SCxTDR
sci_serial_out(port, SCxTDR, c);
(sci_getreg(port, SCxTDR)->offset << port->regshift);
[SCxTDR] = { 0x03, 8 },
[SCxTDR] = { 0x06, 8 },
[SCxTDR] = { 0x20, 8 },
[SCxTDR] = { 0x40, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x06, 8 },
[SCxTDR] = { 0x06, 8 },
[SCxTDR] = { 0x06, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x0c, 8 },
[SCxTDR] = { 0x20, 8 },
sci_serial_out(port, SCxTDR, c);