Infineon C517, C509, 80C537, and Variants
The Infineon C517, C517A, and C509 perform high-speed 32-bit and 16-bit arithmetic operations which improve many int, long, and float operations.
The C517, C517A, C509, and C515C provide 8 data pointers that may be used to increase the speed of memory to memory operations.
The MOD517 directive instructs the Cx51 Compiler to generate code that utilizes these advanced features.