Read
Write, Auto
Read
3504,3505 CARD
Command Binary Hex Bit Meanings
Read
Diagnostic Read
Read, Feed,
Write
1 Formatted
3504,
0 Data Mode
Write
Write, Feed,
Print Line* LLLL
*Special feature on 3525. tSpecial feature.
After Write Immed
Write without spacing
See
Density Parity
13
Read Forward
Read Backward
Sense Release**
53
Request Track-in-Error
Loop Write-to-Read* * 8B
63
Erase Gap 17
odd off { off B3
Write Tape Mark 1F
Backspace Block 27
even off { off
A3
Backspace File 2F on AB
Forward
Forward
Recalibrate 13 Nonzero
Restore (executes as a no-op) 17 Nonzero
Vary
Diagnostic Load (a) 53 1
Diagnostic Write (a) 73 512
Key Equal 29 A9 KL
Key High 49
Key Equal or High 69 E9 KL
Key and Data Equal (d)
Key and Data Eq. or Hi (d)
in search
argument
No
Record
}
Number
Data
of bytes
Key and Data
to be
transferred
Sector (a,f) 22 1
Sense
Read, Reset Buffered Log (b) A4 24
Read Buffered Log (c) 24 128
Device Release (e) 94 24 (a); 6 (d)
Device Reserve (e) B4 24 (a); 6 (d)
Read Diagnostic
Write Home Address 19
Record
Data
Key and Data
* Code same as MT
International Business Machines Corporation
Data Processing Division
1133 Westchester Avenue, White Plains,
360 Hamilton Avenue, White Plains,