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2-4. Opcode Byte & Data bytes
2-4-1. OPcode
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OPcode Data1 Function
------ ------ --------------------------
0x4B Keycode A remote key pressed
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2-4-1. A remote key pressed (OPcode=0x4B)
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Data1 Key
------ -------------------------
0x00 key 'LEFT'
0x01 key 'RIGHT'
0x02 key 'UP'
0x03 key 'DOWN'
0x04 key 'ENTER'
0x05 key 'BUZZER'
0x06 key 'LOCK'
0x07 key 'MENU'
0x08 key 'REC'
0x09 key 'REV.PLAY'
0x0A key 'STOP'
0x0B key 'PLAY'
0x0C key 'PAUSE'
0x0D key 'SEARCH'
0x0E key 'COPY'
0x0F key 'DISPALY'
0x10 key 'SHUTTLE << x2"
0x11 key 'SHUTTLE << x4"
0x12 key 'SHUTTLE << x6"
0x13 key 'SHUTTLE << x8"
0x14 key 'SHUTTLE << x16"
0x15 key 'SHUTTLE << x32"
0x16 key 'SHUTTLE << x600"
0x17 key 'SHUTTLE >> x2"
0x18 key 'SHUTTLE >> x4"
0x19 key 'SHUTTLE >> x6"
0x1a key 'SHUTTLE >> x8"
0x1b key 'SHUTTLE >> x16"
0x1c key 'SHUTTLE >> x32"
0x1d key 'SHUTTLE >> x600"
0x1e key 'JOG<'
0x1f key 'JOG>'
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2-5. Checksum Byte
Checksum is computed as the sum of all previous byte(including the
length byte), then mask with 0x7f.
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