IBM System/370 145 Reference Summary page 157

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Ii
Bits
System
Control
Reset to 00 00 00 EO
Control Register 1
Reset to 00 00 00 00
Control Register 8
Reset to 00 00 00 00
Bits
Control Register 10
Control Register 11
Reset to C2 00 00 00
Control Register 15
Reset to 00
TranslatP
Control
External Interrupt Marks
Machme Check Extended Logout Pomter
200 Hex