diff --git a/firmware/sections.lds b/firmware/sections.lds
index f914b46..8f89015 100644
--- a/firmware/sections.lds
+++ b/firmware/sections.lds
@@ -10,12 +10,12 @@ means.
 MEMORY {
 	/* the memory in the testbench is 128k in size;
 	 * set LENGTH=96k and leave at least 32k for stack */
-	mem : ORIGIN = 0x00000000, LENGTH = 0x00018000
+	mem : ORIGIN = 0x00000000, LENGTH = 0x00040000
 }
 
 SECTIONS {
 	.memory : {
-		. = 0x000000;
+		. = 0x10000;
 		start*(.text);
 		*(.text);
 		*(*);
diff --git a/firmware/start.S b/firmware/start.S
index aa2a36b..a0ff974 100644
--- a/firmware/start.S
+++ b/firmware/start.S
@@ -378,7 +378,7 @@ start:
 
 #ifdef ENABLE_HELLO
 	/* set stack pointer */
-	lui sp,(128*1024)>>12
+	lui sp,(64*1024)>>12
 
 	/* call hello C code */
 	jal ra,hello
@@ -455,7 +455,7 @@ start:
 	TEST(simple)
 
 	/* set stack pointer */
-	lui sp,(128*1024)>>12
+	lui sp,(64*1024)>>12
 
 	/* set gp and tp */
 	lui gp, %hi(0xdeadbeef)
diff --git a/testbench_wb.v b/testbench_wb.v
index 07a201b..08b3259 100644
--- a/testbench_wb.v
+++ b/testbench_wb.v
@@ -198,9 +198,9 @@ module picorv32_wb #(
       .ENABLE_TRACE(1),
       .MASKED_IRQ(32'h0000_0000),
       .LATCHED_IRQ(32'hffff_ffff),
-      .PROGADDR_RESET(32'h0000_0000),
-      .PROGADDR_IRQ(32'h0000_0010),
-      .STACKADDR(32'hffff_ffff)
+      .PROGADDR_RESET(32'h0001_0000),
+      .PROGADDR_IRQ(32'h0001_0010),
+      .STACKADDR(32'h0001_0000)
   ) picorv32_core (
       .clk   (clk),
       .resetn(resetn),