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 at helping manufacturers provide hardware that made the 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.
Versions
Four versions of the PC System Design Guide were released. In PC-97, a distinction was made between the requirements of a Basic PC, a Workstation PC and an Entertainment PC. In PC-98, the Mobile PC was added as a category. In PC 2001, the Entertainment PC was dropped.
Version | Date |
---|---|
PC-97 | February 9, 1998 |
PC-98 | December 31, 1998 |
PC-99 | July 14, 1999 |
PC 2001 | November 2, 2000 |
PC-97
Required:
- 120 MHz Pentium or MIPS R4x00 or Digital Alpha 21064 (EV4) or IBM PowerPC architecture (latter three only under Windows NT)
- 16 MB RAM
Initial version.
- Introduced color code for PS/2 keyboard (purple) and PS/2 mouse (green) connectors
PC-98
Aimed at systems to be used with Windows 98 or Windows 2000. Required:
- 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
It was published as ISBN 1-57231-716-7.
PC-99
Required:
- 300 MHz CPU
- 64 MB RAM
- USB
- Comprehensive color-coding scheme for ports and connectors (see below)
Strongly discouraged:
- Non plug-and-play hardware
- ISA slots
It was published as ISBN 0-7356-0518-1.
PC 2001
Required:
- 667 MHz CPU
- 64 MB RAM
Final version. First to require IO-APICs to be enabled on all 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.[1]
Color-coding scheme for connectors and ports
Perhaps the 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.[2] 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 3395C | PS/2 mouse / pointing device | 6-pin mini-DIN female | ||
Purple 2715C | PS/2 keyboard | 6-pin mini-DIN female | ||
Gold 131C | Game port / MIDI | 15-pin D female | ||
General input/output | ||||
Black 426C | USB 1 | USB Type A female | ||
Grey 424C | IEEE 1394 (FireWire) | 6-pin FireWire 400 | ||
Burgundy 235C | Parallel port | 25-pin D female | ||
Teal or turquoise 322C | Serial port | 9-pin D male | ||
Video | ||||
Blue 661C | Analog monitor | 15-pin VGA female | ||
White | Digital monitor | DVI female | ||
Yellow 123C | Video out: S-Video | 4-pin mini-DIN | ||
Yellow 123C | Video out: Composite video | RCA jack | ||
Audio | ||||
Pink 701C | Analog microphone audio input (mono or stereo). | 3.5 mm TRS | ||
Light blue 284C | Analog line level audio input. | 3.5 mm TRS | ||
Lime green 577C | Analog line level audio output. | 3.5 mm TRS | ||
Orange 157C | Analog audio output for the center speaker and Subwoofer | 3.5 mm TRS | ||
Brown 4645C | Analog audio output for "right-to-left" speakers. | 3.5 mm TRS |
See also
- ATX
- Legacy-free PC
- Multimedia PC
- Sound card
- PoweredUSB (proprietary high-power USB extension using other color-coded ports)
References
- ^ Robert Bruce Thompson, Barbara Fritchman Thompson (24 July 2003). PC Hardware in a Nutshell (3rd ed.). O'Reilly & Associates, Inc. p. 1.1 PCs Defined. ISBN 0-596-00513-X. Archived from the original on July 11, 2011. Retrieved January 4, 2011.
{{cite book}}
: CS1 maint: uses authors parameter (link) - ^ 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
External links
- Legacy PC Design Guides – Microsoft Download Center
PDF versions: