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- 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.
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- Return data of Power mode request command
- <5th data> Power mode
- D0 = 1 : Power ON, D0 = 0 : Power OFF
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- Standard VTU return data (VTU : Video Tuner)
- [5th data] Band infomation
- 0x30 : Air(terrestrilal broadcast) 0x40 : BS(broadcast satellite)
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- [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
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- 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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