Installing System/370 Personality; Installing System/ 3 7 0 Personality - IBM AT/370 Manual To Operations

Installing System/370 Personality
1
Make sure there is no diskette in drive A. Also,
be sure the system unit Power switch is set to
Off before you proceed.
System Unit
Power Switch
2
Power on all externally attached devices.
3
Set the system unit Power switch to On.
AT/370 System Setup 3-5