The coreboot docs claim that modern AMD parts no longer support cache-as-RAM.
Wow, thanks for the link, I had no idea:
> AMD has ported early AGESA features to the PSP, which now discovers, enables and trains DRAM. Unlike any other x86 device in coreboot, a Picasso system has DRAM online prior to the first instruction fetch.
Perhaps they saw badly trained RAM as a security flaw? Or maybe doing it with the coprocessor helped them distribute the training code more easily (I heard a rumour once that RAM training algos are heavily patented? Might have imagined it).
The best I have in my country (Australia) are SIP providers. They generally only offer landline numbers; I think some might offer mobile numbers but I have not tried those services (they cost more and I suspect texting won't work anyway).
Nonetheless some simple self-hosted SIP-XMPP bridge software would be amazing. We'd also need XMPP clients that understand this, however, otherwise using existing tel://xxx address books would be fiddly (you would have to manually retype them to be an XMPP address).
N.B. SIP clients on phones seem to be a bit slow and unreliable. I use one daily nonetheless, along with Snikket (conversations), which also has its fair share of issues on different people's phones.