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TI Releases OS 4.2 for the TI-84 Plus C Silver Edition
Published by KermMartian on March 5, 2014 at 12:01:58 AM CST | Discuss this article (11)

In November 2012, Cemetech discovered the first information about the TI-84 Plus C Silver Edition. The calculator was officially released in 2013; Cemetech received one of the first devices manufactured courtesy of TI for a hands-on review. Thirteen months later, the calculator continues to be extremely popular, with programs and games for the color calculator stuck at the top of ticalc.org's weekly list of most-downloaded programs. Unfortunately, as with any brand-new piece of software, the first OS for the TI-84 Plus C Silver Edition contained a number of mostly minor bugs. We carefully tracked and tabulated a "Big Bad Bundle" of bugs, and we found TI very receptive to what we found. Unfortunately, as of T^3 2013, it was not clear what sort of success the TI-84 Plus C Silver Edition would become, so it was unsurprising that no OS upgrade was immediately forthcoming.

TI-OS 4.2 for the TI-84 Plus C Silver Edition has now been released, and can be downloaded at the link below. On the plus side, it appears at least as stable at OS 4.0, and in testing performed by Cemetech administrators, all existing programs, utilities, shells, and games continue to work. TI-BASIC and z80 Assembly programming features remain unhindered. On the other side of the coin, it appears none of the bugs we have collected thus far has been fixed, so we did a bit of digging to determine what this new upgrade offers. Based on information posted on TI-Planet and at Omnimaga, as well as digging from the inimitable Brandon Wilson, we believe that this new OS version works hand-in-hand with the new version of TestGuard linked below to further guarantee that TestGuarded calculators are running authentic TI-released operating systems. While we suspect the changes are intended to detect modified OSes, time will tell whether this is in fact the case. We look forward to a long future for the TI-84 Plus C Silver Edition as a tool for math and programming, and we hope to see more TI-OS 4.x versions in the future with a steady stream of new features and bugfixes.

Download
TI-84 Plus C Silver Edition OS 4.2
TI-Testguard 4.2 for the TI-84 Plus C Silver Edition

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