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THEORY OF OPERATION
MODEL 1793/6423
( Power On ^
or IFC
)
TALK
ONLY MODE
OUTPUT DATA TO
488 BUS
AM I
ADDRESSED
7
DELAY, SET BY
SWITCH SETTING
WAIT FOR NEW
READING FROM
INSTRUMENT
WHICH
ADDRESS
7
NON-TRIGGER
TRIGGER
WAS I
IN TRIGGER
MODE
7
GET A NEW
READING
ALREADY
IN TRIGGER
MODE
7
GET A NEW
READING
HAS THE
PRESENT RDG
BEEN OUTPUTED
YET
GET r NEW
REAPINGS
l.Rsec
TRIGGER
PERIOD
7
GET A NEW
READING
AOOns
GET A NEW
READING
INTERRUPT
HO n A-n
ACCEPT THE
ADDRESS EROIl
THE CONTROLLER
SECONDARY
ADDRESS
OUTPUT THE
I'EUEST READING
nu THE "88 PUS
UHICI
ADDRES
DRiriARY
ADDRES
FT FLAGS
DEPENDING ON
ADDRESS
SET FLAGS,
lUnp TO TEST
ADORE
Interrupts are generated by the
controller sending out an
address.
4-2
FIGURE 4-1. 1793/6423 Flow Diagrain
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