Motorola 68008

[Image:KL_Motorola_MC68008.jpg|thumb|Motorola MC68008]
Image:Sincalir-QL-68008-Processor.jpg|thumb|68008 in a Sinclair QL motherboard
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. The 68008 was available with 20 or 22 address lines 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. It was still faster than competing 8-bit microprocessors, because internally the 68008 behaves identically to the 68000 and has the same microarchitecture.
Motorola ended production of the 68008 in 1996.

Details

The 68008 is an HMOS chip with about with a speed grade of. There are two versions of the chip. The original is in a 48-pin dual in-line package with a 20-bit address bus, allowing it to use up to 1 megabyte of memory. A later version is in a 52-pin plastic leaded chip carrier; this version has a 22-bit address bus and can support of RAM.

Usages

The Sinclair QL microcomputer and Luxor ABC 1600 use the 68008 as their main processor.