IBM System/370 145 Reference Summary page 133

Byte Bit CPU 08
0 Hard Stop Latch Register 14 Bit 0
1 Enable I-Cycle and ADR/ADJ
Ctrl and EXPLS
2 Enable Hardware Retry
0 3 Mode Full Recording Mode MS Single
ECC Errors
4
Full Recording Mode CS Single
ECC Errors
5
Threshold Mode CS Single
ECC Errors
6
Reserved
7
Reserved
RM811
1
0-7
Track and Sector Address -
CFDA Console File
KF031
2
0-7
LRUM Least Recently Used ADR/ADJ
Table Register
MT215
3
0-7 Match ADR/ADJ Table Reg Matches
Preaddress Asm
MT332
Byte Bit CFDR - 09
0-3
CF Data Register
KF014-017
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11.9