IBM System/370 145 Operating Procedures Manual

Also see for System/370 145: Guide Operating procedures Reference Summary

POWER-ON PROCEDURES• Power-On procedure depends upon the features installed.The following procedures may be used:No Features Installed1 Press the POWER-ON key.Pressing the POWER-ON key initiates a power-on sequencefor the CPU and on-line I/O units. The key turns red whenpressed and turns white when the power-on sequence is complete.B §B!]~oc:::::J O&J00e~~~O~O~~~000~O e~oo~o~~~OOOOOO~~e~~~*~6~~O~~ ~~~~~o056606~666o BE] ~ El E1GNote:~~The time required for a power-on sequence is determinedby the number and type of I/O units on-line. The contents ofstorage is not valid after a power-on sequence. Also, an IMPLoperation is required. (The IMPL is automatic if the rotaryswitches are in their normal processing positions, the ADDRESSCOMPARE CONTROL switch is set to SYNC/NORM, and the*370 microprogram disk is mounted on the console file).IOperating Procedures 41