{ "schema": "digital-logic-sim-web/1", "storageId": "simple-alu", "name": "Simple 1-bit ALU", "createdAt": "2026-08-09T21:55:31.787Z", "updatedAt": "2026-08-10T02:32:19.267Z", "root": { "id": "root", "name": "Simple ALU", "type": "custom", "kind": "custom", "size": { "x": 640, "y": 440 }, "colour": "#202b3a", "nameLocation": "top", "inputPins": [], "outputPins": [], "instances": [ { "id": "in-a", "name": "IN-1", "position": { "x": -960, "y": -240 }, "rotation": 0, "label": "A", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "in-b", "name": "IN-1", "position": { "x": -960, "y": -120 }, "rotation": 0, "label": "B", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "in-cin", "name": "IN-1", "position": { "x": -960, "y": 0 }, "rotation": 0, "label": "CIN", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "in-op0", "name": "IN-1", "position": { "x": -960, "y": 120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "in-op1", "name": "IN-1", "position": { "x": -960, "y": 240 }, "rotation": 0, "label": "OP1", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "not-op0", "name": "NOT", "position": { "x": -800, "y": -60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "not-op1", "name": "NOT", "position": { "x": -800, "y": 60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "and-ab", "name": "AND", "position": { "x": -640, "y": -120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "or-ab", "name": "OR", "position": { "x": -640, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "xor-ab", "name": "XOR", "position": { "x": -640, "y": 120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "sum", "name": "XOR", "position": { "x": -320, "y": 120 }, "rotation": 0, "label": "ADD SUM", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "carry-and-ab", "name": "AND", "position": { "x": -320, "y": -120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "carry-and-cin", "name": "AND", "position": { "x": -320, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "carry-or", "name": "OR", "position": { "x": 0, "y": 0 }, "rotation": 0, "label": "CARRY", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "select-00", "name": "AND", "position": { "x": -480, "y": -60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "select-01", "name": "AND", "position": { "x": -160, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "select-10", "name": "AND", "position": { "x": 160, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "select-11", "name": "AND", "position": { "x": 320, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "term-and", "name": "AND", "position": { "x": 480, "y": -180 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "term-or", "name": "AND", "position": { "x": 480, "y": -60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "term-xor", "name": "AND", "position": { "x": 480, "y": 60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "term-add", "name": "AND", "position": { "x": 480, "y": 180 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "result-or-01", "name": "OR", "position": { "x": 640, "y": -120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "result-or-23", "name": "OR", "position": { "x": 640, "y": 0 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "result-or", "name": "OR", "position": { "x": 800, "y": 0 }, "rotation": 0, "label": "RESULT", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "carry-select", "name": "AND", "position": { "x": 640, "y": 120 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "out-result", "name": "OUT-1", "position": { "x": 960, "y": -60 }, "rotation": 0, "label": "RESULT", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "out-carry", "name": "OUT-1", "position": { "x": 960, "y": 60 }, "rotation": 0, "label": "CARRY", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} }, { "id": "element-1fd71706", "name": "CLOCK", "position": { "x": -480, "y": 60 }, "rotation": 0, "label": "", "internalData": {}, "linkedBusPairId": null, "outputPinColours": {} } ], "wires": [ { "id": "a-and", "source": { "owner": "in-a", "pin": "0" }, "target": { "owner": "and-ab", "pin": "0" }, "points": [], "colour": null }, { "id": "a-or", "source": { "owner": "in-a", "pin": "0" }, "target": { "owner": "or-ab", "pin": "0" }, "points": [], "colour": null }, { "id": "a-xor", "source": { "owner": "in-a", "pin": "0" }, "target": { "owner": "xor-ab", "pin": "0" }, "points": [], "colour": null }, { "id": "a-carry1", "source": { "owner": "in-a", "pin": "0" }, "target": { "owner": "carry-and-ab", "pin": "0" }, "points": [], "colour": null }, { "id": "b-and", "source": { "owner": "in-b", "pin": "0" }, "target": { "owner": "and-ab", "pin": "1" }, "points": [], "colour": null }, { "id": "b-or", "source": { "owner": "in-b", "pin": "0" }, "target": { "owner": "or-ab", "pin": "1" }, "points": [], "colour": null }, { "id": "b-xor", "source": { "owner": "in-b", "pin": "0" }, "target": { "owner": "xor-ab", "pin": "1" }, "points": [], "colour": null }, { "id": "b-carry1", "source": { "owner": "in-b", "pin": "0" }, "target": { "owner": "carry-and-ab", "pin": "1" }, "points": [], "colour": null }, { "id": "cin-sum", "source": { "owner": "in-cin", "pin": "0" }, "target": { "owner": "sum", "pin": "1" }, "points": [], "colour": null }, { "id": "cin-carry2", "source": { "owner": "in-cin", "pin": "0" }, "target": { "owner": "carry-and-cin", "pin": "0" }, "points": [], "colour": null }, { "id": "xor-sum", "source": { "owner": "xor-ab", "pin": "2" }, "target": { "owner": "sum", "pin": "0" }, "points": [], "colour": null }, { "id": "xor-carry2", "source": { "owner": "xor-ab", "pin": "2" }, "target": { "owner": "carry-and-cin", "pin": "1" }, "points": [], "colour": null }, { "id": "op0-not", "source": { "owner": "in-op0", "pin": "0" }, "target": { "owner": "not-op0", "pin": "0" }, "points": [], "colour": null }, { "id": "op1-not", "source": { "owner": "in-op1", "pin": "0" }, "target": { "owner": "not-op1", "pin": "0" }, "points": [], "colour": null }, { "id": "not1-n0", "source": { "owner": "not-op1", "pin": "1" }, "target": { "owner": "select-00", "pin": "0" }, "points": [], "colour": null }, { "id": "not0-n0", "source": { "owner": "not-op0", "pin": "1" }, "target": { "owner": "select-00", "pin": "1" }, "points": [], "colour": null }, { "id": "not1-n1", "source": { "owner": "not-op1", "pin": "1" }, "target": { "owner": "select-01", "pin": "0" }, "points": [], "colour": null }, { "id": "op0-n1", "source": { "owner": "in-op0", "pin": "0" }, "target": { "owner": "select-01", "pin": "1" }, "points": [], "colour": null }, { "id": "op1-n2", "source": { "owner": "in-op1", "pin": "0" }, "target": { "owner": "select-10", "pin": "0" }, "points": [], "colour": null }, { "id": "not0-n2", "source": { "owner": "not-op0", "pin": "1" }, "target": { "owner": "select-10", "pin": "1" }, "points": [], "colour": null }, { "id": "op1-n3", "source": { "owner": "in-op1", "pin": "0" }, "target": { "owner": "select-11", "pin": "0" }, "points": [], "colour": null }, { "id": "op0-n3", "source": { "owner": "in-op0", "pin": "0" }, "target": { "owner": "select-11", "pin": "1" }, "points": [], "colour": null }, { "id": "and-term0", "source": { "owner": "and-ab", "pin": "2" }, "target": { "owner": "term-and", "pin": "0" }, "points": [], "colour": null }, { "id": "n0-term0", "source": { "owner": "select-00", "pin": "2" }, "target": { "owner": "term-and", "pin": "1" }, "points": [], "colour": null }, { "id": "or-term1", "source": { "owner": "or-ab", "pin": "2" }, "target": { "owner": "term-or", "pin": "0" }, "points": [], "colour": null }, { "id": "n1-term1", "source": { "owner": "select-01", "pin": "2" }, "target": { "owner": "term-or", "pin": "1" }, "points": [], "colour": null }, { "id": "xor-term2", "source": { "owner": "xor-ab", "pin": "2" }, "target": { "owner": "term-xor", "pin": "0" }, "points": [], "colour": null }, { "id": "n2-term2", "source": { "owner": "select-10", "pin": "2" }, "target": { "owner": "term-xor", "pin": "1" }, "points": [], "colour": null }, { "id": "sum-term3", "source": { "owner": "sum", "pin": "2" }, "target": { "owner": "term-add", "pin": "0" }, "points": [], "colour": null }, { "id": "n3-term3", "source": { "owner": "select-11", "pin": "2" }, "target": { "owner": "term-add", "pin": "1" }, "points": [], "colour": null }, { "id": "term0-or01", "source": { "owner": "term-and", "pin": "2" }, "target": { "owner": "result-or-01", "pin": "0" }, "points": [], "colour": null }, { "id": "term1-or01", "source": { "owner": "term-or", "pin": "2" }, "target": { "owner": "result-or-01", "pin": "1" }, "points": [], "colour": null }, { "id": "term2-or23", "source": { "owner": "term-xor", "pin": "2" }, "target": { "owner": "result-or-23", "pin": "0" }, "points": [], "colour": null }, { "id": "term3-or23", "source": { "owner": "term-add", "pin": "2" }, "target": { "owner": "result-or-23", "pin": "1" }, "points": [], "colour": null }, { "id": "or01-result", "source": { "owner": "result-or-01", "pin": "2" }, "target": { "owner": "result-or", "pin": "0" }, "points": [], "colour": null }, { "id": "or23-result", "source": { "owner": "result-or-23", "pin": "2" }, "target": { "owner": "result-or", "pin": "1" }, "points": [], "colour": null }, { "id": "result-out", "source": { "owner": "result-or", "pin": "2" }, "target": { "owner": "out-result", "pin": "0" }, "points": [], "colour": null }, { "id": "carry1-or", "source": { "owner": "carry-and-ab", "pin": "2" }, "target": { "owner": "carry-or", "pin": "0" }, "points": [], "colour": null }, { "id": "carry2-or", "source": { "owner": "carry-and-cin", "pin": "2" }, "target": { "owner": "carry-or", "pin": "1" }, "points": [], "colour": null }, { "id": "carry-or-select", "source": { "owner": "carry-or", "pin": "2" }, "target": { "owner": "carry-select", "pin": "0" }, "points": [], "colour": null }, { "id": "n3-carry-select", "source": { "owner": "select-11", "pin": "2" }, "target": { "owner": "carry-select", "pin": "1" }, "points": [], "colour": null }, { "id": "carry-out", "source": { "owner": "carry-select", "pin": "2" }, "target": { "owner": "out-carry", "pin": "0" }, "points": [], "colour": null } ], "junctions": [], "displays": [], "annotations": [ { "id": "note-how-to-use", "type": "text", "text": "HOW TO USE\n1. Toggle A, B, and CIN.\n2. Set OP1 / OP0.\n3. Read RESULT and CARRY.", "position": { "x": -140, "y": -1250 }, "width": 288, "height": 210, "fontSize": 12, "colour": "#fff0f7", "background": "#383536" }, { "id": "note-opcode-table", "type": "text", "text": "OPCODE (OP1 OP0)\n00 = AND\n01 = OR\n10 = XOR\n11 = ADD", "position": { "x": -150, "y": -1000 }, "width": 300, "height": 150, "fontSize": 12, "colour": "#f3d36b", "background": "#352e18" }, { "id": "note-output-guide", "type": "text", "text": "OUTPUTS\nRESULT = selected logic result or ADD sum.\nCARRY = carry-out from ADD mode; otherwise LOW.", "position": { "x": -180, "y": -810 }, "width": 360, "height": 150, "fontSize": 12, "colour": "#b8f3ca", "background": "#28352c" }, { "id": "label-logic-paths", "type": "label", "text": "LOGIC PATHS", "position": { "x": -90, "y": -620 }, "width": 180, "height": 22, "fontSize": 12, "colour": "#f3d36b", "background": "#352e18" }, { "id": "label-mode-selector", "type": "label", "text": "MODE SELECTOR: only the matching opcode path is enabled", "position": { "x": -260, "y": -550 }, "width": 520, "height": 22, "fontSize": 11, "colour": "#b8d7ff", "background": "#282f38" }, { "id": "annotation-59389af7", "type": "text", "text": "Explain this part...", "position": { "x": -140, "y": -490 }, "width": 280, "height": 110, "fontSize": 11, "colour": "#d7eaff", "background": "#2f3338" }, { "id": "annotation-266ffa85", "type": "label", "text": "Label", "position": { "x": -90, "y": -340 }, "width": 180, "height": 22, "fontSize": 11, "colour": "#f3d36b", "background": "#352e18" } ] }, "customChips": {}, "collections": [ { "name": "LOGIC", "chips": [ "AND", "OR", "NOT", "NAND", "NOR", "XOR", "XNOR", "BUFFER" ] }, { "name": "BASIC", "chips": [ "CLOCK", "PULSE", "KEY", "3-STATE BUFFER" ] }, { "name": "IN/OUT", "chips": [ "IN-1", "IN-4", "IN-8", "OUT-1", "OUT-4", "OUT-8" ] }, { "name": "MERGE/SPLIT", "chips": [ "1-4BIT", "1-8BIT", "4-8BIT", "4-1BIT", "8-4BIT", "8-1BIT" ] }, { "name": "BUS", "chips": [ "BUS-1", "BUS-4", "BUS-8" ] }, { "name": "DISPLAY", "chips": [ "7-SEGMENT", "DOT DISPLAY", "RGB DISPLAY", "LED" ] }, { "name": "MEMORY", "chips": [ "ROM 256x16", "dev.RAM-8" ] }, { "name": "AUDIO", "chips": [ "BUZZER" ] } ], "collectionOrder": [ "LOGIC", "BASIC", "IN/OUT", "MERGE/SPLIT", "BUS", "DISPLAY", "MEMORY", "AUDIO", "CUSTOM" ], "starred": [ "LOGIC", "IN-1", "OUT-1" ], "settings": { "snapping": true, "straightWires": false, "grid": true, "simulationPaused": true, "stepsPerSecond": 13, "stepsPerClock": 8 }, "inputValues": { "in-op0": 1, "in-a": 1, "in-b": 1 }, "keyValues": { "ControlLeft": true, "Control": true, "Escape": false, "KeyZ": false, "z": false, "ShiftRight": false, "Shift": false, "IntlRo": false, "?": true, "/": false, "Delete": false, "KeyS": true, "s": true } }