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134
13-3 Speed/data correspondence table
Data Speed Data Speed Data Speed
00-1D STILL 80 1.00 B8 7.50
1E-2C 0.03 81 1.04 B9 7.80
2D-3A 0.07 82 1.07 BA 8.00
3B-44 0.10 83 1.11 BB 8.40
45-4B 0.13 84 1.15 BC 8.70
4C-50 0.17 85 1.20 BD 9.00
51-56 0.20 86 1.24 BE 9.30
57-59 0.23 87 1.30 BF 9.70
5A-5C 0.27 88 1.33 C0-C1 10.00
5B-60 0.30 89 1.38 C2 10.70
61 0.33 8A 1.43 C3-C4 11.10
62 0.34 8B 1.49 C5 11.50
63 035 8C 1.54 C6 12.40
64 0.37 8D 1.60 C7-C8 13.00
65 0.38 8E 1.65 C9-CA 14.00
66-68 0.40 8F 1.72 CB-CC 15.00
69 0.44 90 1.78 CD 16.00
6A 0.45 91 1.84 CE-CF 17.00
6B 0.47 92-94 2.00 D0-D1 18.00
6C-6E 0.50 95 2.13 D2 19.00
6F 0.54 96 2.21 D3 20.00
70 0.56 97 2.29 D4-D5 21.00
71 0.58 98 2.37 D6 22.00
72 0.60 99 2.46 D7 23.00
73 0.63 9A 2.55 D8 24.00
74 0.65 9B 2.64 D9 25.00
75 0.67 9C 2.74 DA-DB 26.00
76 0.70 9D 2.84 DC 27.00
77 0.72 9E-A0 3.00 DD 28.00
78 0.75 A1 3.30 DE 29.00
79 0.78 A2 3.40 DF 31.00
7A 0.80 A3 3.50 E0 32.00
7B 0.84 A4 3.70 E1 33.00
7C 0.87 A5 3.80 E2 34.00
7D 0.90 A6-A8 4.00 E3 35.00
7E 0.93 A9 4.40 E4 37.00
7F 0.97 AA 4.50 E5 38.00
AB 4.70 E6 39.00
AC-AE 5.00 E7 41.00
AF 5.40 E8 42.00
B0 5.60 E9 44.00
B1 5.80 EA 45.00
B2 6.00 EB 47.00
B3 6.30 EC 49.00
B4 6.50 ED 50.00
B5 6.70 EE 52.00
B6 7.00 EF 54.00
B7 7.20 F0 56.00
F1-FF 58.00
13 RS-232C protocol
135
13-4 Contents of the sense commands
The bit assignment for each status data byte returned
with D7: Status Sense is as follows:
Status (No. 1): First byte
Bit Status Remarks
Bit-7 Undefined Always “1”
Bit-6 Undefined Always “0”
Bit-5 Short FF/REW Short FF: Detects the beginning
of the tape and fast-forwards
the tape until Stand-By On is
engaged.
Short REW: Detects tape end
and rewinds the tape until
Stand-By On is engaged.
Bit-4 REC Inhibit Indicates that a cassette with
no safety tab has been loaded
or that recording prohibition
has been selected with the
VCR’s memory switch.
Bit-3 Cassette Out No tape is loaded in the VCR.
Bit-2 Servo Lock During tape playback, both the
capstan and drum servo are
locked.
Bit-1 Undefined Always “0”
Bit-0 Error Shows that an invalid command
has been received. In this status,
a continuously transmitted
command will not be accepted.
To release the Error mode,
cancel the commands one byte
at a time with 41: Error Clear. Or
cancel all commands with 56:
Clear.
Status (No. 2) Second byte
Bit Status Remarks
Bit-7 EE Externally input video signals
are output.
Bit-6 A1 EE Mode Externally input audio (A1)
signals are output.
Bit-5 Video Mute Video signals are muted
(returned from the DS micro-
processor).
Bit-4 Audio Mute Audio signals are muted
(returned from the AUDIO
microprocessor.).
Bit-3 Warning Shows that the VCR is in the
Auto-Off mode.
0
SPD 0.03
SPD 0.1
SPD 0.2
SPD0.5
SPD 1.0
SPD 2.0
SPD 4.0
SPD 6.0
SPD 10
SPD 17
SPD 32
SPD
0.03
0.1
0.2
0.5
1.0
2.0
4.0
6.0
10
17
32
Speed Code-3 0 00000001111
Speed Code-2 0 00011110000
Speed Code-1 0 01100110011
Speed Code-0 0 10101010101
Bit-2 DEW Condensation.
Bit-1 Tape Begin The tape winding start sensor
is detected.
Bit-0 Tape End The tape winding end sensor
is detected.
Status (No. 3) Third byte
Bit Status Remarks
Bit-7 Unused Always “0”
Bit-8 Unused Always “0”
Bit-6 Unused Always “0”
Bit-5 Unused Always “0”
Bit-4 Unused Always “0”
Bit-3 Unused Always “0”
Bit-2 Unused Always “0”
Bit-1 Search mode During CueUp/Preroll (only
when controlled from the RS-
232C)
Bit-0 Unused Always “0”
Status (No. 4) Forth byte
Bit Status Remarks
Bit-7 Play Mode Playback
Bit-6 FF Mode Fast-forward
Bit-5 REW mode Rewind
Bit-4 Stop mode Stop
Bit-3 Stand-by mode Standby-Off
Bit-2 Eject Tape is ejected
Bit-1 REC mode Record
Bit-0 Unused Always “0”
Status (No. 5) Fifth byte
Bit Status Remarks
Bit-7 Pause mode Pause
Bit-6 Unused Always “0”
Bit-5 Shuttle Fwd During Shuttle/Jog/Variable
search in the forward direction
Bit-4 Shuttle Rev During Shuttle/Jog/Variable
search in the reverse direction
Bit-3 Speed Code-3 Refer to the table below.
Bit-2 Speed Code-2 Refer to the table below.
Bit-1 Speed Code-1 Refer to the table below.
Bit-0 Speed Code-0 Refer to the table below.
13 RS-232C protocol