Ads
related to: motorola 68020
Search results
Results from the WOW.Com Content Network
The Motorola 68020 is a 32-bit microprocessor from Motorola, released in 1984. A lower-cost version was also made available, known as the 68EC020 . In keeping with naming practices common to Motorola designs, the 68020 is usually referred to as the "020", pronounced "oh-two-oh" or "oh-twenty".
Motorola mainly used even numbers for major revisions to the CPU core such as 68000, 68020, 68040 and 68060. The 68010 was a revised version of the 68000 with minor modifications to the core, and likewise the 68030 was a revised 68020 with some more powerful features, none of them significant enough to classify as a major upgrade to the core.
A Motorola 68020 processor. The Motorola 68020 was the first 32-bit Mac processor, first used on the Macintosh II.The 68020 has many improvements over the 68000, including an instruction cache, and was the first Mac processor to support a paged memory management unit, the Motorola 68851.
The Motorola 68030 ("sixty-eight-oh-thirty") is a 32-bit microprocessor in the Motorola 68000 family. It was released in 1987. The 68030 was the successor to the Motorola 68020, and was followed by the Motorola 68040. In keeping with general Motorola naming, this CPU is often referred to as the 030 (pronounced oh-three-oh or oh-thirty).
To support lower-cost systems and control applications with smaller memory sizes, Motorola introduced the 8-bit compatible MC68008, also in 1982. This is a 68000 with an 8-bit data bus and a smaller (20-bit) address bus. After 1982, Motorola devoted more attention to the 68020 and 88000 projects.
The Motorola MC68010 and Motorola MC68012 are 16/32-bit microprocessors from Motorola, released in 1982 as successors to the Motorola 68000. [3] The 68010 and 68012 added virtualization features, optimized loops and fixed several small flaws to the 68000.
The Cromemco XXU processor board, introduced in 1986. At 16.7 MHz, it is the fastest CPU ever developed for the S-100 bus. It uses a Motorola 68020 processor with 68881 co-processor and 16 Kbytes of high-speed cache memory.
Similarly, the Motorola 68030 represents a process improvement on the 68020 with the MMU and a small data cache (256 bytes) moved on-chip. The 68030 was released in speed ratings up to 50 MHz. The jump from the 68000/68010 to the 68020/68030, however, represents a major overhaul, with innumerable individual changes.
Ads
related to: motorola 68020