diff --git a/hw/chimera_pkg.sv b/hw/chimera_pkg.sv
index ed9cca1..c90336e 100644
--- a/hw/chimera_pkg.sv
+++ b/hw/chimera_pkg.sv
@@ -50,8 +50,8 @@ package chimera_pkg;
 
    localparam int HyperRegIdx = 2;
    localparam int HyperAXIIdx = 5;
-   localparam doub_bt HyperRegionStart = 64'h3000_1000;
-   localparam doub_bt HyperRegionEnd = 64'h3000_2000;
+   localparam doub_bt HyperRegionStart = 64'h3000_2000;
+   localparam doub_bt HyperRegionEnd = 64'h3000_3000;
 
    localparam aw_bt ClusterNarrowAxiMstIdWidth = 1;
 
@@ -102,9 +102,9 @@ package chimera_pkg;
       // REG CFG
       cfg.RegExtNumSlv = ExtRegNum;
       cfg.RegExtNumRules = ExtRegNum;
-      cfg.RegExtRegionIdx = {8'h1, 8'h0};  // SnitchBootROM
-      cfg.RegExtRegionStart = {TopLevelRegionStart, SnitchBootROMRegionStart};
-      cfg.RegExtRegionEnd = {TopLevelRegionEnd, SnitchBootROMRegionEnd};
+      cfg.RegExtRegionIdx = {8'h2, 8'h1, 8'h0};  // SnitchBootROM
+      cfg.RegExtRegionStart = {HyperRegionStart, TopLevelRegionStart, SnitchBootROMRegionStart};
+      cfg.RegExtRegionEnd = {HyperRegionEnd, TopLevelRegionEnd, SnitchBootROMRegionEnd};
 
       // ACCEL HART/IRQ CFG
       cfg.NumExtIrqHarts = ExtCores;
diff --git a/hw/chimera_top_wrapper.sv b/hw/chimera_top_wrapper.sv
index bfb1725..66ed3d3 100644
--- a/hw/chimera_top_wrapper.sv
+++ b/hw/chimera_top_wrapper.sv
@@ -339,7 +339,7 @@ module chimera_top_wrapper
               .IsClockODelayed(0), // SCHEREMO: REVIEWME
               .AxiAddrWidth(Cfg.AddrWidth),
               .AxiDataWidth(Cfg.AxiDataWidth),
-              .AxiIdWidth(Cfg.AxiMstIdWidth + 4),
+              .AxiIdWidth($bits(axi_slv_req[0].aw.id)),
               .AxiUserWidth(Cfg.AxiUserWidth),
 
               .axi_req_t(axi_slv_req_t),