October 31st, 2012 ~ by admin

Cyrix Joshua Processor – From Peppers to the Bible

Cyrix Joshua Sample

Perhaps one of the most confusing, and misreported processor stories is that of the Cyrix Joshua processor.  More correctly known as the VIA Cyrix III Joshua.  Cyrix began sampling this successor to the MII in 1999, a tumultuous time in Cyrix’s history, as they were in the midst of being sold to VIA by National Semiconductor.  The Joshua never made it into full production, being quickly killed off by the Centaur designed Samuel core. Centaur was the processor division of IDT which produced the Winchip series, bought by VIA only a month after their purchase of Cyrix.

Adding to the confusion was Cyrix bountiful use of code names for its upcoming products, with many seeming to overlap, change or be redundant.  Understanding the methodology of their naming will greatly increase ones understanding of the products.  Cyrix used a code name for the core of a processor, as well as a separate name for what application that core was going to be used in.  Just like Intel used the P6 core for the PII, Celeron, and Xeon, Cyrix intended its cores to be able to be used in several products.

In the late 1990’s Cyrix had two new cores under development.  The first was the Cayenne, an evolution of the 6x86MX/MII processor.  The Cayenne was essentially an MII, with a dual (rather then single) issue FPU, support for 3DNow! instructions, and perhaps most importantly, a 256K 8-way associative on-die L2 cache.  It retained the 7 stage pipeline of the MII, the 256 byte scratch pad L0 cache, an almost identical X-Y integer unit and the same 64K L1 cache.  Cyrix had had industry leading integer performance, but always lagged in the area of FPU performance.  The dual issue FPU was their attempt to help remedy this.  However, FPU intensive benchmarks, such as Quake 3, showed the Cayenne core to be about half as fast as a Celeron of equal rating (500MHz vs PR500 Cyrix).  Business apps, heavy in integer and light on floating point, showed the integer strength of the Cyrix, with a 400MHz Cyrix matching a 500MHz Celeron.

The Cayenne core was slated to be used in at least 3 different products.  The first was the MXi, this was the successor to the MediaGX and thus would be highly integrated, including a PCI Bus controller, SDRAM controller, MPEG/DVD acceleration, 2D/3D Graphics as well as audio capabilities. The Jedi was to be a socket 7 (Super 7 really) compatible processor based on the Cayenne core.  This was canceled in 1999 (nothing to do with potential lawsuits from Lucas Films as often was rumored).  The third use of the Cayenne core was the Gobi, this was to be a Socket 370 compatible processor and it is this version that was widely sampled, and benchmarked, by many hardware review sites, magazines, etc.  When VIA purchased Cyrix on June 30, 1999 the Gobi project was allowed to continue, MXi, and other projects were quickly shut down.  The Gobi codename did not fit with VIAs core naming scheme however, thus is was renamed.

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January 6th, 2011 ~ by admin

The day has come, ARM + Microsoft Windows

Over a year ago we wrote about the need for native support of ARM cored processors by Windows (and not just Windows mobile).  Yesterday at the CES Microsoft officially announced it will be supporting ARM processors as well as ARM SoC’s in Windows 8, and demo’d several such systems.  This is very important to the landscape of processors.  Obviously software support will be initially lacking but this brings much needed competition to the PC market.

Intel and AMD have been competing with each other, and each other alone (with a few exceptions) for almost 10 years now. Bringing full fledged Windows to a new architecture is not unprecedented.  Windows NT 4 ran on x86, MIPS, PowerPC as well as the Digital Alpha.

Nvidia, already very talented in the GPU market, has been working on ARM processors for a couple years now with its Tegra line, so its not surprising that they have also announced development of a ARM based processor/GPU targeted for the desktop known as Project Denver.

VIA is also adding some more competition with the release of their first dual core processor, the Nano X2, based on the Isaiah architecture.  While not known for brute force, the Nano is known for its low heat and power sipping capabilities.

2011 is off to a great start and we look forward to seeing many new processors released, as well as old processors added to the museum