The COP8 microcontroller from National Semiconductor is an 8 bit CISC core microcontroller, whose main features are:

Large amount of I/O pins.
Plenty of Flash memory/ROM for code and data (up to 32 KB).
Very low EMI. No known bugs.
Many integrated peripherals (meant as single chip design).
In-System Programming
Free assembler toolchain. Commercial C compilers available.
Free Multitasking OS and TCP/IP stack.

Fonte e mais detalhes aqui.

Site da Texas Instruments: COP8.