Set control character output mode
Operand: 0x6c
data: 0: control character 0x01~0x1F send in characters(default)
2: control character 0x01~0x1F send with function key
mode 0:
mode 2:
Screen scanning settings
operand:0x6d
data: 0: normal mode(default)
1:screen scanning mode
Multiple key switch settings(some models)
operand:0x6e
data:0:shield multiple key functions(default)