- PC System Design Guide
The PC System Design Guide (also known as the PC 97, PC 98, PC 99, or PC 2001 specification) is a series of hardware design requirements and recommendations for IBM PC compatible personal computers, compiled by Microsoft and Intel Corporation during 1997–2001. They were aimed to help manufacturers provide hardware that makes best use of the capabilities of the Microsoft Windows operating system, and to simplify setup and use of such computers.
Every part of a standard computer and the most common kinds of peripheral devices are defined with specific requirements. Systems and devices that meet the specification should be automatically recognized and configured by the operating system.
Four versions of the PC System Design Guide were released. Within each version, a distinction was made between the requirements of a Consumer PC, Office PC and an Entertainment PC.
Version Date PC 97 February 9, 1998 PC 98 December 31, 1998 PC 99 July 14, 1999 PC 2001 November 2, 2000
- Introduced color code for PS/2 keyboard (purple) and mouse (green) connectors (see below)
- 200 MHz Pentium processor with MMX technology (or equivalent performance)
- 256 KB L2 cache
- 32 MB RAM (recommended: 64 MB of 66 MHz DRAM)
- ACPI 1.0 (including power button behavior)
- Fast BIOS power-up (limited RAM test, no floppy test, minimal startup display, etc.)
- BIOS Y2K compliance
- PXE preboot environment
- 300 MHz CPU
- 64 MB RAM
- comprehensive color coding scheme for ports and connectors (see below)
Final version. First to require IO-APICs to be enabled on desktop systems. Places a greatly increased emphasis on legacy-reduced and legacy-free systems. Some "legacy" items such as ISA expansion slots and device dependence on MS-DOS are forbidden entirely, while others are merely strongly discouraged.
Color-coding scheme for connectors and ports
The perhaps most end-user visible and lasting impact of PC 99 was that it introduced a 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 and motherboard manufacturers. Some of the color codes have also been widely adopted by peripheral manufacturers.
Color Function Connector on PC Mouse and keyboard Green PS/2 mouse / pointing device 6-pin mini-DIN female Purple PS/2 keyboard 6 pin mini-DIN female General input/output Black USB USB Type A female White USB 2.0 USB 2.0 Type A female Sky blue USB 3.0 SuperSpeed USB 3.0 SuperSpeed Type A female Grey Firewire / IEEE 1394 6 pin FireWire 400 Burgundy Parallel port 25 pin D female Teal or turquoise Serial port 9 pin D male Video Blue Analog monitor 15-pin VGA female White Digital monitor DVI female Yellow S-Video 4 pin mini-DIN Yellow Composite video RCA jack Audio Pink Analog microphone audio input (mono or stereo). 3.5 mm TRS Light blue Analog line level audio input. 3.5 mm TRS Lime green Analog line level audio output for the main stereo signal (front speakers or headphones). 3.5 mm TRS Black Analog line level audio output for the surround speakers (rear speakers). 3.5 mm TRS Silver Analog line level audio output for 'side speakers'. 3.5 mm TRS Orange Center speaker / Subwoofer 3.5 mm TRS Gold Game port / MIDI 15 pin D female
- ^ http://www.freeopenbook.com/pc-hardware-nutshell-3/pchardnut3-chp-1-sect-1.html
- ^ PC 99 System Design Guide, Intel Corporation and Microsoft Corporation, 14 July 1999. Chapter 3: PC 99 basic requirements (PC 99 System Design Guide (Self-extracting .exe archive). Requirement 3.18.3: Systems use a color-coding scheme for connectors and ports. Accessed 2009-02-05
- Multimedia PC
- Legacy-free PC
- PC System Design Guide downloads – Microsoft
Audio and Video Interfaces and Connectors Audio OnlyAnalogInterface: PC System Design Guide Connectors: TRS 3.5mmDigital Video OnlyAnalogDigital and
Video and AudioDigital
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