Datasheet

PENTIUM® PROCESSOR WITH MMX™ TECHNOLOGY E
4
5/23/97 10:47 AM 24318502.DOC
INTEL CONFIDENTIAL
(until publication date)
1.0. MICROPROCESSOR
ARCHITECTURE OVERVIEW
The Pentium
®
processor with MMX™ technology
extends the Intel Pentium family of microprocessors.
It is binary compatible with the 8086/88, 80286,
Intel386™ DX, Intel386 SX, Intel486™ DX, Intel486
SX, Intel486 DX2 and Pentium processors
60/66/75/90/100/120/133/150/166/200.
The Pentium processor family currently includes the
following products.
• Pentium processor with MMX technology:
– Pentium processor with MMX technology at
233 MHz, iCOMP
®
Index 2.0 rating = 203
– Pentium processor with MMX technology at
200 MHz, iCOMP Index 2.0 rating = 182
– Pentium processor with MMX technology at
166 MHz, iCOMP Index 2.0 rating = 160
• Pentium processor 133/150/166/200. The name
"Pentium processor 133/150/166/200" will be
used in this document to refer to the Pentium
processor with 133, 150, 166 and 200 MHz
versions of the Pentium processor:
– Pentium processor at 200 MHz, iCOMP
Index 2.0 rating = 142
– Pentium processor at 166 MHz, iCOMP
Index 2.0 rating = 127
– Pentium processor at 150 MHz, iCOMP
Index 2.0 rating = 114
– Pentium processor at 133 MHz, iCOMP
Index 2.0 rating = 111
– Pentium processor at 120 MHz, iCOMP
Index 2.0 rating = 100
– Pentium processor at 100 MHz, iCOMP
Index 2.0 rating = 90
– Pentium processor at 90 MHz, iCOMP Index
2.0 rating = 81
– Pentium processor at 75 MHz, iCOMP Index
2.0 rating = 67
The Pentium processor family supports the features
of previous Intel Architecture processors, and
provides significant enhancements and additions
including the following:
• Superscalar Architecture
• Dynamic Branch Prediction
• Pipelined Floating-Point Unit
• Improved Instruction Execution Time
• Separate Code and Data Caches
• Writeback MESI Protocol in the Data Cache
• 64-Bit Data Bus
• Bus Cycle Pipelining
• Address Parity
• Internal Parity Checking
• Execution Tracing
• Performance Monitoring
• IEEE 1149.1 Boundary Scan
• System Management Mode
• Virtual Mode Extensions
• Dual processing support
• On-chip local APIC device
In addition to the features listed above, the Pentium
processor with MMX technology offers the following
enhancements over Pentium processor 133/150/
166/200:
• Support for Intel MMX technology
• Doubled code and data cache sizes to 16 KB
each
• Improved branch prediction
• Enhanced pipeline
• Deeper write buffers
The following features are supported by the Pentium
processor 133/150/166/200, but these features are
not supported by the Pentium processor with MMX
technology:
• Functional redundancy check and Lock Step
operation.
• Support for Intel 82498/82493 and 82497/82492
cache chipset products
• Split line accesses to the code cache