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+# nand gate truth table
+# vim:ft=cfg
+LO: INPUT_LOW;
+HI: INPUT_HIGH;
+
+LO_LO: PROBE;
+LO_HI: PROBE;
+HI_LO: PROBE;
+HI_HI: PROBE;
+
+GATE1: NAND;
+GATE2: NAND;
+GATE3: NAND;
+GATE4: NAND;
+
+LO: GATE1,GATE1,GATE2,GATE3;
+HI: GATE2,GATE3,GATE4,GATE4;
+
+GATE1: LO_LO;
+GATE2: LO_HI;
+GATE3: HI_LO;
+GATE4: HI_HI;