PC 99
From Wikipedia, the free encyclopedia
PC 99 was a specification for PCs jointly developed by Microsoft and Intel in 1998. Its aim was to encourage the standardization of PC hardware to aid Windows compatibility. It set out minimum hardware specifications for various types of PC (e.g. Office, Entertainment) which were typical for the time (e.g. 300 MHz CPU with 64Mb RAM on the Entertainment PC). It strongly discouraged the use of non plug and play hardware (in particular ISA slots) and mandated the use of USB.
[edit] Color Codes
The most lasting impact of PC 99 was that it set out the color code for the various standard types of plugs and connectors used on PCs. As many of the connectors look very similar, particularly to a novice PC user, this made it far easier for people to connect peripherals to the correct ports on a PC. This color code was gradually adopted by almost all PC, motherboard and peripheral manufacturers.
| Color | Function | Connector | |
|---|---|---|---|
| Green | PS/2 Mouse / pointing device | 6 pin mini-DIN | |
| Purple | PS/2 Keyboard | 6 pin mini-DIN | |
| Black | USB port | USB Type A | |
| Grey | Firewire / IEEE 1394 | 6 pin FireWire 400 | |
| Burgundy | Parallel port | 25 pin D | |
| Teal or turquoise | Serial port | 9 pin D | |
| Blue | Analog VGA | 15 pin VGA | |
| White | Digital monitor | DVI | |
| Yellow | S-Video | 4 pin mini-DIN | |
| Yellow | Composite video | RCA jack | |
| Pink | Analog microphone audio input. | 3.5 mm jack | |
| Light blue | Analog line level audio input. | 3.5 mm jack | |
| Lime green | Analog line level audio output for the main stereo signal (front speakers or headphones). | 3.5 mm jack | |
| Brown | Analog line level audio output for 'Right-to-left speaker'. | 3.5 mm jack | |
| Orange | S/PDIF digital audio output (sometimes used as an analog line output for a center speaker instead) | 3.5 mm jack | |
| Gold | Game port / MIDI | 15 pin D | |
[edit] See also
[edit] External links
- Intel and Microsoft - PC 99 System Design Guide (PDF, 1533KB)
- PC Design Guides (site might not be functional anymore)
- Microsoft - PC System Design Guide Downloads
- Microsoft - WHDC
