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- NEWS about the 68060 from MOTOROLA!
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- [Intel P5, Motorola 68060 In MPU Forum
- [Limelight.
- ] By Jonathan Cassell
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-
- Intel and Motorola engineers last week
- Detailed the superscalar, pipelined
- architectures of the respective P5 and
- 68060 microprocessors at the annual
- Microprocessor Forum in California.
-
- -P5 decription-
-
- Motorola's 060 is a 32-bit processor
- with a superscalar, pipelined
- architecture. It has more than 2
- million transitors, using a 0.5-micron,
- triple-layer metal 3.3 volt process in
- a static design. Performance will be
- 3.5 times the 25MHz 68040,or about 46
- Specmarks, according to Joe Circello,
- 68000 advanced microprocessor architect
- for Motorola.
-
- Separated in the 060 are instruction
- caches and data caches; instruction
- fetch pipelines (with four-stage
- instruction processor, a physically
- mapped 8Kbyte instruction cache with
- four-way self associative, a virtually
- mapped, 256-entry branch cache and a
- FIFO instruction buffer), and operand
- execution pipelines (with four-stage
- operand processor, a physically mapped
- 8Kbyte data cache with four way
- interleaving and a 4-entry, 32-bit
- write buffer).
-
- The floating point unit - implemented
- in the execution stage of the operand
- execution pipeline - is compatible with
- the 040 FPU programming model. Floating
- point execution times range from 1-24
- cycles. The 060 superscalar dispatch
- algorithm can execute 50 to 60 percent
- of integercode instructions as pairs
- with existing compilers.
-
- The 060 will come in 040-style
- packaging with a similiar external bus.
- The first versions will sample in the
- second half of 1993, go into production
- in Q1 1994, and run at 50MHz and 66MHz.
-