diff --git a/src/machine/machine_at_430hx.c b/src/machine/machine_at_430hx.c
index ca110dd60..e30e57036 100644
--- a/src/machine/machine_at_430hx.c
+++ b/src/machine/machine_at_430hx.c
@@ -130,6 +130,10 @@ static void i430hx_write(int func, int addr, uint8_t val, void *priv)
                 if ((card_i430hx[0x5f] ^ val) & 0xf0)
                         i430hx_map(0xec000, 0x04000, val >> 4);
                 break;
+		case 0x72: /*SMRAM*/
+                if ((card_i430hx[0x72] ^ val) & 0x48)
+                        i430hx_map(0xa0000, 0x20000, ((val & 0x48) == 0x48) ? 3 : 0);
+		break;
         }
                 
         card_i430hx[addr] = val;
@@ -171,6 +175,7 @@ static void i430hx_reset(void)
 static void i430hx_pci_reset(void)
 {
 	i430hx_write(0, 0x59, 0x00, NULL);
+	i430hx_write(0, 0x72, 0x02, NULL);
 }
 
 
diff --git a/src/machine/machine_at_430vx.c b/src/machine/machine_at_430vx.c
index 54171e2a4..d2378673c 100644
--- a/src/machine/machine_at_430vx.c
+++ b/src/machine/machine_at_430vx.c
@@ -133,6 +133,10 @@ static void i430vx_write(int func, int addr, uint8_t val, void *priv)
                         i430vx_map(0xec000, 0x04000, val >> 4);
                 /* pclog("i430vx_write : PAM6 write %02X\n", val); */
                 break;
+		case 0x72: /*SMRAM*/
+                if ((card_i430vx[0x72] ^ val) & 0x48)
+                        i430vx_map(0xa0000, 0x20000, ((val & 0x48) == 0x48) ? 3 : 0);
+		break;
         }
                 
         card_i430vx[addr] = val;
@@ -174,6 +178,7 @@ static void i430vx_reset(void)
 static void i430vx_pci_reset(void)
 {
 	i430vx_write(0, 0x59, 0x00, NULL);
+	i430vx_write(0, 0x72, 0x02, NULL);
 }
 
 
diff --git a/src/machine/machine_at_440fx.c b/src/machine/machine_at_440fx.c
index fcb579111..5858f798f 100644
--- a/src/machine/machine_at_440fx.c
+++ b/src/machine/machine_at_440fx.c
@@ -130,6 +130,10 @@ static void i440fx_write(int func, int addr, uint8_t val, void *priv)
                 if ((card_i440fx[0x5f] ^ val) & 0xf0)
                         i440fx_map(0xec000, 0x04000, val >> 4);
                 break;
+		case 0x72: /*SMRAM*/
+                if ((card_i440fx[0x72] ^ val) & 0x48)
+                        i440fx_map(0xa0000, 0x20000, ((val & 0x48) == 0x48) ? 3 : 0);
+		break;
         }
                 
         card_i440fx[addr] = val;
@@ -175,6 +179,7 @@ static void i440fx_reset(void)
 static void i440fx_pci_reset(void)
 {
 	i440fx_write(0, 0x59, 0x00, NULL);
+	i440fx_write(0, 0x72, 0x02, NULL);
 }
 
 
diff --git a/src/video/vid_cga.c b/src/video/vid_cga.c
index 384a0a5c5..b1e79d764 100644
--- a/src/video/vid_cga.c
+++ b/src/video/vid_cga.c
@@ -107,9 +107,6 @@ uint8_t cga_in(uint16_t addr, void *p)
 void cga_write(uint32_t addr, uint8_t val, void *p)
 {
         cga_t *cga = (cga_t *)p;
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
 
         cga->vram[addr & 0x3fff] = val;
         if (cga->snow_enabled)
diff --git a/src/video/vid_hercules.c b/src/video/vid_hercules.c
index 0329c9b7a..c2f415d29 100644
--- a/src/video/vid_hercules.c
+++ b/src/video/vid_hercules.c
@@ -114,9 +114,6 @@ void hercules_write(uint32_t addr, uint8_t val, void *p)
 {
         hercules_t *hercules = (hercules_t *)p;
         egawrites++;
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
 //        pclog("Herc write %08X %02X\n",addr,val);
         hercules->vram[addr & 0xffff] = val;
 }
diff --git a/src/video/vid_herculesplus.c b/src/video/vid_herculesplus.c
index c9ef61bd9..84c0d1ea3 100644
--- a/src/video/vid_herculesplus.c
+++ b/src/video/vid_herculesplus.c
@@ -148,10 +148,6 @@ void herculesplus_write(uint32_t addr, uint8_t val, void *p)
 
         egawrites++;
 
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
-
 	addr &= 0xFFFF;
 
 	herculesplus->vram[addr] = val;
diff --git a/src/video/vid_incolor.c b/src/video/vid_incolor.c
index 6fdee5417..0d860510c 100644
--- a/src/video/vid_incolor.c
+++ b/src/video/vid_incolor.c
@@ -266,10 +266,6 @@ void incolor_write(uint32_t addr, uint8_t val, void *p)
 
         egawrites++;
 
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
-
 	addr &= 0xFFFF;
 
 	/* In text mode, writes to the bottom 16k always touch all 4 planes */
diff --git a/src/video/vid_mda.c b/src/video/vid_mda.c
index 942425cda..7fefcb33b 100644
--- a/src/video/vid_mda.c
+++ b/src/video/vid_mda.c
@@ -102,9 +102,6 @@ void mda_write(uint32_t addr, uint8_t val, void *p)
 {
         mda_t *mda = (mda_t *)p;
         egawrites++;
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
         mda->vram[addr & 0xfff] = val;
 }
 
diff --git a/src/video/vid_paradise.c b/src/video/vid_paradise.c
index 744341afc..04d69180d 100644
--- a/src/video/vid_paradise.c
+++ b/src/video/vid_paradise.c
@@ -253,9 +253,6 @@ void paradise_write(uint32_t addr, uint8_t val, void *p)
         paradise_t *paradise = (paradise_t *)p;
         addr = (addr & 0x7fff) + paradise->write_bank[(addr >> 15) & 3];
 
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
         svga_write_linear(addr, val, &paradise->svga);
 }
 
diff --git a/src/video/vid_svga.c b/src/video/vid_svga.c
index 27e61cbc4..f72bf1dfd 100644
--- a/src/video/vid_svga.c
+++ b/src/video/vid_svga.c
@@ -1044,10 +1044,6 @@ void svga_write(uint32_t addr, uint8_t val, void *p)
         uint8_t vala, valb, valc, vald, wm = svga->writemask;
         int writemask2 = svga->writemask;
 
-	/* Horrible hack, I know, but it's the only way to fix the 440FX BIOS filling the VRAM with garbage until Tom fixes the memory emulation. */
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF2F) && (romset == ROM_440FX))  return;
-	if ((cs == 0xE0000) && (cpu_state.pc == 0xBF77) && (romset == ROM_440FX))  return;
-
         egawrites++;
 
         cycles -= video_timing_b;