
NCR CORPORATION

CLASS 3304

Processor               80386SX
Speed                   16/20MHz
Chip Set                Unidentified
Max. Onboard DRAM       1MB
BIOS                    Unidentified
Cache                   None
Dimensions              353mm x 265mm
I/O Options             Proprietary external memory card, VGA port,
                        parallel port, serial ports (2), floppy drive
                        interfaces (2), IDE interface, proprietary AT bus
NPU Options             80387SX

[Image]

                                CONNECTIONS

       Purpose          Location            Purpose           Location

  VGA port                 J1         IDE interface              P8

  External floppy          J2         Internal floppy            P9
  drive interface                     drive interface

  Parallel port            J6         IDE/floppy drive           P10
                                      power

  Serial port (9           P4         Proprietary                S1
  pin)                                external memory
                                      port

  Serial port (25          P5         Proprietary AT bus         S2
  pin)                                slot

                        USER CONFIGURABLE SETTINGS

              Function                  Jumper/Switch         Position

     CMOS memory normal operation           JP1              pins 1 & 2
                                                               closed

      CMOS memory clear                      JP1              pins 2 & 3
                                                               closed

     Bus speed select slow                 SW1/1                Off

      Bus speed select fast                 SW1/1                On

     Pipeline mode disabled                SW1/2                Off

      Pipeline mode enabled                 SW1/2                On

     Memory 0-512KB enabled                SW1/3                Off

      Memory 0-256KB enabled,               SW1/3                On
      256-512KB disabled

     Memory 512-1024KB enabled             SW1/4                Off

      Memory 512-1024KB disabled            SW1/4                On

     SMEM - Command in intern              SW1/5                On
      cycles disabled

      SMEM - Command in intern              SW1/5                Off
      cycles enabled

     CPU speed select automatic            SW1/6                Off

      CPU speed select 8MHz                 SW1/6                On

     Monitor type select color             SW2/1                On

      Monitor type select                   SW2/1                Off
      monochrome

     Power on speed select high            SW2/2                On

      Power on speed select low             SW2/2                Off

     Factory configured - do not          SW201/1               Off
      alter

     Factory configured - do not          SW201/2               Off
      alter

     BIOS type select AT                  SW201/3               Off

      BIOS type select PS/2                SW201/3               On

     Monitor type select standard         SW201/4               Off
      display

      Monitor type select                  SW201/4               On
      multisync display

     Monitor type select VGA              SW201/5               On
      enabled

      Monitor type select VGA              SW201/5               Off
      disabled

     Standard interrupt handling          SW201/6               Off

      Special application                  SW201/6               On
      interrupt

     Floppy drive interface               SW301/1               On
      enabled

      Floppy drive interface               SW301/1               Off
      disabled

     IDE drive installed                  SW301/2               Off

      IDE drive not installed              SW301/2               On

     AT bus IDE interface pin 34          SW301/3               Off
      select -PDIAG

      AT bus IDE interface pin 34          SW301/3               On
      select GND

     IDE interface enabled                SW301/4               Off

      IDE interface disabled               SW301/4               On

     Factory configured - do not          SW301/5               Off
      alter

     CMOS memory normal operation         SW301/6               On

      CMOS memory clear                    SW301/6               Off

                                  USER CONFIGURABLE SETTINGS (CON'T)

     Parallel port enabled                                          SW601/1               Off

      Parallel port disabled                                         SW601/1                On

     Parallel port address select 378 - 37Fh                        SW601/2               Off

      Parallel port address select 278 - 27Fh                        SW601/2                On

     Serial port (P5) enabled                                       SW601/3               Off

      Serial port (P5) disabled                                      SW601/3                On

     Serial port (P4) enabled                                       SW601/4               Off

      Serial port (P4) disabled                                      SW601/4                On

     Serial port (P5) address select 3F8 - 3FFh                     SW601/5               Off

      Serial port (P4) address select 3F8 - 3FFh                     SW601/5                On

     Factory configured - do not alter                              SW601/6               Off

    Notes: On main boards not having a JP1, CMOS memory functions are controlled by SW301/switch 6.

  Chipset & CPU locations unverified.

                DRAM CONFIGURATION

          Size                     Bank 0

           1MB                   (8) 44256

  Note:Memory size and location is unidentified.

                        DRAM MAPPING CONFIGURATION

  Ext memory   Mapping area     SW2/3      SW2/4      SW2/5       SW2/6

     0MB          100000 -       Off         On         On         On
                  160000h

     1MB          200000 -        On        Off         On         On
                  260000h

     2MB          300000 -       Off        Off         On         On
                  360000h

     3MB          400000 -        On         On        Off         On
                  460000h

     4MB          500000 -       Off         On        Off         On
                  560000h

     5MB          600000 -        On        Off        Off         On
                  660000h

     6MB          700000 -       Off        Off        Off         On
                  760000h

     7MB          800000 -        On         On         On         Off
                  860000h

     8MB          900000 -       Off         On         On         Off
                  960000h

     9MB          A00000 -        On        Off         On         Off
                  A60000h

    10MB          B00000 -       Off        Off         On         Off
                  B60000h

    11MB          C00000 -        On         On        Off         Off
                  C60000h

    12MB           D00000        Off         On        Off         Off
                  D60000h

    13MB          E00000 -        On        Off        Off         Off
                  E60000h

    14MB          F00000 -       Off        Off        Off         Off
                  F60000h

                            DRIVE CONFIGURATION

                   Type                       SW401/1         SW401/2

    1 internal; drive A or 2 internal;          Off             Off
  drive A in lower slot/drive B in upper
      slot or 1 internal, 1 external;
    internal drive A/external drive B

    1 external; drive A or 2 internal;          On               On
  drive A in upper slot/drive B in lower
      slot or 1 internal, 1 external;
    internal drive B/external drive A

