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'''68000''' (MC68000, 68K),<br/>

a 16/32-bit [https://en.wikipedia.org/wiki/Complex_instruction_set_computer CISC] [https://en.wikipedia.org/wiki/Microprocessor microprocessor] designed and marketed by [https://en.wikipedia.org/wiki/Freescale_Semiconductor Freescale Semiconductor] since 1979, started as a division of [[Motorola]]. It was used in [[Atari ST]], [[Amiga|Commodore Amiga]], and [[Apple]] [[Macintosh]] personal computers, as well in [[Sun#1|Sun-1]] [https://en.wikipedia.org/wiki/Workstation workstations] and many [[Dedicated Chess Computers|dedicated chess computers]]. 68000 has an external 16-bit [https://en.wikipedia.org/wiki/Data_bus data bus] and 24 external address lines to index 16 MByte of physical [[Memory|memory]], eight 32-bit general-purpose data registers (D0-D7), and eight address registers (A0-A7). The last address register was also the standard [[Stack|stack]] pointer, and could be called either A7 or SP <ref>[https://en.wikipedia.org/wiki/Motorola_68000 Motorola 68000 from Wikipedia]</ref>. Despite different data- and address registers, 68000 was known for its [https://en.wikipedia.org/wiki/Orthogonal_instruction_set orthogonal instruction set] <ref>[http://68k.hax.com/ 68000 instructions]</ref>. Like its 8-bit predecessor [[6800]], but opposed to [[x86]], 68000 is a [[Big-endian]] machine.

=See also=