 6, 4 &
                                                             5 closed

      BIOS type select 27128                  6N1         Pins 1 & 8, 2 &
                                                             7 closed

  »   Factory configured - do not alter      14D/3             Off

  »   Parallel port enabled                  14D/4              On

      Parallel port disabled                 14D/4             Off

  »   Serial port channel 1 enabled          14D/5              On

      Serial port channel 1 disabled         14D/5             Off

  »   Serial port channel 2 enabled          14D/6              On

      Serial port channel 2 disabled         14D/6             Off

  »   Channel 1 = COM1/channel 2 = COM2      14D/7              On

      Channel 1 = COM2/channel 2 = COM1      14D/7             Off

  »   Monitor type select color              14D/10             On

      Monitor type select monochrome         14D/10            Off

  »   Factory configured - do not alter      21D/1              On

  »   Factory configured - do not alter      21D/2              On

  »   Factory configured - do not alter      21D/3              On

  »   Factory configured - do not alter      21D/4              On

  »   Factory configured - do not alter      21D/5              On

  »   ROM type select IBM                    21D/6              On

      ROM type select APC                    21D/6             Off

                                DRAM

  Note: The orientation and location of the DRAM is unidentified.

                         DRAM JUMPER

       Bank 0               Bank 0                18K2

        256KB                64KB          Pins 3 & 4 closed

        256KB                None          Pins 1 & 2 closed

        256KB               256KB                 Open

                                SERIAL PORT

     Setting          14D/1         14D/2         14D/8         14D/9

  RS-232 enabled        On           Off           On            Off

  RS-232 disabled      Off           On            Off            On

                                 I/O WAIT

                 Setting                                22H1

   Normal operation 8-bit I/O cycle with     Pins 3 & 10, 4 & 9 closed
                 4 waits

     3 wait I/O cycle with I/O address       Pins 2 & 11, 4 & 9 closed
            between 000 & 0FF.

     2 wait I/O cycle with I/O address       Pins 3 & 10, 5 & 8 closed
            between 000 & 0FF.

            Note: Pins 6 & 7 open for normal operation. Close only for
            early detection or RAS & ALE signals. Pins 1 & 12 open for
            normal operation (1 wait state). Close only for 0 wait
            states.

[Image]

                           DRAM

  Note: The orientation and chip sizes are unidentified.

                           MEMORY CARD SWITCHES

  Expansion cards    SW1/1      SW1/2       SW1/3      SW1/4      SW1/5
     installed

         1            Off        Off         Off        On         Off

         2            Off        Off         On         On         Off

         3            Off         On         Off        On         Off

         4            Off         On         On         On         Off

         5             On        Off         Off        On         Off

                       MEMORY CARD SWITCHES (CON’T)

  Expansion cards    SW1/6      SW1/7      SW1/8      SW1/9      SW1/10
    installed

        1             Off        Off        Off         On         On

        2             Off        Off         On         On         On

        3             Off         On        Off         On         On

        4             Off         On         On         On         On

        5              On        Off        Off         On         On

                       MEMORY CARD SWITCHES (CON’T)

  Expansion cards     SW2/1      SW2/2      SW2/3      SW2/4      SW2/5
     installed

         1             Off        Off        On         Off        Off

         2             Off        On         Off        Off        Off

         3             Off        On         On         Off        Off

         4             On         Off        Off        Off        Off

         5             On         Off        On         Off        Off

                       MEMORY CARD SWITCHES (CON’T)

  Expansion cards    SW2/6      SW2/7      SW2/8      SW2/9      SW2/10
     installed

         1            Off        Off         On        Off         On

         2            Off         On        Off        Off         On

         3            Off         On         On        Off         On

         4             On        Off        Off        Off         On

         5             On        Off         On        Off         On

               MISCELLANEOUS TECHNICAL NOTE

  The location of pin 1 on all jumpers is unidentified.