The 3.15.0.x releases of EPICS Base are not meant for operational use, they provide an introduction to the operational releases which will start numbering at 3.15.1. External modules written for Base 3.14.12 may not build successfully against 3.15.0.x versions without some changes.
The following documents cover EPICS Base versions 220.127.116.11 and 18.104.22.168. Additional documentation may be found in the documentation subdirectory of the distribution source code.
NOTE: These documents may be revised at any time without generation of a new source release. The Known Problems page may be updated if any serious bugs are discovered, but the core-talk and tech-talk mailing lists are probably a better source of information in the 3.15.0 series.
All versions of EPICS Base are available to the public under an open source license. Development versions can be acquired using Bazaar. The size of the download files can be seen on the Base Download page. The compressed tar files linked below contain source code only (no binaries).