diff --git a/src/main/scala/radiance/subsystem/Configs.scala b/src/main/scala/radiance/subsystem/Configs.scala
index 83f8007..8c3b2dd 100644
--- a/src/main/scala/radiance/subsystem/Configs.scala
+++ b/src/main/scala/radiance/subsystem/Configs.scala
@@ -113,7 +113,7 @@ class WithRadianceGemmini(location: HierarchicalLocation,
         meshColumns = dim,
         tile_latency = 0,
         dma_maxbytes = site(CacheBlockBytes),
-        dma_buswidth = dim * 32,
+        dma_buswidth = 256, // TODO: parameterize
         tl_ext_mem_base = smKey.address,
         sp_banks = smKey.numBanks,
         sp_capacity = CapacityInKilobytes(smKey.size >> 10),
diff --git a/src/main/scala/radiance/tile/AccNode.scala b/src/main/scala/radiance/tile/AccNode.scala
index b6109bb..31a37d4 100644
--- a/src/main/scala/radiance/tile/AccNode.scala
+++ b/src/main/scala/radiance/tile/AccNode.scala
@@ -12,7 +12,7 @@ class AccBundle extends Bundle {
   val status = Input(UInt(1.W))
 
   def dest(): UInt = { cmd.bits(7, 5) }
-  def masked(): UInt = { cmd.bits & x"ffffff1f".U }
+  def mask: UInt = x"ffffff1f".U
 }
 
 case class NullParams()
diff --git a/src/main/scala/radiance/tile/GemminiTile.scala b/src/main/scala/radiance/tile/GemminiTile.scala
index c0791c2..e2a5df9 100644
--- a/src/main/scala/radiance/tile/GemminiTile.scala
+++ b/src/main/scala/radiance/tile/GemminiTile.scala
@@ -188,14 +188,11 @@ class GemminiTileModuleImp(outer: GemminiTile) extends BaseTileModuleImp(outer)
   ciscInst := 0.U.asTypeOf(ciscInstT)
 
   val tileSize = outer.gemminiParams.tileSize
-  val (boundsInst, spadQuartile) = if (tileSize == 4) {
-    (ciscInstT.Lit(_.inst -> 0x1220b07b.U, _.rs1 -> 0.U, _.rs2 -> x"4_00040004".U), 0x80)
-  } else if (tileSize == 8) {
-    (ciscInstT.Lit(_.inst -> 0x1220b07b.U, _.rs1 -> 0.U, _.rs2 -> x"8_00080008".U), 0x200)
-  } else {
-    (ciscInstT.Lit(_.inst -> 0x1220b07b.U, _.rs1 -> 0.U, _.rs2 -> (tileSize | (tileSize << 16) | (tileSize << 32)).U),
+  val (boundsInst, spadQuartile) = (ciscInstT.Lit(_.inst -> 0x1220b07b.U, _.rs1 -> 0.U,
+    _.rs2 -> (tileSize | (tileSize << 16) | (BigInt(tileSize) << 32)).U),
       tileSize * tileSize * outer.gemminiParams.gemminiConfig.DIM)
-  }
+  println(s"gemmini cisc initialized with DIM=${outer.gemminiParams.gemminiConfig.DIM}, tileSize=${tileSize}")
+  println(f"boundsInst=${boundsInst.litValue}%x, tileSize=${tileSize}, quartile=${spadQuartile}")
   when (ciscValid) {
     assert(!accSlave.cmd.valid, "cisc state machine already busy")
     switch (ciscId) {
@@ -217,6 +214,12 @@ class GemminiTileModuleImp(outer: GemminiTile) extends BaseTileModuleImp(outer)
           ciscInstT.Lit(_.inst -> 0x1020b07b.U, _.rs1 -> 0x1.U, _.rs2 -> x"0_000002b8".U)
         ))
       }
+      is (3.U) {
+        ciscInst := microcodeEntry(Seq(boundsInst,
+          ciscInstT.Lit(_.inst -> 0x3020b07b.U, _.rs1 -> (spadQuartile * 1).U, _.rs2 -> (spadQuartile * 4).U),
+          ciscInstT.Lit(_.inst -> 0x1020b07b.U, _.rs1 -> 0x0.U, _.rs2 -> x"0_000002b8".U)
+        ))
+      }
       is (8.U) {
         val inst = Wire(ciscInstT)
         inst.inst := 0x1820b07b.U
diff --git a/src/main/scala/radiance/tile/RadianceCluster.scala b/src/main/scala/radiance/tile/RadianceCluster.scala
index 9c60854..382c9cc 100644
--- a/src/main/scala/radiance/tile/RadianceCluster.scala
+++ b/src/main/scala/radiance/tile/RadianceCluster.scala
@@ -5,7 +5,7 @@ package radiance.tile
 
 import chisel3._
 import chisel3.util._
-import freechips.rocketchip.diplomacy.{AddressSet, BufferParams, ClockCrossingType, TransferSizes}
+import freechips.rocketchip.diplomacy.{AddressSet, BigIntHexContext, BufferParams, ClockCrossingType, TransferSizes}
 import org.chipsalliance.diplomacy.lazymodule._
 import freechips.rocketchip.prci.ClockSinkParameters
 import freechips.rocketchip.subsystem._
@@ -183,8 +183,8 @@ class RadianceCluster (
         guard_monitors { implicit p =>
           dist := TLBuffer(BufferParams(1, false, true), BufferParams(0)) := node
         }
-        val fanout = Seq.fill(sp_subbanks) {
-          connect_xbar_name(dist, Some(s"spad_g${gemmini_idx}_fanout_$suffix"))
+        val fanout = Seq.tabulate(sp_subbanks) { w =>
+          connect_xbar_name(dist, Some(s"spad_g${gemmini_idx}w${w}_fanout_$suffix"))
         }
         Seq.fill(smem_width / sp_width_bytes)(fanout).flatten // smem wider than spad, duplicate masters
       }
@@ -336,8 +336,8 @@ class RadianceCluster (
 
   val traceTLNode = TLAdapterNode(clientFn = c => c, managerFn = m => m)
   // printf and perf counter buffer
-  TLRAM(AddressSet(smem_key.address + smem_size, numCoresInCluster * 0x200 - 1)) :=
-    traceTLNode := TLBuffer() := TLFragmenter(4, 4) := clbus.outwardNode
+  TLRAM(AddressSet(smem_key.address + smem_size, numCoresInCluster * 0x200 - 1)) := traceTLNode :=
+    TLBuffer() := TLFragmenter(4, 4) := clbus.outwardNode
 
   p(RadianceFrameBufferKey).foreach { key =>
     val fb = LazyModule(new FrameBuffer(key.baseAddress, key.width, key.size, key.validAddress, key.fbName))
@@ -381,7 +381,7 @@ class RadianceClusterModuleImp(outer: RadianceCluster) extends ClusterModuleImp(
     b.resp <> synchronizer.io.resp // broadcast
   }
 
-  val coreAcc = outer.radianceAccSlaveNodes.head.in.head._1
+  val coreAccs = outer.radianceAccSlaveNodes.map(_.in.head._1)
   val gemminiAccs = outer.gemminiAccMasterNodes.map(_.out.head._1)
   // val gemminiTileAcc = outer.gemminiTile.accSlaveNode.in.head._1
 
@@ -389,12 +389,14 @@ class RadianceClusterModuleImp(outer: RadianceCluster) extends ClusterModuleImp(
   // gemminiAcc.status := gemminiTileAcc.status
 
   gemminiAccs.zipWithIndex.foreach { case (g, gi) =>
-    g.cmd.bits := coreAcc.masked
-    g.cmd.valid := coreAcc.cmd.valid && (coreAcc.dest === gi.U)
+    val active = coreAccs.map(acc => acc.cmd.valid && (acc.dest() === gi.U))
+    val selected = PriorityEncoder(active)
+    g.cmd.bits := VecInit(coreAccs.map(_.cmd.bits))(selected) & g.mask
+    g.cmd.valid := VecInit(active).reduceTree(_ || _)
   }
 
   // this might need some more tweaking (e.g. bitmask instead of or)
-  outer.radianceAccSlaveNodes.foreach(_.in.head._1.status := VecInit(gemminiAccs.map(_.status)).reduceTree(_ | _))
+  coreAccs.foreach(_.status := VecInit(gemminiAccs.map(_.status)).reduceTree(_ | _))
 
   (outer.traceTLNode.in.map(_._1) zip outer.traceTLNode.out.map(_._1)).foreach { case (i, o) =>
     o.a <> i.a