salvo-lite|le|pro-avr-3.2.4-a.exe is the main installer. Run it first. salvo-lite|le|pro-avr-3.2.4-d.zip is a complete set of new Salvo libraries for all supported compilers, and it addresses the problem mentioned in Service Bulletin SB-26. Source code for the Salvo context switcher is included in Pro distributions. Note: IAR Embedded Workbench v3.2 (with the v3.2 version of the compiler) was used to generate the Salvo libraries in salvo\lib\iaravr-3, and IAR EWAVR v4.10B was used to generate the Salvo libraries in salvo\lib\iaravr-4 . Salvo-pro-avr-3.2.4-e.zip contains a new context switcher file -- porticcatmega256.s -- for use with the ImageCraft ICCAVR compiler and megaAVRs that have over 128KB of program memory (e.g. the mega2560 and mega2561). This file should _only_ be used with such AVRs, and can be used in both source-code and library builds. Salvo-pro-avr-3.2.4-f.zip contains a new set of libraries for ICCAVR v7. These libraries were generated with ICCAVR v7.06A. If you are having problems with "undefined symbol popxgsetXXX" errors then you need to use these libraries. aek 2006/06/15