Specifications

Data Structures
1.19 Unit Control Block (UCB)
UCB$Q_DEVDEPEND 80
UCB$Q_DEVDEPEND2 88
UCB$L_IOQFL* 96
UCB$L_IOQBL* 100
UCB$W_UNIT*UCB$W_CHARGE* 104
UCB$L_IRP 108
UCB$W_REFC*UCB$B_DIPLUCB$B_AMOD* 112
UCB$L_AMB* 116
UCB$L_STS 120
UCB$W_DEVSTSUCB$W_QLEN* 124
UCB$L_DUETIM* 128
UCB$L_OPCNT* 132
UCB$L_SVPN* 136
UCB$L_SVAPTE* 140
UCB$W_BOFFUCB$W_BCNT 144
UCB$B_ERTCNTUCB$B_ERTMAXUCB$W_ERRCNT 148
UCB$L_PDT* 152
UCB$L_DDT* 156
UCB$L_MEDIA_ID* 160
*A read-only field
1–86