Raytheon DIDS-400 Series Technical Manual page 32

DIDS-40l-lAM13
Table 1-4. Glossary of Terms (Cont)
Mnemonic Word
or Symbol
RE
SDL
SG1l
SGl3
STX
T
V DRIVE
VT
Meaning
Receive Enable
Shift (to or from)
Delay Line
Shift Gate
One-to-Two
Shift Gate
Two-to-Three
Not Stop
Not Start
Start-of- Text
Transmit
Vertical Drive
Vertical Tab
1-19
Definition
A decode output which goes
high when certain characters
(STX and DA) are recognized
by the start of text and
address decodes
A flip-flop that is set to enable
a serial data transfer to
(receive) or from (transmit)
the delay line
A flip-flop that is set to enable
a serial data transfer from
buffer register Dl to buffer
register Dl_
A flip-flop that is set to enable a
serial data transfer from
buffer register Dl to buffer
register D3
A negative going pulse that is
in coincidence with the stop
bit of each lO-bit asynchron-
ous character
A negative going pulse that is
in coincidence with the start
bit of each 10-bit asynchronous
character.
First character of any message
During transmit, T goe s high
to enable the transmit
steering logic
Pulses used to develop a
sweep signal for moving the
CRT beam downward
(vertical sweep)
An ASCII control code which
steps the cursor down to
the next line