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The Motorola 68008 is an 8/32-bit microprocessor introduced by Motorola in 1982. It is a version of 1979's Motorola 68000 with an 8-bit external data bus, as well as a smaller address bus.[1] The 68008 was available with 20 or 22 address lines (respective to 48-pin or 52-pin package) which allowed 1 MB or 4 MB address space versus the 16 MB addressable on the 68000. The 68008 was designed to work with lower cost and simpler 8-bit memory systems. Because of its smaller data bus, it was roughly half as fast as a 68000 of the same clock speed.[1] It was still faster than competing 8-bit microprocessors,[dubious – discuss] because internally the 68008 behaves identically to the 68000 and has the same microarchitecture.[2]
Motorola ended production of the 68008 in 1996.[3]
- ^ a b Motorola (1993). "M68000 8-/16-/32-Bit Microprocessors User's Manual, Ninth Edition" (PDF). NXP Semiconductors.
- ^ Motorola 1993, p. 1-2.
- ^ comp.sys.m68k Usenet posting, May 16, 1995; also see other posts in thread. The end-of-life announcement was in late 1994; according to standard Motorola end-of-life practice, final orders would have been in 1995, with final shipments in 1996.