Editing And Cursor Control Logic, Block Diagram - Raytheon DIDS-400 Series Technical Manual

8a-COUNT REGISTER
(USED ONLY DURING STEP UP,
STEP DOWN, DELETE & INSERT)
FUNCTION
COMPLETE
INDIVIDUAL
FUNCTION
FLIP-FLOPS
INSERT
RESET CIRCUIT
INPUTS FROM
DELETE
R - - ERASE MSG
BUFFER REGISTE
f -
ERASE LINE
03 DECODES
STEP LEFT
STEP RIGHT
INPUTS FROM --i
~
STEP UP
KEYBOARD STEP DOWN
DIDS 68-516
ADVANCE LINE
CLOCK
FLIP-FLOPS
L.fA21.2 &A21.al
SAMPLE STROBE
CIRCUIT
. I
A40. 8 & A2. 8
r-
CHARACTER
ENTRY
REGISTER
OUTPUT DISPLAY
AI.8&
A20.8
1
LOGIC
DELAY LINE AND
DELAY-LINE
ELECTRONICS
(SEE NOTE 2)
RESET STEP-UP _ _ --.
FLIP-FLOP
INSERT AND 12-COUNT REGISTER
1 - - - _ -..
(USED ONLY FOR INSERT
AND STEP-UP FUNCTIONS)
...,
... ,
,
....
(SEE NOTE J)
I
I
I
j,~- - - - - - - - -
___ J
A4.8 &
A3.8
I
INPUT DISPLAY
LOGIC
NOTES:
I. DASHED LINE DENOTES DATA
PATH DURING INSERT FUNCTION
2.
CONTROL EXERTED AT INPUT
OR OUTPUT LOGIC DEPENDING UPON
FUNCTION BEING PERFORMED
Figure 4-17. Editing and Cursor Control Logic, Block Diagram
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