The Western Design Center (WDC), located in Mesa, Arizona, USA, is a company developing and manufacturing MOS 65xx-based microprocessors, microcontrollers (µCs), and related support chips. WDC was founded in 1978 by co-holder of the MOS Technology 6502 patent, Bill Mensch, himself a former MOS employee.
In addition to the actual microchips, WDC offers chips designs in the form of IP cores to be used inside other chips (like ASICs), and provides ASIC and embedded systems consulting services revolving around their processor designs. WDC also makes C compilers, assembler/linker packages, simulators, development/evaluation boards, and in-circuit emulators for their processors.
| Name | Type | Comments |
|---|---|---|
| W65C02S | 8-bit CPU | Bug-fixed static core CMOS version of the originally NMOS 6502 |
| W65C134S | 8-bit µC | Microcontroller with W65C02S CPU core |
| W65C21S | I/O chip | Compatible with the 6520 Peripheral Interface Adapter (PIA) |
| W65C22S | I/O chip | Compatible with the 6522 Versatile Interface Adapter (VIA) |
| W65C51S | I/O chip | EIA-232 serial communications chip compatible with the 6551 asynchronous communications interface adapter (ACIA) |
| W65C816S | 16-bit CPU | 16-bit compatible follow-up to the W65C02, featuring 24-bit memory addressing |
| W65C802S | 16-bit CPU | A 65C816 core in a 6502 pin-compatible package (out of production) |
| W65C265S | 16-bit µC | Microcontroller with W65C816S CPU core |