Western Design Center 65816

The W65816 (also: 65C816), a 16-bit microprocessor developed by the Western Design Center (WDC), is an expanded and compatible successor to the venerable MOS Technology 6502. The 65816 has two 16-bit index registers, a stack pointer, a 16-bit direct page register, and a 24-bit address bus.

Notable uses of the W65816

• in the Apple IIGS (2.8 MHz)
• in the Super Famicom/Super Nintendo video game consoles (3.58 MHz)
• in the SuperCPU accelerators for the Commodore 64 and 128 (20 MHz)

References

• Eyes, David; Lichty, Ron (1986). Programming the 65816 including the 6502, 65C02, and 65802. New York: Brady/Prentice Hall. ISBN 0-89303-789-3.

External links

• W65C816S information from WDC (with link to datasheet in PDF)
• A 6502 Programmer's Introduction to the 65816. By Brett Tabke, with instruction set summary from Creative Micro Designs.

This article (or an earlier version of it) contains material from FOLDOC, used with permission.