Xtensa System emulator
Two executables cover simulation of both Xtensa endian options,
qemu-system-xtensa and qemu-system-xtensaeb. Two different
machine types are emulated:
- Xtensa emulator pseudo board "sim" 
- Avnet LX60/LX110/LX200 board 
The sim pseudo board emulation provides an environment similar to one provided by the proprietary Tensilica ISS. It supports:
- A range of Xtensa CPUs, default is the DC232B 
- Console and filesystem access via semihosting calls 
The Avnet LX60/LX110/LX200 emulation supports:
- A range of Xtensa CPUs, default is the DC232B 
- 16550 UART 
- OpenCores 10/100 Mbps Ethernet MAC