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The W65C816S (also 65C816 or 65816) is a 16-bit microprocessor (MPU) developed and sold by the Western Design Center (WDC). Introduced in 1985, the W65C816S is an enhanced version of the WDC 65C02 8-bit MPU, itself a CMOS enhancement of the venerable MOS Technology 6502 NMOS MPU.
The CPU core is a two-way superscalar in-order RISC processor. [3] Based on the MIPS R5900, it implements the MIPS-III instruction set architecture (ISA) and much of MIPS-IV, in addition to a custom instruction set developed by Sony which operated on 128-bit wide groups of either 32-bit, 16-bit, or 8-bit integers in single instruction, multiple data (SIMD) fashion (e.g. four 32-bit integers ...
SIMD Instructions – PowerPC750 + roughly 50 new SIMD instructions, geared toward 3D graphics; Front-side Bus – 64-bit enhanced 60x bus to GPU/chipset at 162 MHz clock with 1.3 GB/s peak bandwidth; On-chip Cache – 64 KB 8-way associative L1 cache (32/32 KB instruction/data). 256 KB on-die, 2-way associative L2 cache; DMIPS – 1125 ...
The 6507 was used in the popular Atari 2600 video game console, the design of which divides the 8 KB memory space in half, allocating the lower half to the console's internal RAM and peripherals, and the upper half to the Game Cartridge, so Atari 2600 cartridges have a 4 KB address limit (and the same capacity limit unless the cartridge ...
IBM and Nintendo have revealed that the Espresso processor is a PowerPC-based microprocessor with three cores on a single chip to reduce power consumption and increase speed. The CPU and the graphics processor are placed on a single substrate as a multi-chip module (MCM) to reduce complexity, increase the communication speed between the chips ...
The Zilog Z80 is an 8-bit microprocessor designed by Zilog that played an important role in the evolution of early computing. Launched in 1976, it was designed to be software-compatible with the Intel 8080, offering a compelling alternative due to its better integration and increased performance.
Local-bus video was considered a requirement at the time, though it remained popular with users of EISA systems. The 486DX-50 was soon eclipsed by the clock-doubled i486DX2, which although running the internal CPU logic at twice the external bus speed (50 MHz), was nevertheless slower because the external bus ran at only 25 MHz. The i486DX2 at ...
Several early video arcade games were built around the 8080 microprocessor. The first commercially-available arcade video game to incorporate a microprocessor was Gun Fight, Midway Games' 8080-based reimplementation of Taito's discrete-logic Western Gun, which was released in November 1975.