68HCxx the accumulator-based low-end 68hc05 mc has few registers and a stripped-down instruction set with 64 instructions. 10 uncomplicated addressing modes, direct access a maximum of 64 kbytes, more than 180 versions of the 68hc05 available. the 68hc08 provides a code-compatible performance extension to the 68hc05 along with 78 new instructions and 16-bit index register, stack pointer and program counter. [ www.eg3.com | www.eg3.com/68HCxx ]