High Quality Content by WIKIPEDIA articles! Rabbit Semiconductor is the company which designs and sells the Rabbit family of microcontrollers and microcontroller modules. For development, it provides Dynamic C, a non-standard dialect of C with proprietary structures for multitasking. Rabbit Semiconductor was purchased in 2006 by Digi International. Before the purchase, Rabbit Semiconductor was a division of Z-World, Inc. Z-World developed and manufactured embedded controller products as well as embedded software development environments. The Rabbit processor family shares many features with the Zilog Z80/Z180 processors. For example, the registers of a Rabbit 2000/3000 processor are almost the same as the registers of a Z80/Z180 processor. The Rabbit 4000 processor expands to include the use of 32-bit registers. The instruction set of Rabbit processors also closely resembles the instruction set of the Z80/Z180 family. It should be noted that while the opcodes of many instructionsare the same between the Rabbit 2000/3000 processors and Z80/Z180 processors, the two families of processors are not binary compatible.