Genie tests:  use POSIX
[NEW] v68k-tests:  v68k test umbrella project
v68k:  Add d() and a() accessors
v68k:  Use d() and a() accessors
v68k/t:  Use d() and a() accessors
Merge branch 'v68k-general-register-accessors'
v68k:  Actually write control registers in MOVEC