HSERIN-HSEROUT
can anyone explain me the usage of these commands?
i know they are for hardware USART
i know HSERIN [buffer] writes incoming data to the buffer variable
i know HSEROUT [buffer] send buffer variable from serial connection
but i dont know what is that 10, 13...?
Hserout ["byteValue: ", DEC byteIn, 10, 13]
Hserout ["USART Overrun", 13, 10]

there is noting useful about this in the help file of microcode studio and other sources.only these 2 lines
HSERIN {ParityLabel,}{Timeout,Label,}[Item{,...}]
HSEROUT [Item {,Item...}]