IBM System/360

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0
Operational Cut
Request In
Hold Out
Select Out
Select Jn
Address Out
Operational In
Address In
Command Out
Status In
Service In
Service Out
Bus Jn (9 lines)
Address 30
Bus Out (9 Lines)
Suppress Out
-system Reset-~.1.-------lnitial Selection---------io------- Data Transmission (Single Byte)------~