sentence: among the components created by opencores contributors are : openrisc - a highly configurable risc central processing unit amber ( processor core ) - an arm - compatible risc central processing unit a zilog z80 clone usb 2.0 controller tri ethernet controller , 10/100/1000 mbit encryption units , for example des , aes & rsa hypertransport tunnel a pic16f84 core zet : an x86 compatible core openrisc asic in april 2011 opencores opened donations for a new project to develop a complete system on a chip design based on the openrisc processor and implement it into an asic - component .