STB6100_NI
nint = regs[STB6100_NI];
regs[STB6100_NI] = nint;
rc = stb6100_write_reg(state, STB6100_NI, regs[STB6100_NI]);
[STB6100_NI] = "NI",
[STB6100_NI] = { 0xff, 0x00 },