IBM System/360

External
External signal 7
00000000 uuuuuuul
External signal 6
00000000 uuuuuulu
External signal 5
00000000 uuuuuluu
External signal 4
00000000
uuuuluuu
External signal 3 00000000 uuuluuuu
External signal 2
00000000 uuluuuuu
INTERRUPT pushbutton
00000000 uluuuuuu
Timer
uuuouuoo lUUUUUUU
I/O
Multiplexor channel
00000000 aaaaaaaa
Selector chaµnel 1 00000001
aaaaaaaa
Selector channel 2
00000010 aaaaaaaa
Selector channel 3
00000011 aaaaaaaa
Selector channel 4
00000100
aaaaaaaa
Selector channel 5 00000101 aaaaaaaa
Selector channel 6 00000110
aaaaaaaa
NOTES: u: Unpredictable
r: Rl and R2 fields of Supervisor Call instruction
a: I/O device address
7
u
Completed
7 u Completed
7
u
Completed
7 u Completed
7
u
Completed
7 u Completed
7
u
Completed
7
"
,...,, - ·~· ,~ 1 ~"- - ..l
VVlll}-'Ltl.C::U
0 u Completed
1 u Completed
2 u Completed
3
u Completed
4 u Completed
5
u
Completed
6 u Completed