Page "Motorola 6809" Paragraph 18

Hitachi also produced its own 6809-based machines, the MB6890 and later the S1.

These were primarily for the Japanese market, but some were exported to and sold in Australia.

There the MB6890 was dubbed the " Peach ", probably in ironic reference to the popularity of the Apple II.

The S1 was notable in that it contained paging hardware extending the 6809's native 64 kilobyte ( 64 × 2 < sup > 10 </ sup > byte ) addressing range to a full 1 megabyte ( 1 × 2 < sup > 20 </ sup > byte ) in 4 KB pages.

It was similar in this to machines produced by SWTPC, Gimix, and several other suppliers.

TSC produced a Unix-like operating system uniFlex which ran only on such machines.

OS-9 Level II, also took advantage of such memory management facilities.

Most other computers of the time with more than 64 KB of memory addressing were limited to bank switching where much if not all the 64 KB was simply swapped for another section of memory.