Compaq Portable 486
Encyclopedia
The Compaq Portable 386 is a computer released by Compaq Computer Corporation in 1992. Its street price upon its release with a was . For a model with the price was , but was not available initially in may 1992. Both models are equipped with an Intel 80486DX2
Intel 80486DX2
The Intel 80486DX2 is a CPU produced by Intel that was introduced in 1992. The i486DX2 was nearly identical to the i486DX but for the addition of clock multiplier circuitry. It was the first chip to use clock doubling, whereby the processor runs two internal logic clock cycles per external bus cycle...

 CPU
Central processing unit
The central processing unit is the portion of a computer system that carries out the instructions of a computer program, to perform the basic arithmetical, logical, and input/output operations of the system. The CPU plays a role somewhat analogous to the brain in the computer. The term has been in...

, DRAM (72-pin SIMM), floppy, (P-ATA), . Brightness control. SCSI
SCSI
Small Computer System Interface is a set of standards for physically connecting and transferring data between computers and peripheral devices. The SCSI standards define commands, protocols, and electrical and optical interfaces. SCSI is most commonly used for hard disks and tape drives, but it...

 port for CD-ROM
CD-ROM
A CD-ROM is a pre-pressed compact disc that contains data accessible to, but not writable by, a computer for data storage and music playback. The 1985 “Yellow Book” standard developed by Sony and Philips adapted the format to hold any form of binary data....

 or tape
Magnetic tape data storage
Magnetic tape data storage uses digital recording on to magnetic tape to store digital information. Modern magnetic tape is most commonly packaged in cartridges and cassettes. The device that performs actual writing or reading of data is a tape drive...

.
Environmental limits are:
  • Temperature operating 10 - 40 °C, nonoperating -30 - 60 °C
  • Relative humidity (noncondensing) Operating 20% - 80%, Nonoperating 5% - 90%
  • Maximum unpressurized altitude operating , nonoperating
  • Shock 40 G
    G-force
    The g-force associated with an object is its acceleration relative to free-fall. This acceleration experienced by an object is due to the vector sum of non-gravitational forces acting on an object free to move. The accelerations that are not produced by gravity are termed proper accelerations, and...

    , 11 ms
    Millisecond
    A millisecond is a thousandth of a second.10 milliseconds are called a centisecond....

    , half sine (nonoperating Vibration, Operating 0.25 G, 5 - 500 Hz, 1/2 octave
    Octave
    In music, an octave is the interval between one musical pitch and another with half or double its frequency. The octave relationship is a natural phenomenon that has been referred to as the "basic miracle of music", the use of which is "common in most musical systems"...

    /min sweep Nonoperating 1.0 G, 5 - 500 Hz, 1/2 octave/min sweep
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