OpenSPARC is an open-source hardware project, started in December 2005, for CPUs implementing the SPARC instruction architecture. The initial contribution to the project was Sun Microsystems' register-transfer level (RTL) Verilog code for a full 64-bit, 32-thread microprocessor, the UltraSPARC T1 processor.

A modern, real (not "toy") design -- OpenSPARC can boot real off-the-shelf commercial operating systems (e.g.Solaris, Linux, FreeBSD). Use a real design for your study, research or to test for your VLSI design methodology innovations.

OpenSPARC T1 is the open source version of the UltraSPARC T1 processor, a multi-core, 64-bit multiprocessor. The UltraSPARC T1 processor with CoolThreads technology was the highest-throughput and most eco-responsible processor ever created when it became available in the UltraSPARC T1 system.

OpenSPARC T1/T2现在最大的价值是帮助学术圈中的研究者们快速搭建一个原型系统，并且能感受一下2002~2005年时的工业级代码长什么样子 —— 但也千万不要小看它。

This document describes the OpenSPARCTM T1 processor, which is the first chip multiprocessor that fully implements the SunTM Throughput Computing Initiative. This document is organized as described in the following paragraph.

OpenSPARC是一個開放原始碼（Open Source）專案，該專案於2005年12月由昇陽電腦所發起成立，成立之初先由該公司釋出UltraSPARC T1處理器在電路設計上的原始程式碼（Source Code），如此可以使軟硬體的開發設計者（及開發商）能更快速容易的取得該處理器的架構原理與 ...

Feb 25, 2003 · www.OpenSPARC.net OpenSPARC – Dec 2007 – Chicago 30 UltraSPARC T2 Overview • 8 SPARC cores, 8 threads each, 64 threads total • Shared 4MB L2, 8 banks, 16 way associative • Four dual-channel FBDIMM memory controllers • Full 8x9 crossbar connects cores to L2 banks / SIU and vice versa • SIU connects I/O to memory • T2+ removed 2

Abstract—OpenSPARC is an open source community based around hardware design and experimentation aids for the UltraSPARCTM T1 and T2 chip multi-threaded (CMT) microprocessors[1]. The UltraSPARCTM T2 processor is the industry's first "server on a chip", with 8 cores, 64 threads and on-chip networking and security.

This OpenSPARC T2 Core Microarchitecture Specification includes detailed functional descriptions of the OpenSPARC T2 SPARC core processor components. This manual also provides I/O signal list for each component.

Oct 30, 2008 · OpenSPARC is an open source community based around hardware design and experimentation aids for UltraSPARC Tl and T2 chip multi-threaded (CMT) microprocessors.