4000SX  (250-4900)           Features          Faxback Doc. # 1522

 STANDARD FEATURES 

        : Intel 80386SX microprocessor, 16 megahertz, 32-bit CPU
          Offers true Intel 386 processing in a 286 hardware
          environment.

        : Tandy designed and engineered with full IBM PC/AT
          compatibility. Uses hardware and software compatible
          with the IBM standard for IBM PC/XT/AT computers.

        : Five 16-bit expansion slots. Five expansion slots for
          standard 16-bit expansion adapters. (one of five is
          reserved for video.)

        : Can use MS-DOS, MS OS/2, or XENIX operating systems.
          The availability of multiple operating systems lets
          you choose the system that best supports your software.

        : One megabyte of standard high-speed page-mode memory,
          upgradable to as much as 16 megabytes. Large memory
          capacities let you use some of the more sophisticated
          desktop publishing, CAD/CAM, and database software.
 
        : High-capacity, 1.44M, 3 1/2 inch diskette drive
          Read and write 3 1/2 inch diskettes, in standard or             ³
          high-densities.                                                 ³
                                                                          ³
        : Four disk drive bays.                                           ³
          You can expand your system to have as many as two 
          diskette drives and two hard drives. (Disk drives can be 
          3 1/2 inch and/or 5 1/4 inch.)

        : Built-in diskette drive controller.
          You can connect an additional 3 1/2 inch 720K/1.44M
          drive or 5 1/4 inch 360K/1.2M drive.

        : Integrated Drive Electronics (IDE) connector.

        : Built-in serial port

        : Built-in parallel port

        : Battery-backed internal clock

        : Sculptured 101-key enhanced keyboard

        : 200-watt power supply

        : A keylock

          Let's you lock the computer's cover and lock out the
          keyboard and the reset switch, to prevent unauthorized
          use.
          STANDARD OPTIONS

        : Local Memory Expansion Adapter.
          With a second /local Memory Expansion Adapter, you can
          upgrade memory to as much as 16M, operating at an average
          of 0.7 wait states at 16 MHz CPU speed.
 
        : Memory Upgrade Kits (256K and 1M SIMMs)

        : Additional diskette drives, hard drives, disk and tape
          cartridge systems, which can include:
             - 3 1/2 inch DD (720K or 1.44M)
             - 5 1/4 inch DD (360K or 1.2M)
             - Internal hard drives (3 1/2 inch and/or 5 1/4 inch
               formats)
             - Tape and/or disk cartridge systems

        : Support for an optional math coprocessor (Intel 80387SX)
       
         THE MONITOR                                                               ³
        The Tandy 4000 SX has a VGA video expansion adapter that
        is compatible with Tandy's VGM-100, VGM-200, and VGM-300
        monitors as well as equivalent VGA analog monitors. You
        can use software written for the following video standards:
           - VGA
           - MCGA
           - EGA 
           - CGA
           - MDA
           - HERCULES
        To emulate one of these video standards, use the vga.exe
        utility found on the utilities diskette.

 THE KEYBOARD
        The 101-key enhanced keyboard features:
             - Function keys
             - Typewriter keys
             - Cursor keys
             - Numeric keys