diff --git a/sim/definitions.ts b/sim/definitions.ts
index ca29a2b9..1aed3faf 100644
--- a/sim/definitions.ts
+++ b/sim/definitions.ts
@@ -101,6 +101,131 @@ namespace pxsim {
         attachPowerOnRight: true,
         onboardComponents: ["buttonpair", "ledmatrix"],
     }
+    export const RASPBERRYPI_MODELB: BoardDefinition = {
+        visual: {
+            image: "/static/hardware/raspberrypi-model-b.svg",
+            outlineImage: "/static/hardware/raspberrypi-model-b-outline.svg",
+            width: 331,
+            height: 230,
+            pinDist: 9,
+            pinBlocks: [
+                { x: 5, y: 31, labels: ["3V3", "SDA", "SCL", "#4", "--", "#17", "#21", "#22", "--", "MOSI", "MISO", "SCLK", "--"]},
+                { x: 5, y: 39, labels: ["5V", "--", "GND", "TXD", "RXD", "#18", "--", "#23", "#24", "--", "#25", "CS0", "CS1"]}
+            ],
+        },
+        gpioPinBlocks: [
+            ["SDA", "SCL", "#4"],
+            ["#17", "#21", "#22"],
+            ["MOSI", "MISO", "SCLK"],
+            ["TXD", "RXD", "#18"],
+            ["#23", "#24"],
+            ["#25", "CS0", "CS1"],
+        ],
+        gpioPinMap: {
+            "P0": "SDA",
+            "P1": "SCL",
+            "P2": "#4",
+            "P3": "MOSI",
+            "P4": "MISO",
+            "P5": "SCLK",
+            "P6": "TXD",
+            "P7": "RXD",
+            "P8": "#18",
+            "P9": "#23",
+            "P10": "#24",
+            "P11": "#25",
+            "P12": "CS0",
+            "P13": "CS1",
+        },
+        groundPins: ["GND"],
+        threeVoltPins: ["3V3"],
+    }
+    export const SPARKFUN_PHOTON: BoardDefinition = {
+        visual: {
+            image: "/static/hardware/sparkfun-photon.svg",
+            outlineImage: "/static/hardware/sparkfun-photon-outline.svg",
+            width: 264.4,
+            height: 202.4,
+            pinDist: 9.5,
+            pinBlocks: [
+                {x: 72, y: 6, labels: ["~SCL/D1", "~SDA/D0", " ", "GND0", "SCK/A3", "~MISO/A4", "~MOSI/A5", "SS/A2", "~WKP", "DAC"]},
+                {x: 174, y: 6, labels: ["D7", "D6", "D5", "D4", "~D3", "~D2", "~TX", "~RX"]},
+                {x: 107, y: 188, labels: [" ", " ", "RESET", "3.3V", "V-USB", "GND1", "GND2", "VIN"]},
+                {x: 193, y: 188, labels: ["A0", "A1", "A2", "A3", "A4", "A5"]},
+            ],
+        },
+        gpioPinBlocks: [
+            ["~SCL/D1", "~SDA/D0", "SCK/A3", "~MISO/A4", "~MOSI/A5", "SS/A2"],
+            ["D7", "D6", "D5", "D4", "~D3", "~D2", "~TX", "~RX"],
+            ["A0", "A1", "A2", "A3", "A4", "A5"],
+        ],
+        gpioPinMap: {
+            "P0": "A0",
+            "P1": "A1",
+            "P2": "A2",
+            "P3": "A3",
+            "P4": "A4",
+            "P5": "A5",
+            "P6": "~SDA/D0",
+            "P7": "~SCL/D1",
+            "P8": "~D2",
+            "P9": "~D3",
+            "P10": "D4",
+            "P11": "D5",
+            "P12": "D6",
+            "P13": "D7",
+            "P14": "SS/A2",
+            "P15": "SCK/A3",
+            "P16": "~MISO/A4",
+            "P19": "~MOSI/A5",
+        },
+        groundPins: ["GND0", "GND1", "GND2"],
+        threeVoltPins: ["3.3V"],
+    }
+    export const ARDUINO_ZERO: BoardDefinition = {
+        visual: {
+            image: "/static/hardware/arduino-zero.png",
+            outlineImage: "/static/hardware/arduino-zero-outline.svg",
+            width: 1000,
+            height: 762,
+            pinDist: 35.5,
+            pinBlocks: [
+                {x: 276.8, y: 17.8, labels: ["SCL", "SDA", "AREF", "GND0", "~13", "~12", "~11", "~10", "~9", "~8"]},
+                {x: 655.5, y: 17.8, labels: ["7", "~6", "~5", "~4", "~3", "2", "TX->1", "RX<-0"]},
+                {x: 411.7, y: 704.6, labels: ["ATN", "IOREF", "RESET", "3.3V", "5V", "GND1", "GND2", "VIN"]},
+                {x: 732.9, y: 704.6, labels: ["A0", "A1", "A2", "A3", "A4", "A5"]},
+            ],
+        },
+        gpioPinBlocks: [
+            ["A0", "A1", "A2", "A3", "A4", "A5"],
+            ["~13", "~12", "~11", "~10", "~9", "~8"],
+            ["7", "~6", "~5", "~4", "~3", "2", "TX->1", "RX<-0"],
+        ],
+        gpioPinMap: {
+            "P0": "A0",
+            "P1": "A1",
+            "P2": "A2",
+            "P3": "A3",
+            "P4": "A4",
+            "P5": "A5",
+            "P6": "RX<-0",
+            "P7": "TX->1",
+            "P8": "2",
+            "P9": "~3",
+            "P10": "~4",
+            "P11": "~5",
+            "P12": "~6",
+            "P13": "7",
+            "P14": "~8",
+            "P15": "~9",
+            "P16": "~10",
+            "P19": "~11",
+            "P20": "~12",
+        },
+        groundPins: ["GND0", "GND1", "GND2"],
+        threeVoltPins: ["3.3V"],
+    }
+    
     export const PART_DEFINITIONS: Map<PartDefinition> = {
         "ledmatrix": {
             visual: "ledmatrix",