80
Name Size Radix Description
SRQ
1 2 Interface DCPC service request flip-flop
EDT
1 2 End of data transfer flag
UCYL [0:9]
10 10 Current cylinder, drives 0-7, controller, and timer
UOP [0:9]
6 8 Current operation code, drives 0-7, controller, and timer
USTAT [0:9]
8 2 Unit status, drives 0-7, controller, and timer
UPHASE [0:9]
3 8 Current command state, drives 0-7, controller, and timer
UPOS [0:9]
32 8 Current byte position, drives 0-7, controller, and timer
UWAIT [0:9]
32 8 Scheduled wait delay, drives 0-7, controller, and timer
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