Embedded system designer, hardware and software. Did a lot of work with 6502, 6809, 68K, 6805, 68HC11, Z-80, Microchip PIC, Atmel AVR, and in recent years, mostly ARM, especially Cortex-M0/0+/3/4 microcontrollers. Also some DSP and FPGA work, including design of processor cores in VHDL.