IBM System/370 Operator's Reference Manual page 157

Status Byte
Source: Component Description SRL for each device
NOT USED DE DEVICE END
ATTN ATTENTION SM STATUS MO
CE CHANNEL END UC
UNIT CHECK
CUE CONTROL UNIT END UE UNIT EXCEPTION
BIT
DEVICE
0 I
2 3
<I 5 6
7
1403 BUSY CE DE
UC UE
2301 (2820)
SM CUE BUSY CE DE
UC
UE
2303
ATTN
SM CUE BUSY
CE DE
UC
UE
2305(2835) ATTN SM CUE
BUSY CE DE
UC UE
2319 SM CUE BUSY CE DE
UC UE
2400
SM CUE BUSY CE DE
UC
UE
2560 BUSY CE DE
UC UE
2596 BUSY CE DE
UC
UE
2701
ATTN
SM BUSY CE DE
UC
UE
2702
SM CUE BUSY CE DE
UC
,
..
2703 SM CUE
BUSY CE
DE
UC
I
UE
2821
BUSY
i
CE
DE
UC.! UE
3203
I
BUSY
I
CE
DE
UC
!
UE
3210
ATTN
i
SM BUSY CE DE
UC
UE
3211
!
BUSY CE DE
UC I UE
3215 ATTN
BUSY
I
CE
I
DE UC
I
UE
3270 ATTN SM
CUE
BUSY! CE
DE
UC
!
UE
3277 ATTN
I
BUSY
CE
I
DE
UC
i
3330
I
··SM
:
BUSY
CE I DE
UC
I
UE
3340
!
SM CUE
BUSY I CE DE
UC : UE
3410
I CUE
BUSY
i CE
I
DE UC
i
UE
3411
i
I CUE
BUSY
l
CE
I
DE
UC UE
3420(3803)
SM CUE
BUSY I CE
DE
UC j UE
3504
I
BUSY
I
CE
I
DE
UC
!
UE
3525
i
BUSY I CE I DE UC
~
UE
3540
I BUSY! CE
i
DE
UC
I
3704
ATTN
SM CUE
I
BUSY
i
CE
DE
UC
1
UE
3705
ATTN!
SM
CUE
i
BUSY
I
CE
i
DE UC ; UE
5203
I
i
BUSY: CE
DE
I
UC
UE
5213
ATTN!
SM
CUE
i
BUSY
I
CE : DE
I
UC
!
UE
5425 i
BUSY I CE DE
I
UC
i
UE
Page 5-1