02-25
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/**********************************************************************/ /*Super Off Road Track Pak U85 (02-25 and 02-27) */ /*control signals for master video data latches */ /*also used for security */ /**********************************************************************/ /** Inputs **/ PIN 1 = i1; PIN 2 = i2; PIN 3 = i3; PIN 4 = i4; PIN 5 = i5; PIN 6 = i6; PIN 7 = i7; PIN 8 = i8; PIN 9 = i9; PIN 11 = i11; /** Outputs **/ PIN 12 = o12; PIN 13 = o13; PIN 14 = o14; PIN 15 = o15; PIN 16 = o16; PIN 17 = o17; PIN 18 = o18; PIN 19 = o19; /** Logic Equations **/ /* toggle latch with reset */ /* toggle on falling edge of o13, reset when i11 is low */ /* o18 and o13 are state (o13 is toggle output) */ o18 = !o13 & o14 & i11 # o18 & !o14 & i11; o13 = o13 & o14 & i11 # o18 & !o14 & i11; o12 = !i9 # i5 # !i4 # i2 # i1 # o18 & i11 & i8; o14 = !i9 # !i8 # i5 # !i4 # i1 # i3 & i2; o15 = !i8 # i5 # !i4 # i2 # i1 # !o18 & i9 # !i11 & i9; o16 = !i9 # i5 # !i4 # i3 # i1 # o18 & i11 & i8; o17 = !i8 # i5 # !i4 # i3 # i1 # !o18 & i9 # !i11 & i9; o19 = !i5 # i4 # i1 # i6 & i3 # !i6 & i2;