[inkyoto]

> Perhaps it didn't have atomics at that point? That would've killed it for that project.

That would have been PPC 601 and perhaps [entry level] 603 models. Motorola/IBM first released a single processor PPC, then they added support for multiprocessor systems which did have atomics – https://devblogs.microsoft.com/oldnewthing/20180814-00/?p=99...

Other than that, I immensely enjoyed hand writing PPC assembly – it is a very straightforward RISC design, the «rlwinm» / «rlwimi» instructions are fun – once you figure out how to use them.