ABC80/max80_fw

réplica de https://git.zytor.com/abc80/max80/fw.git/

Autor	SHA1 Mensaxe	Data
H. Peter Anvin	92d18543b8 tty: don't require DTR#; v2: output some clocks on gpio[135]	%!s(int64=3) %!d(string=hai) anos
H. Peter Anvin	60be2e1201 v2: v2 has a 16 MHz oscillator instead of 48 MHz	%!s(int64=3) %!d(string=hai) anos
H. Peter Anvin	81633591fa v2: abc_host and abc_a_oe are redundant and unified in v2	%!s(int64=3) %!d(string=hai) anos
H. Peter Anvin	6db45e74e6 WIP: build both v1 and v2	%!s(int64=3) %!d(string=hai) anos