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Update part6.md
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Justanhy authored May 10, 2021
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layout: CS132
title: Processor Architecture
part: true
math: true
pre: part5
---

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This sparked a split in industry, where **ARM** is the main proponent for RISC – their approach was to reduce the set of instructions but retain efficiency and synergy between control signal and control steps, sacrificing backwards compatibility.

**Intel** took a different approach and serves a market which wants backwards compatibility. They took a hybrid approach where the simplest and most commonly used instructions are executed by a RISC core and the more complex ones are **microprogrammed** (CISC). Performance is competitive and legacy software can still run.
**Intel** took a different approach and serves a market which wants backwards compatibility. They took a hybrid approach where the simplest and most commonly used instructions are executed by a RISC core and the more complex ones are **microprogrammed** (CISC). Performance is competitive and legacy software can still run.

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