Appeal No. 1996-1097
Application 08/058,110
corresponding sets of registers, so a single program routine
controls both ignition coil banks 14. The first time
through the program routine block 112 the offset is zero
(block 110) and the second time through the program routine
block 112 the offset is six (block 116). The single routine
requires less space in ROM than the two routines of the
prior art.
Claim 1 is reproduced below.
1. In an automotive ignition system having a
plurality of ignition coil banks, each bank having at
least one ignition coil for energizing a corresponding
spark plug, an ignition control system comprising:
a plurality of input/output (I/O) devices for
relaying ignition coil signals, each I/O device in
electrical communication with one of the plurality of
ignition coil banks, the banks having at least one set
of corresponding I/O devices relaying similar ignition
coil signals;
first storage means for storing the similar
signals relayed by sets of corresponding I/O devices,
the similar signals having addresses in the first
storage means with a constant offset from each other;
second storage means for storing a plurality of
program routines, each routine for processing and
generating the similar signals relayed by sets of
corresponding I/O devices; and
accessing means for accessing the similar signals
in the first storage means via the program routines in
the second storage means using an indexed addressing
mode and the constant address offset such that a single
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