“The 6509 is a low-cost microprocessor capable of solving a broad range of small-systems and memory management problems at minimum cost to the user.
A memory management system allows for up to One Mega-Byte of memory of ease in down loading languages, operating systems or other data.
The Three-State sixteen-bit Address Bus allows Direct Memory Accessing (DMA) and multi-processor systems sharing a common memory while the Four-bit Extended Address Register allows for up to a one Mega-Byte of data storage.
The internal processor architecture is identical to the Commodore Semiconductor Group 6502 to provide software compatibility.”
The graphics below were converted from a large .PDF on Richard Cini’s excellent site which is now defunct but can still be accessed on Archive.org HERE. It was reproduced October 17, 2002 with permission granted in July of 2002. Thanx again Richard!
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