Compaq Portable 486
The Compaq Portable 486 is a computer released by Compaq Computer Corporation in 1991. It was the last portable computer/"luggable" released under the Compaq Portable series of computers.

The computer was released in several models with different hard disk configurations and in two screen types, a cheaper monochrome version and a more expensive active matrix color version, known as the Compaq Portable 486c. The street price upon its release for with a  was  for the monochrome version and US$9,999 for the active matrix color version For a model with  the price was , for the monochrome version and US$10,999 for the active matrix color version, but was not available until after May 1992.

Both versions are equipped with a socketed  Intel 80486DX CPU,  DRAM (72-pin SIMM),   floppy,  (P-ATA), and SCSI port for CD-ROM or tape. On the front of the unit there two dials underneath the PC-speaker to adjust the brightness of the screen and the volume of the PC-speaker. The PC-speaker in the Compaq Portable 486 is unique in that there is a 3.5 mm audio input jack on the side of the unit to allow a third party ISA sound card to pass through its audio output to the PC speaker.

Compaq also released 2 versions of the Compaq Portable 486 with a faster, 66 MHz Intel 80486DX2 CPU, named the Compaq Portable 486/66 for the monochrome version and the Compaq Portable 486/66c for the color version

Compaq also worked with Network General which released branded versions of the Compaq Portable 486 as "Network Sniffers"

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, 11 ms, half sine (nonoperating Vibration, Operating 0.25 G, 5 – 500 Hz, 1/2 octave/min sweep Nonoperating 1.0 G, 5 – 500 Hz, 1/2 octave/min sweep

References

486