Instruction Set Reference
Picture of the die
The Pentium II is a glorified Pentium Pro with MMX extensions. The Pentium
II has a different package than the Pentium Pro. This new package is called
"Slot-1." Officially, Intel claimed technical reasons for needing Slot-1.
Industry pundits claimed that slot-1 was devised to thwart industry competition
with the Pentium Pro, and further the Intel monopoly. Strangely, the "technical
reasons for needing slot-1" evaporated as soon as the Pentium Pro was dead;
as Intel somehow made a "breakthrough" that they had previously claimed was
impossible (thereby "needing" to invent the proprietary slot-1).
Slot-1 was also promised to be the upgrade path for consumers -- leading
many years into the future. Unfortunately, every time Intel has made this
promise, first with the 80486, then with the Pentium, the promise has been
broken. As soon as Intel saturated the saturated the market with slot-1
computers, they announced the future high performance upgrade path would
The Pentium II can address up to 64 GB of main memory, but has cache limitations
preventing memory use above 512 MB.
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