GETRB Data Table (Continued)
Device
Address
Bits
4·7
9
A
B1
C
1
0
1
El
F
Device
Name
Not used
"
It
It
It
It
It
It
Tape unit
All
I/O
Bits
8-15
8
9
10
11
12
13
14
15
State
of
Bit
1
1
1
1
1
1
o
Definition
End
of
tape (EOT)
No
OA
E response
Select magnet active (drive running)
Cartridge
in
place
Erase active (either channel
0 or
1)
Source active (LED and erase coils OK)
File protect (do
not
write)
Beginning
of
tape (BOT)
Not used
1 Device has subdevice addressing capability. See
the
I/O microinstructions descriPtion under Microinstructions
in
this section.
C-12
',,-
/
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