<JLIP technical information> jlip

Content of return data for each command
Return data for a command is like this sytle below.
They are used in 11 bytes included ID number of controlled device and check sum data.
Return data that are shown as 'xx' and other data in the table are specified in the 
explanation below.
 
return data 1st 2nd 3rd 4th 5th 6th 7th 8th 9th 10th 11th
general return 0xfc 0xff (ID) xx xx xx xx xx xx xx (sum)
 
Below is the explanation of important part of return data for making software.
It should be ignored some part of return data(byte or bit) that is not explained here.

Return data of Power mode request command
<5th data>  Power mode
D0 = 1 : Power ON, D0 = 0 : Power OFF

Standard VTU return data (VTU : Video Tuner)
[5th data] Band infomation
0x30 : Air(terrestrilal broadcast) 0x40 : BS(broadcast satellite)

[6th,7th,8th data] channel number
6th = 0x51 : real channel
channel number = (7th)x100+(8th)
6th = 0x53 : preset channel
channel number(non bank) = (7th)x100+(8th)
channel number(by bank) = 8th , bank number (1 to 10)  = (7th)-100

Standard VTR return data (VTR = VCR : video cassette recorder)
[5th data] VCR mode
D5 = 1 : Rec inhibited , D5 = 0 : Recordable
D4 = 1 : No tape , D4 = 0 : Tape inserted
D3, D2, D1, D0 : VTR mode
0000b = Eject , 0001b = Stop , 0010b = FF(fast forward) , 0011b = REW (rewind),
0101b = Pause , 0110b = Play forward , 0111b = Play backward ,
1101b = Record pause , 1110b = Record , 1111b = no mode

[6th data] Counter information
D2 = 1 : 25frm/s , D2 = 0 : 30frm/s
D0 = 1 : drop frame mode , D0 = 0 : non drop frame mode

[7th, 8th, 9th, 10th data] counter value
7th : hour , 8th : minute , 9th : second , 10th : frame
D6 of 8th = 1 : minus , D6 of 8th = 0 : plus

Return data of Playback speed request command
[5th data] playback speed mode
0x6d : Pause , 0x75 : Standard play speed , 0x7f : Not playback mode ,
0x77 : Playback forward at indicated speed,(*1)(*2)
0x67 : Playback backward at indicated speed
*1 : playback speed = (6th)x128 + (7th) + (8th)/n
(n = 120 (NTSC) , 100 (PAL, SECAM))
*2 : This value is not quite precise. So it should be used as such.

Return data of Input source request command
[6th data](= [7th data]) input source
0x3d : AUX1(F-1), 0x3e : AUX2(L-1), 0x3f : AUX3(L-2), 0x3c : iLINK
0x10 : Air, CATV , 0x15: BS


(2003/08/17 : document corrected)

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