WritePIO
WritePIO(addr, 2, value);
WritePIO(addr, 4, value);
WritePIO(addr, 1, value);
void WritePIO(uint32 addr, uint8 numBytes, uint32 value);
inline void WritePIO_8(uint32 addr, uint8 value) { WritePIO(addr, 1, value); }
if (fChannel->WritePIO(fPacket, sizeof(fPacket)) != B_OK) {
status_t WritePIO(uint8 *buffer, size_t length);