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Level 2 System Resources

The minimum configuration for a PC to satisfy the Level 2 specification includes the following items:

  • A 25 Mhz 486SX microprocessor with 4 MB of RAM

  • A 3.5-inch high-density floppy disk drive

  • A hard disk drive with at least 160 MB of disk space

  • A 101-key keyboard with a standard DIN connector or one that provides identical functionality by using key combinations

  • A two-button mouse with a serial or bus connector

  • A MIDI (Musical Instrument Digital Interface) port that includes MIDI Out, MIDI In, and MIDI Thru, and that has interrupt support for input and FIFO transfer

  • An IBM-style analog or digital joystick (game) port

  • A color monitor with a display resolution of 640 by 480 pixels with 65,536 colors

  • System software that offers binary compatibility with Windows 3.0 or Windows 3.1

In addition, the recommended performance goal for the video adapter (VGA+) is 1.2 million pixels per second using 40 percent or less of the CPU bandwidth. The device-independent bitmaps (DIBs) used to measure this performance goal have color depths of 1, 4, and 8 bits, and can use run-length encoding or be unencoded. A second method of measuring the video performance is to deliver 256-color, 320 by 240 pixel digital-video images at 15 frames per second.

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