Motorola 68020 Processor die shots and description
1985 production 68020 ‘XC’ denotes a not fully qualified device.
In 1979 Motorola wow’d the world with the introduction of the MC68000 MACSS (Motorola Advanced Computer System on Silicon). One of the first single chip 32-bit processors. In 1982 the design was upgraded and revised, and released as the 68010. Performance wasn’t that much better then the original 68k so it saw much smaller adoption.
In 1984 Motorola continued the 68k line with the 68020. Speed was greatly improved, up to 33MHz. It was originally made on a 2 micron HCMOS process, allowing the design to use 200,000 transistors and integrate additional addressing modes, co-processor support, and multi-processor support.
The Swedish Computer archeology blog Ehliar has a nice article and die shots on its architecture and design. Check it out.
