diff --git a/devices/common/pci/bandit.cpp b/devices/common/pci/bandit.cpp
index 6ebd6a1..4ed2697 100644
--- a/devices/common/pci/bandit.cpp
+++ b/devices/common/pci/bandit.cpp
@@ -196,7 +196,7 @@ void Bandit::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size
                 LOG_F(
                     WARNING, "%s: write config cycle type 1 not supported yet %02x:%02x.%x @%02x.%c = %0*x",
                     this->name.c_str(), bus_num, dev_num, fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
                 return;
             }
@@ -208,7 +208,7 @@ void Bandit::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size
                     ERROR, "%s: write invalid IDSEL=0x%X config:0x%X ??:??.%x? @%02x?.%c = %0*x",
                     this->name.c_str(), idsel, this->config_addr,
                     fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
                 return;
             }
@@ -225,7 +225,7 @@ void Bandit::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size
                 LOG_F(
                     ERROR, "%s err: write attempt to non-existing PCI device ??:%02x.%x @%02x.%c = %0*x",
                     this->name.c_str(), dev_num, fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
             }
         } else {
@@ -358,7 +358,7 @@ void Chaos::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
                 LOG_F(
                     WARNING, "%s: write config cycle type 1 not supported yet %02x:%02x.%x @%02x.%c = %0*x",
                     this->name.c_str(), bus_num, dev_num, fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
                 return;
             }
@@ -370,7 +370,7 @@ void Chaos::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
                     ERROR, "%s: write invalid IDSEL=0x%X config:0x%X ??:??.%x? @%02x?.%c = %0*x",
                     this->name.c_str(), idsel, this->config_addr,
                     fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
                 return;
             }
@@ -382,7 +382,7 @@ void Chaos::write(uint32_t rgn_start, uint32_t offset, uint32_t value, int size)
                 LOG_F(
                     ERROR, "%s err: write attempt to non-existing VCI device ??:%02x.%x @%02x.%c = %0*x",
                     this->name.c_str(), dev_num, fun_num, reg_offs + (offset & 3),
-                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+                    size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
                 );
             }
         } else {
diff --git a/devices/common/pci/pcidevice.cpp b/devices/common/pci/pcidevice.cpp
index ea060b0..9148e6a 100644
--- a/devices/common/pci/pcidevice.cpp
+++ b/devices/common/pci/pcidevice.cpp
@@ -156,7 +156,7 @@ void PCIDevice::pci_cfg_write(uint32_t reg_offs, uint32_t value, uint32_t size)
         LOG_F(
             WARNING, "%s: attempt to write to reserved/unimplemented register @%02x.%c = %0*x",
             this->pci_name.c_str(), reg_offs,
-            size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, value
+            size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size, size * 2, flip_sized(value, size)
         );
     }
 }
diff --git a/devices/memctrl/mpc106.cpp b/devices/memctrl/mpc106.cpp
index 7ca2ab4..3c85aef 100644
--- a/devices/memctrl/mpc106.cpp
+++ b/devices/memctrl/mpc106.cpp
@@ -169,8 +169,8 @@ void MPC106::pci_write(uint32_t value, uint32_t size) {
             "%s err: write attempt to non-local PCI bus, config_addr = %x %02x:%02x.%x @%02x.%c = %0*x",
 			this->name.c_str(), this->config_addr, bus_num, dev_num, fun_num, reg_offs,
 			size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size,
-			size * 2, value
-		);
+            size * 2, flip_sized(value, size)
+        );
         return;
     }
 
@@ -185,7 +185,7 @@ void MPC106::pci_write(uint32_t value, uint32_t size) {
                 "%s err: write attempt to non-existing PCI device %02x:%02x.%x @%02x.%c = %0*x",
                 this->name.c_str(), bus_num, dev_num, fun_num, reg_offs,
                 size == 4 ? 'l' : size == 2 ? 'w' : size == 1 ? 'b' : '0' + size,
-                size * 2, value
+                size * 2, flip_sized(value, size)
             );
         }
     }
diff --git a/memaccess.h b/memaccess.h
index 46bc60c..9f2d81b 100644
--- a/memaccess.h
+++ b/memaccess.h
@@ -177,6 +177,15 @@ inline uint32_t read_mem_rev(const uint8_t* buf, uint32_t size) {
   }
 }
 
+inline uint32_t flip_sized(uint32_t value, uint32_t size) {
+    switch (size) {
+    case 1: return value;
+    case 2: return BYTESWAP_16(value);
+    case 4: return BYTESWAP_32(value);
+    default: LOG_F(ERROR, "flip_sized: invalid size %d!", size); return 0xffffffff;
+    }
+}
+
 /* write the specified value of the specified size to memory pointed
    to by addr, perform necessary byte swapping so that the byte order
    of the destination remains unchanged. */