diff --git a/src/chipset/ali1531.c b/src/chipset/ali1531.c
index 23a4f2564..c29d831fc 100644
--- a/src/chipset/ali1531.c
+++ b/src/chipset/ali1531.c
@@ -41,23 +41,20 @@ typedef struct ali1531_t
     smram_t *smram;
 } ali1531_t;
 
-void ali1531_shadow_recalc(ali1531_t *dev)
+void ali1531_shadow_recalc(int cur_reg, ali1531_t *dev)
 {
     for (uint32_t i = 0; i < 8; i++)
-    {
-        mem_set_mem_state_both(0xc0000 + (i << 14), 0x4000, (((dev->pci_conf[0x4c] >> i) & 1) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | (((dev->pci_conf[0x4e] >> i) & 1) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY));
-        mem_set_mem_state_both(0xe0000 + (i << 14), 0x4000, (((dev->pci_conf[0x4d] >> i) & 1) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | (((dev->pci_conf[0x4f] >> i) & 1) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY));
-    }
+        mem_set_mem_state_both(0xc0000 + ((cur_reg & 1) << 17) + (i << 14), 0x4000, (((dev->pci_conf[0x4c + (cur_reg & 1)] >> i) & 1) ? MEM_READ_INTERNAL : MEM_READ_EXTANY) | (((dev->pci_conf[0x4e + (cur_reg & 1)] >> i) & 1) ? MEM_WRITE_INTERNAL : MEM_WRITE_EXTANY));
 
-    shadowbios = !!(dev->pci_conf[0x4d] & 0xf0);
-    shadowbios_write = !!(dev->pci_conf[0x4f] & 0xf0);
-
-    flushmmucache();
+    flushmmucache_nopc();
 }
 
 void ali1531_smm_recalc(uint8_t smm_state, ali1531_t *dev)
 {
-    if (!!(dev->pci_conf[0x48] & 1))
+
+    smram_disable_all();
+
+    if (dev->pci_conf[0x48] & 1)
     {
         switch (smm_state)
         {
@@ -86,12 +83,9 @@ void ali1531_smm_recalc(uint8_t smm_state, ali1531_t *dev)
             smram_map(1, 0x30000, 0x10000, 1);
             break;
         }
-        
     }
-    else
-        smram_disable_all();
 
-    flushmmucache();
+    flushmmucache_nopc();
 }
 
 static void
@@ -160,7 +154,7 @@ ali1531_write(int func, int addr, uint8_t val, void *priv)
     case 0x4e:
     case 0x4f:
         dev->pci_conf[addr] = val;
-        ali1531_shadow_recalc(dev);
+        ali1531_shadow_recalc(addr, dev);
         break;
 
     case 0x57: /* H2PO */
@@ -202,7 +196,7 @@ ali1531_write(int func, int addr, uint8_t val, void *priv)
 	case 0x6e:
 	case 0x6f:
         dev->pci_conf[addr] = val;
-        spd_write_drbs(dev->pci_conf, 0x60, 0x6f, 2);
+        spd_write_drbs(dev->pci_conf, 0x60, 0x6f, 1);
         break;
 
     case 0x72:
@@ -274,7 +268,6 @@ ali1531_reset(void *priv)
     ali1531_write(0, 0x42, 0x00, dev);
     ali1531_write(0, 0x43, 0x00, dev);
     ali1531_write(0, 0x47, 0x00, dev);
-    ali1531_shadow_recalc(dev);
     ali1531_write(0, 0x60, 0x08, dev);
     ali1531_write(0, 0x61, 0x40, dev);
 }
diff --git a/src/chipset/ali1543.c b/src/chipset/ali1543.c
index c14a61e83..67b513a94 100644
--- a/src/chipset/ali1543.c
+++ b/src/chipset/ali1543.c
@@ -96,6 +96,8 @@ typedef struct ali1543_t
 
 */
 
+int ali1533_irq_routing[15] = {9, 3, 0x0a, 4, 5, 7, 6, 1, 0x0b, 0, 0x0c, 0, 0x0e, 0, 0x0f};
+
 void ali1533_ddma_handler(ali1543_t *dev)
 {
     for (uint8_t i = 0; i < 8; i++)
@@ -131,8 +133,23 @@ ali1533_write(int func, int addr, uint8_t val, void *priv)
         dev->pci_conf[addr] = val & 0x7f;
         break;
 
-    case 0x42:
+    case 0x42: /* ISA Bus Speed */
         dev->pci_conf[addr] = val & 0xcf;
+        switch(val & 7)
+        {
+            case 0:
+            cpu_set_isa_speed(7.16);
+            break;
+            case 1:
+            case 2:
+            case 3:
+            case 4:
+            case 5:
+            case 6:
+            cpu_set_isa_pci_div(val & 7);
+            break;
+        }
+
         break;
 
     case 0x43:
@@ -146,7 +163,7 @@ ali1533_write(int func, int addr, uint8_t val, void *priv)
     case 0x44: /* Set IRQ Line for Primary IDE if it's on native mode */
         dev->pci_conf[addr] = 0xdf;
         if (dev->ide_conf[0x09] & 1)
-            sff_set_irq_line(dev->ide_controller[0], val & 0x0f);
+            sff_set_irq_line(dev->ide_controller[0], ((val & 0x0f) == 0) ? ali1533_irq_routing[(val & 0x0f) - 1] : PCI_IRQ_DISABLED);
         break;
 
     case 0x45: /* DDMA Enable */
@@ -157,8 +174,8 @@ ali1533_write(int func, int addr, uint8_t val, void *priv)
     case 0x48: /* PCI IRQ Routing */
     case 0x49:
         dev->pci_conf[addr] = val;
-        pci_set_irq_routing(((addr & 1) * 2) + 2, ((val & 0xf0) == 0) ? (val & 0xf0) : PCI_IRQ_DISABLED);
-        pci_set_irq_routing(((addr & 1) * 2) + 1, ((val & 0x0f) == 0) ? (val & 0x0f) : PCI_IRQ_DISABLED);
+        pci_set_irq_routing(((addr & 1) * 2) + 2, (((val >> 4) & 0x0f) == 0) ? ali1533_irq_routing[((val >> 4) & 0x0f) - 1] : PCI_IRQ_DISABLED);
+        pci_set_irq_routing(((addr & 1) * 2) + 1, ((val & 0x0f) == 0) ? ali1533_irq_routing[(val & 0x0f) - 1] : PCI_IRQ_DISABLED);
         break;
 
     case 0x53: /* USB Enable */
@@ -222,13 +239,12 @@ ali1533_write(int func, int addr, uint8_t val, void *priv)
 
     case 0x74: /* USB IRQ Routing */
         dev->pci_conf[addr] = val & 0xdf;
-        pci_set_irq_routing(dev->usb_slot, ((val & 0x0f) == 0) ? (val & 0x0f) : PCI_IRQ_DISABLED);
         break;
 
     case 0x75: /* Set IRQ Line for Secondary IDE if it's on native mode */
         dev->pci_conf[addr] = val & 0x1f;
         if (dev->ide_conf[0x09] & 8)
-            sff_set_irq_line(dev->ide_controller[1], val & 0x0f);
+            sff_set_irq_line(dev->ide_controller[1], ((val & 0x0f) == 0) ? ali1533_irq_routing[(val & 0x0f) - 1] : PCI_IRQ_DISABLED);
         break;
 
     case 0x76: /* PMU IRQ Routing */
@@ -319,28 +335,28 @@ void ali5229_ide_handler(ali1543_t *dev)
         /* Primary Channel Setup */
         if (dev->ide_conf[0x09] & 0x10)
         {
+            ide_pri_enable();
             if (!(dev->ide_conf[0x09] & 1))
-                sff_set_irq_line(dev->ide_controller[0], dev->ide_conf[0x3c] & 0xf);
+                sff_set_irq_line(dev->ide_controller[0], (dev->ide_conf[0x3c] != 0) ? ali1533_irq_routing[(dev->ide_conf[0x3c] & 0x0f) - 1] : PCI_IRQ_DISABLED);
 
             ide_set_base(0, current_pri_base);
             ide_set_side(0, current_pri_side);
 
             sff_bus_master_handler(dev->ide_controller[0], dev->ide_conf[0x09] & 0x80, (dev->ide_conf[0x20] & 0xf0) | (dev->ide_conf[0x21] << 8));
-            ide_pri_enable();
             ali1543_log("M5229 PRI: BASE %04x SIDE %04x\n", current_pri_base, current_pri_side);
         }
 
         /* Secondary Channel Setup */
         if (dev->ide_conf[0x09] & 8)
         {
+            ide_sec_enable();
             if (!(dev->ide_conf[0x09] & 4))
-                sff_set_irq_line(dev->ide_controller[1], dev->ide_conf[0x3c] & 0xf);
+                sff_set_irq_line(dev->ide_controller[1], (dev->ide_conf[0x3c] != 0) ? ali1533_irq_routing[(dev->ide_conf[0x3c] & 0x0f) - 1] : PCI_IRQ_DISABLED);
 
             ide_set_base(1, current_sec_base);
             ide_set_side(1, current_sec_side);
 
             sff_bus_master_handler(dev->ide_controller[1], dev->ide_conf[0x09] & 0x80, ((dev->ide_conf[0x20] & 0xf0) | (dev->ide_conf[0x21] << 8)) + 8);
-            ide_sec_enable();
             ali1543_log("M5229 SEC: BASE %04x SIDE %04x\n", current_sec_base, current_sec_side);
         }
     }
diff --git a/src/win/Makefile.mingw b/src/win/Makefile.mingw
index 7f493d925..a4d5413cf 100644
--- a/src/win/Makefile.mingw
+++ b/src/win/Makefile.mingw
@@ -51,6 +51,9 @@ ifeq ($(DEV_BUILD), y)
  ifndef I450KX
   I450KX		:= y
  endif
+ ifndef M154X
+  M145X		:= y
+ endif
  ifndef LASERXT
   LASERXT	:= y
  endif
@@ -130,6 +133,9 @@ else
  ifndef LASERXT
   LASERXT	:= n
  endif
+ ifndef M154X
+  M145X		:= n
+ endif
  ifndef MGA
   MGA		:= n
  endif