diff --git a/synapse/cli/device_info_display.py b/synapse/cli/device_info_display.py
index 72b038f4..3c063c5d 100644
--- a/synapse/cli/device_info_display.py
+++ b/synapse/cli/device_info_display.py
@@ -69,6 +69,14 @@ def visualize_configuration(info_dict, status):
                 frame_rate = source.get("frame_rate", "Unknown")
                 node_tree.add(f"Frame Rate: {frame_rate} hz")
 
+                display_map = source.get("display_map", None)
+                if display_map:
+                    n_rows = len(display_map.get("row_map", []))
+                    n_cols = len(display_map.get("col_map", []))
+                    node_tree.add(
+                        f"Display Map: {n_rows} x {n_cols} (custom pin mapping)"
+                    )
+
                 optical_stim_status = nodes_status[index].get(
                     "optical_stimulation", None
                 )
diff --git a/synapse/client/nodes/optical_stimulation.py b/synapse/client/nodes/optical_stimulation.py
index 39b00e69..a7d17a3b 100644
--- a/synapse/client/nodes/optical_stimulation.py
+++ b/synapse/client/nodes/optical_stimulation.py
@@ -1,14 +1,48 @@
 from typing import Optional, List
 from synapse.api.node_pb2 import NodeConfig, NodeType
-from synapse.api.nodes.optical_stimulation_pb2 import OpticalStimulationConfig
+from synapse.api.nodes.optical_stimulation_pb2 import (
+    OpticalStimulationConfig,
+    DisplayMap,
+)
 from synapse.client.node import Node
 
+# Maximum logical display dimension and physical pin value supported by the
+# LUX16K / MUX01 gateware (must match MUX01_MAX_DIM / the 8-bit pin width).
+MAX_DISPLAY_DIM = 128
+MAX_PHYSICAL_PIN = 0xFF
+
+
+# Ready-made physical pin maps for the displays that were previously hardcoded
+# in the MUX01 gateware. Pass these as row_map/col_map to OpticalStimulation.
+
+# BIDIR_BIOHYBRID_V1 (NeRV512U biohybrid), 12 rows x 23 cols.
+BIOHYBRID_NERV512U_V1_ROW_MAP = [0, 64, 8, 72, 16, 80, 24, 88, 32, 96, 40, 104]
+BIOHYBRID_NERV512U_V1_COL_MAP = [
+    0, 1, 8, 9, 16, 17, 24, 25, 32, 33, 40, 41,
+    48, 49, 56, 57, 64, 65, 72, 73, 74, 75, 76,
+]
+
+# LED breakout board (60110001), 32 rows x 64 cols.
+# Rows interleave 0..15 with 64..79; cols are 0..31 then 64..95.
+LED_BOARD_60110001_ROW_MAP = [
+    v for i in range(16) for v in (i, i + 64)
+]
+LED_BOARD_60110001_COL_MAP = list(range(32)) + list(range(64, 96))
+
 
 class OpticalStimulation(Node):
     type = NodeType.kOpticalStimulation
 
     def __init__(
-        self, peripheral_id: int, pixel_mask: List[int], bit_width: int, frame_rate: int, gain: float, send_receipts: bool = False
+        self,
+        peripheral_id: int,
+        pixel_mask: List[int],
+        bit_width: int,
+        frame_rate: int,
+        gain: float,
+        send_receipts: bool = False,
+        row_map: Optional[List[int]] = None,
+        col_map: Optional[List[int]] = None,
     ):
         self.pixel_mask = pixel_mask
         self.peripheral_id = peripheral_id
@@ -16,6 +50,39 @@ def __init__(
         self.frame_rate = frame_rate
         self.gain = gain
         self.send_receipts = send_receipts
+        # Optional physical pin mapping. row_map[logical_row] / col_map[logical_col]
+        # give the physical chip pin; the lengths define the display dimensions.
+        # Both must be supplied together (or neither).
+        self.row_map = row_map
+        self.col_map = col_map
+        self._validate_display_map()
+
+    def _validate_display_map(self):
+        has_row = bool(self.row_map)
+        has_col = bool(self.col_map)
+        if has_row != has_col:
+            raise ValueError(
+                "row_map and col_map must both be provided together (or neither)"
+            )
+        if not has_row:
+            return
+        if len(self.row_map) > MAX_DISPLAY_DIM or len(self.col_map) > MAX_DISPLAY_DIM:
+            raise ValueError(
+                f"display map dimensions {len(self.row_map)}x{len(self.col_map)} "
+                f"exceed maximum {MAX_DISPLAY_DIM}x{MAX_DISPLAY_DIM}"
+            )
+        for pin in list(self.row_map) + list(self.col_map):
+            if pin < 0 or pin > MAX_PHYSICAL_PIN:
+                raise ValueError(
+                    f"display map pin {pin} out of range [0, {MAX_PHYSICAL_PIN}]"
+                )
+        if self.pixel_mask and len(self.pixel_mask) != len(self.row_map) * len(
+            self.col_map
+        ):
+            raise ValueError(
+                "pixel_mask length must equal len(row_map) * len(col_map) "
+                "when a display map is provided"
+            )
 
     def _to_proto(self):
         n = NodeConfig()
@@ -26,6 +93,11 @@ def _to_proto(self):
         p.frame_rate = self.frame_rate
         p.gain = self.gain
         p.send_receipts = self.send_receipts
+        if self.row_map and self.col_map:
+            display_map = DisplayMap()
+            display_map.row_map.extend(self.row_map)
+            display_map.col_map.extend(self.col_map)
+            p.display_map.CopyFrom(display_map)
         n.optical_stimulation.CopyFrom(p)
         return n
 
@@ -37,11 +109,19 @@ def _from_proto(proto: Optional[OpticalStimulationConfig]):
         if not isinstance(proto, OpticalStimulationConfig):
             raise ValueError("proto is not of type OpticalStimulationConfig")
 
+        row_map = None
+        col_map = None
+        if proto.HasField("display_map"):
+            row_map = list(proto.display_map.row_map)
+            col_map = list(proto.display_map.col_map)
+
         return OpticalStimulation(
             peripheral_id=proto.peripheral_id,
             pixel_mask=list(proto.pixel_mask),
             bit_width=proto.bit_width,
             frame_rate=proto.frame_rate,
             gain=proto.gain,
-            send_receipts=proto.send_receipts
+            send_receipts=proto.send_receipts,
+            row_map=row_map,
+            col_map=col_map,
         )