Welcome! Here lives gcc-t800, the port of GNU C Compiler to the transputer architecture. Naming conventions for files beneath this directory are as follows: gcc-2.x.x-t800.NNN.dif.gz is the transputer port in the form of context diff against the official GCC distribution, gcc-2.x.x.tar.gz. You most probably want to pick the file with largest NNN. gcc-2.x.x.tar.gz is the official GCC distribution, version 2.x.x. You can download it from here, but it is large. So you probably will be happier downloading it from the nearest to you FTP site that carries GNU software. patchNNN.gz contains diff between gcc-2.x.x-t800.MMM and gcc-2.x.x-t800.NNN, where MMM=NNN-1. This is meant for upgrades. changesNNN contain a short overview of the changes in version gcc-2.x.x-t800.NNN. gcc-2.7.2-t800.1 is roughly equivalent to gcc-2.6.3-t800.10 transputer-wise. The 2.6.3 branch is not expected to be developed further, except for bugfixes.