The 65802 (also: 65C802) is a 65816 CPU in a 6502 pinout compatible package. It was produced by Western Design Center (WDC Part# W65C802S) and GTE during the mid-late 80's. The chip was designed as a upgrade path from the 8-bit 6502/65C02 CPU to the new 65816 16-bit CPU. To do this, the 24-bit address bus (16MB memory space) of the 65816 was reduced to the 16-bit addressing (64k memory space) that the 6502/65C02 were able to access. All of the bank select registers, etc are still intact from the 65816 in the 65802 CPU's core, they just have no effect when used. 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 central processing unit (CPU) is the part of a computer that interprets and carries out the instructions contained in the software. ... The MOS Technology 6502 is an 8-bit microprocessor designed by MOS Technology in 1975. ... Pinout is a term used in electronics to describe how a connector is wired. ... If you were looking for the Western Digital Corporation, see Western Digital. ... This article or section should include material from Bell Atlantic This article or section should include material from GTE Verizon Communications (NYSE: VZ) is a local exchange telephone company formed by the merger of Bell Atlantic, a former Bell Operating Company, and GTE, which was the largest independant local exchange... An integrated circuit (IC) is a thin chip consisting of at least two interconnected semiconductor devices, mainly transistors, as well as passive components like resistors. ... 8-bit refers to the number of bits used in the data bus of a computer. ... The 65C02 is a slightly upgraded version of the popular and venerable 6502 microprocessor. ... In computer science, 16-bit is an adjective used to describe integers that are at most two bytes wide, or to describe CPU architectures based on registers, address buses, or data buses of that size. ... An address bus is (part of) a computer bus, used by CPUs or DMA-capable units for communicating the physical addresses of computer memory elements/locations that the requesting unit wants to access (read/write). ... This article is about a unit of data measurement. ... Depending on the context in which it is used, the word kilobyte may mean either 1,000 or 1,024 bytes. ... In computer architecture, a processor register is a small amount of very fast computer memory used to speed the execution of computer programs by providing quick access to commonly used values—typically, the values being in the midst of a calculation at a given point in time. ...

Typically, when hardware manufacturers were designing a project from the ground up, they used the more powerful 65816.