diff --git a/dataflow_neuro/chips.act b/dataflow_neuro/chips.act
index 85f2523..c200942 100644
--- a/dataflow_neuro/chips.act
+++ b/dataflow_neuro/chips.act
@@ -219,6 +219,7 @@ defproc texel_core (avMx1of2<N_IN> in, out;
     // Create TBUFs for each synapse column,
     // ctrl wired to mon line (first in each 4).
     TBUF_X4 syn_x_AMZI_tbuf[N_SYN_X * N_MON_AMZO_PER_SYN];
+    KEEP syn_AMZO_keeps[N_MON_AMZO_PER_SYN];
     sigbuf_boolarray<N_MON_AMZO_PER_SYN, 40> syn_mon_AMZO_sb(.out = syn_mon_AMZO, .supply = supply);
     (j:N_MON_AMZO_PER_SYN:
         (i:N_SYN_X:
@@ -227,13 +228,19 @@ defproc texel_core (avMx1of2<N_IN> in, out;
             syn_x_AMZI_tbuf[index].en = syn_mon_x[i*4];
             syn_x_AMZI_tbuf[index].y = syn_mon_AMZO_sb.in[j];
         )
+
+        syn_AMZO_keeps[j].y = syn_mon_AMZO_sb.in[j];
+        syn_AMZO_keeps[j].vdd = supply.vdd;
+        syn_AMZO_keeps[j].vss = supply.vss;
+
     )
 
 
-    // Create TBUFs for each neuron column,
+    // Create TBUFs for each neuron column, and add keeps.
     // ctrl wired to mon line (first in each 4).
     TBUF_X4 nrn_x_AMZI_tbuf[N_NRN_X * N_MON_AMZO_PER_NRN];
-    sigbuf_boolarray<N_MON_AMZO_PER_NRN, 40> nrn_mon_AMZO_sb(.out = nrn_mon_AMZO, .supply = supply);
+    KEEP nrn_AMZO_keeps[N_MON_AMZO_PER_NRN];
+    sigbuf_boolarray<N_MON_AMZO_PER_NRN, 40> nrn_mon_AMZO_sb(.out = nrn_mon_AMZO, .supply = supply); 
     (j:N_MON_AMZO_PER_NRN:
         (i:N_NRN_X:
             index = i*N_MON_AMZO_PER_NRN + j;
@@ -241,6 +248,11 @@ defproc texel_core (avMx1of2<N_IN> in, out;
             nrn_x_AMZI_tbuf[index].en = nrn_mon_x[i*2];
             nrn_x_AMZI_tbuf[index].y = nrn_mon_AMZO_sb.in[j];
         )
+
+        nrn_AMZO_keeps[j].y = nrn_mon_AMZO_sb.in[j];
+        nrn_AMZO_keeps[j].vdd = supply.vdd;
+        nrn_AMZO_keeps[j].vss = supply.vss;
+
     )
 
     // Create NON buffered signals from register to nrns.