diff --git a/artiq/gateware/targets/kc705_sma_spi.py b/artiq/gateware/targets/kc705_sma_spi.py
new file mode 100644
index 000000000..fbf26e78d
--- /dev/null
+++ b/artiq/gateware/targets/kc705_sma_spi.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python3
+
+import argparse
+
+from migen import *
+
+from migen.build.generic_platform import *
+from misoc.targets.kc705 import soc_kc705_args, soc_kc705_argdict
+from misoc.integration.builder import builder_args, builder_argdict
+
+from artiq.gateware.amp import build_artiq_soc
+from artiq.gateware import rtio
+from artiq.gateware.rtio.phy import ttl_simple, spi
+
+
+from .kc705_dds import _NIST_Ions
+
+
+_sma_spi = [
+    ("sma_spi", 0,
+        Subsignal("clk", Pins("Y23")),  # user_sma_gpio_p
+        Subsignal("cs_n", Pins("Y24")),  # user_sma_gpio_n
+        Subsignal("mosi", Pins("L25")),  # user_sma_clk_p
+        Subsignal("miso", Pins("K25")),  # user_sma_clk_n
+        IOStandard("LVCMOS33")),
+]
+
+
+class SMA_SPI(_NIST_Ions):
+    """
+    SPI on 4 SMA for PDQ2 test/demo.
+    """
+    def __init__(self, cpu_type="or1k", **kwargs):
+        _NIST_Ions.__init__(self, cpu_type, **kwargs)
+
+        platform = self.platform
+        self.platform.add_extension(_sma_spi)
+
+        rtio_channels = []
+
+        phy = ttl_simple.Output(platform.request("user_led", 2))
+        self.submodules += phy
+        rtio_channels.append(rtio.Channel.from_phy(phy))
+
+        ams101_dac = self.platform.request("ams101_dac", 0)
+        phy = ttl_simple.Output(ams101_dac.ldac)
+        self.submodules += phy
+        rtio_channels.append(rtio.Channel.from_phy(phy))
+
+        phy = spi.SPIMaster(ams101_dac)
+        self.submodules += phy
+        rtio_channels.append(rtio.Channel.from_phy(
+            phy, ofifo_depth=4, ififo_depth=4))
+
+        phy = spi.SPIMaster(self.platform.request("sma_spi"))
+        self.submodules += phy
+        rtio_channels.append(rtio.Channel.from_phy(
+            phy, ofifo_depth=128, ififo_depth=128))
+
+        self.config["HAS_RTIO_LOG"] = None
+        self.config["RTIO_LOG_CHANNEL"] = len(rtio_channels)
+        rtio_channels.append(rtio.LogChannel())
+
+        self.add_rtio(rtio_channels)
+
+
+def main():
+    parser = argparse.ArgumentParser(
+        description="ARTIQ device binary builder / "
+        "KC705 SMA SPI demo/test for PDQ2")
+    builder_args(parser)
+    soc_kc705_args(parser)
+    args = parser.parse_args()
+
+    soc = SMA_SPI(**soc_kc705_argdict(args))
+    build_artiq_soc(soc, builder_argdict(args))
+
+
+if __name__ == "__main__":
+    main()