Specifications

Data Structures
1.19 Unit Control Block (UCB)
Table 1–26 (Cont.) UCB Terminal Extension
Field Name Contents
TTY$V_ST_REFRSH Refresh
TTY$V_ST_ESCAPE Escape mode
TTY$V_ST_TYPFUL Type-ahead buffer full
TTY$V_ST_SKIPLF Skip line feed
TTY$V_ST_ESC_O Output escape
TTY$V_ST_WRAP Wrap enable
TTY$V_ST_OVRFLO Overflow condition
TTY$V_ST_AUTOP Autobaud pending
TTY$V_ST_CTRLR Clock prompt and data string from read
buffer
TTY$V_ST_SKIPCRLF Skip line feed following a carriage return
TTY$V_ST_EDITING Editing operation
TTY$V_ST_TABEXPAND Expand tab characters
TTY$V_ST_QUOTING Quote character
TTY$V_ST_OVERSTRIKE Overstrike mode
TTY$V_ST_TERMNORM Standard terminator mask
TTY$V_ST_ECHAES Alternate echo string
TTY$V_ST_PRE Pre-type-ahead mode
TTY$V_ST_NINTMULTI Noninterrupt multi-echo mode
TTY$V_ST_RECONNECT Reconnect operation
TTY$V_ST_CTSLOW Clear-to-send low
TTY$V_ST_TABRIGHT Check for tabs to the right of the current
position
UCB$L_TT_LOGUCB* Address of logical UCB, if the redirect bit is set (DEV$V_RED in UCB$L_
DEVCHAR2). If this UCB describes the logical UCB, the contents of
UCB$L_TT_LOGUCB are zero.
UCB$L_TT_DECHAR* First longword of default device characteristics.
UCB$L_TT_DECHA1* Second longword of default device characteristics.
UCB$L_TT_DECHA2* Third longword of default device characteristics.
UCB$L_TT_DECHA3* Fourth longword of default device characteristics.
UCB$L_TT_WFLINK* Write queue forward link.
UCB$L_TT_WBLINK* Write queue backward link.
UCB$L_TT_WRTBUF* Current write buffer block.
UCB$L_TT_MULTI* Address of current multi-echo buffer.
UCB$W_TT_MULTILEN* Length of multi-echo string to be written.
UCB$W_TT_SMLTLEN* Saved length of multi-echo string.
UCB$L_TT_SMLT* Saved address of multi-echo buffer.
UCB$W_TT_DESPEE* Default speed.
UCB$B_TT_DECRF* Default carriage-return fill.
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