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Is the MC68000 a 32 bit bus?
The MC68000 has a 16-bit data bus and 24-bit address bus while the full architecture provides for 32-bit address and data buses. It is completely code-compatible with the MC68008 8-bit data bus implementation of the M68000 and is upward code compatible with the MC68010 virtual extensions and the MC68020 32-bit implementation of the architecture.
When did the Motorola 68000 microprocessor come out?
For the family of microprocessors developed from it, see Motorola 68000 series. For the 8-bit microprocessor introduced in 1974, see Motorola 6800.
Which is better the IBM 68000 or the Intel 8088?
IBM considered the 68000 for the IBM PC but chose the Intel 8088 because the 68000 was not ready; Walden C. Rhines wrote that thus “Motorola, with its superior technology, lost the single most important design contest of the last 50 years”. (IBM Instruments briefly sold the 68000-based IBM System 9000 laboratory computer systems.)
What’s the difference between Motorola and Hitachi 68HC000?
Motorola’s version is called the MC68HC000, while Hitachi’s is the HD68HC000. The 68HC000 offers speeds of 8–20 MHz. Except for using CMOS circuitry, it behaved identically to the HMOS MC68000, but the change to CMOS greatly reduced its power consumption.
What’s the difference between a 68000 and a 68EC000?
The 68EC000 chip and SCM68000 core remove the M6800 peripheral bus, and exclude the MOVE from SR instruction from user mode programs, making the 68EC000 and 68SEC000 the only 68000 CPUs not 100% object code compatible with previous 68000 CPUs when run in User Mode. When run in Supervisor Mode, there is no difference.
When did the 68000 instruction set get an update?
In 1982, the 68000 received a minor update to its instruction set architecture (ISA) to support virtual memory and to conform to the Popek and Goldberg virtualization requirements. The updated chip is called the 68010.
What’s the difference between Motorola 68000 and 8086?
Arriving late to the 16-bit arena affords the new processor more transistors (roughly 40,000 active versus 20,000 active in the 8086), 32-bit macroinstructions, and acclaimed general ease of use. The original MC68000 was fabricated using an HMOS process with a 3.5 µm feature size.