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Philips CD-i RC6 protocol, OR something else uses RC6-M-32!

 
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Knuckx



Joined: 15 Jul 2015
Posts: 61
Location: UK

PostPosted: Wed Sep 30, 2015 5:45 am    Post subject: Philips CD-i RC6 protocol, OR something else uses RC6-M-32! Reply with quote

The Philips Compact Disc Interactive (CD-i) is a old games console. It has support for an IR controller with an analog joystick on it, two buttons, and some transport controls. I have a CD-i 210/25, and wanted my URC7781 to be able to control my CD-i.

I found some old Pronto captures of the remote commands, and with some experimentation have reverse engineered the protocol, and succeeded in making the URC7781 operate my CD-i. The following information is for the RC6 based version of the CD-i protocol; apparently earlier CD-i models (like the CD-i 205/00) use a RC5 based protocol instead.

The gamepad controls (analog joystick + two buttons) use RC6-M-32, but in a strange way (using the subdevice for data), seemingly contradicting the protocol notes in RMIR of "This supports a family of potential protocols of which MCE is the only know example."

Due to the stangeness of the gamepad controls, I have implemented this on my remote as several device upgrades, along with a series of HEX keymoves, attaching these device upgrades to the transport device upgrade.

Device upgrades: http://www.hifi-remote.com/forums/dload.php?action=file&file_id=13579

Key moves (onto CD4000/transport upgrade):
Code:
Dev   Key#   Type   Code   Raw data   Hex   EFC-5
Dev2   20   CD   4001   8F A1 00 12   00   19159
Dev2   35   CD   4002   8F A2 00 12   00   19159
Dev2   33   CD   4003   8F A3 00 12   00   19159
Dev2   36   CD   4004   8F A4 94 6E   94   42667
Dev2   37   CD   4004   8F A4 14 72   14   43703
Dev2   38   CD   4007   8F A7 00 12   00   19159
Dev2   39   CD   4005   8F A5 00 12   00   19159
Dev2   21   CD   4008   8F A8 FF B5   FF   60784
Dev2   22   CD   4004   8F A4 FF B5   FF   60784
Dev2   23   CD   4006   8F A6 FF B5   FF   60784
Dev2   25   CD   4008   8F A8 00 12   00   19159
Dev2   26   CD   4001   8F A1 00 12   00   19159
Dev2   27   CD   4006   8F A6 00 12   00   19159
Dev2   28   CD   4008   8F A8 7F B9   7F   61820
Dev2   29   CD   4004   8F A4 7F B9   7F   61820
Dev2   30   CD   4006   8F A6 7F B9   7F   61820
Dev2   32   CD   4003   8F A3 00 12   00   19159
Dev2   31   CD   4001   8F A1 00 12   00   19159
Dev2   34   CD   4002   8F A2 00 12   00   19159


CD-i RC6 Transport Controls

RC6, Device=25

OBC/Hex: Key
16 / 0x10 = Vol Up
17 / 0x11 = Vol Down
32 / 0x20 = Next
33 / 0x21 = Previous
44 / 0x2C = Play
48 / 0x30 = Pause
49 / 0x31 = Stop
67 / 0x43 = CDi/TV


CD-i RC6 Gamepad Controls

RC6-2-32, Device=25, T-Bit=0

OBC/Hex: Analog Joystick Y Axis Position
0 / 0x00 = Centered (used)
1 / 0x01 = Down Min
127 / 0x7F = Down Max
128 / 0x80 = Centered (unused)
129 / 0x81 = Up Min
255 / 0xFF = Up Max

Subdevice as binary 100bapppppppp
a: Button I State
b: Button II State
p: Analog Joystick X Axis Position
No buttons pressed, centered X axis = 4096 / 0x1000 / b'1000000000000'

p: Analog Joystick X Axis Position
0 / 0x00 = Centered (used)
1 / 0x01 = Right Min
127 / 0x7F = Right Max
128 / 0x80 = Centered (unused)
129 / 0x81 = Left Min
255 / 0xFF = Left Max
_________________
In Use: 3x URC7781 / 2x Nevo C2 / Harmony PS3 -|- Learner: Nevo C2
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