Appeal No. 1997-4217
Application No. 08/307,178
(7) when said second state occurs store the simulation
time at which said first simulator outputs changed as new
target timepoint (tt);
(8) when said third state occurs continue updating said
first simulator outputs stepwise at step (4) until said first
simulator current simulation time (ct ) equals said target
1
timepoint (tt);
(9) post said updated first simulator outputs and target
timepoint (tt) as new second simulator inputs to said second
simulator and store a state of said first simulator;
(10) begin execution of said second simulator program
using said second simulator inputs, with said verified
simulation time (vt) as a current simulation time (ct ) for
2
said second simulator;
(11) update said second simulator outputs by a second
step time (ªt ) not greater than said target timepoint (tt);
2
(12) define a fourth state, whereby said updated
second simulator outputs do not equal said second simulator
outputs;
(13) when said fourth state occurs,
a) store a simulation time at which the second
simulator outputs changed as a new target timepoint (tt),
b) post said changed second simulator outputs
and said new target timepoint as new first simulator inputs to
said first simulator,
c) back up said first simulator to said
verified simulation time (vt),
d) generate new values for said first
simulator outputs using said new first simulator inputs and
said new target timepoint as an ending time for the
simulation,
4
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