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START
Init Hardware
Set Time Code
Init ACIA
Init Motion
Set to
Not Ready
CONTRL
RS-232
Char?
Yes
Warning?
Status
Safety Check
Douser
Keybd
Char?
Yes
Warning?
Indicate Fault
Set to
Not Ready
CHRISTIE INC. - 35/70 Service/PM Manual
CHRISTIE INC. -
July, 1997
Pulldown
not at
Cine Speed
Yes
RT1
No
No
Yes
No
No
Execute
Command
Figure 5.14: System Software Architecture
INTRPT
Shutter?
Yes
Yes
Do
CV Int
Pulldn?
Fwd?
No
Frame Cntr
Read Marks
Yes
Frame Cntr
CV Int
Read Marks
Rev?
No
60 Hz
RT1
Int?
No
RT1
5 : T h e o r y o f O p e r a t i o n
Yes
Do
Pulldn?
No
No
Pulldown at
Cine Speed
No
Yes
Change CV
Speed
Alarms
Timers
Keyboard
Yes
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