diff --git a/src/machine/m_at_socket1.c b/src/machine/m_at_socket1.c
index 563227f2e..7bb69d368 100644
--- a/src/machine/m_at_socket1.c
+++ b/src/machine/m_at_socket1.c
@@ -294,11 +294,13 @@ machine_at_vect486vl_init(const machine_t *model) // has HDC problems
     int ret;
 
     ret = bios_load_linear("roms/machines/vect486vl/aa0500.ami",
-                           0x000e0000, 131072, 0);
+                           0x000c0000, 262144, 0);
 
     if (bios_only || !ret)
         return ret;
 
+    memcpy(&rom[0x00020000], rom, 131072);
+
     if (gfxcard[0] == VID_INTERNAL)
         device_add(machine_get_vid_device(machine));
 
@@ -311,6 +313,15 @@ machine_at_vect486vl_init(const machine_t *model) // has HDC problems
     device_add(&ide_isa_device);
     device_add_params(&fdc37c6xx_device, (void *) (FDC37C651 | FDC37C6XX_IDE_PRI));
 
+    video_reset(gfxcard[0]);
+
+    if (gfxcard[0] != VID_INTERNAL) {
+        for (uint16_t i = 0; i < 32768; i++)
+            rom[i] = mem_readb_phys(0x000c0000 + i);
+    }
+    mem_mapping_set_addr(&bios_mapping, 0x0c0000, 0x40000);
+    mem_mapping_set_exec(&bios_mapping, rom);
+
     return ret;
 }
 
@@ -321,11 +332,13 @@ machine_at_d824_init(const machine_t *model)
     int ret;
 
     ret = bios_load_linear("roms/machines/d824/fts-biosupdated824noflashbiosepromv320-320334-160.bin",
-                           0x000e0000, 131072, 0);
+                           0x000c0000, 262144, 0);
 
     if (bios_only || !ret)
         return ret;
 
+    memcpy(&rom[0x00020000], rom, 131072);
+
     if (gfxcard[0] == VID_INTERNAL)
         device_add(machine_get_vid_device(machine));
 
@@ -342,6 +355,15 @@ machine_at_d824_init(const machine_t *model)
     device_add(&ide_isa_device);
     device_add_params(&fdc37c6xx_device, (void *) FDC37C651);
 
+    video_reset(gfxcard[0]);
+
+    if (gfxcard[0] != VID_INTERNAL) {
+        for (uint16_t i = 0; i < 32768; i++)
+            rom[i] = mem_readb_phys(0x000c0000 + i);
+    }
+    mem_mapping_set_addr(&bios_mapping, 0x0c0000, 0x40000);
+    mem_mapping_set_exec(&bios_mapping, rom);
+
     return ret;
 }
 
diff --git a/src/video/vid_cl54xx.c b/src/video/vid_cl54xx.c
index ae2da7e15..edf49fe88 100644
--- a/src/video/vid_cl54xx.c
+++ b/src/video/vid_cl54xx.c
@@ -54,8 +54,6 @@
 #define BIOS_GD5428_ISA_PATH            "roms/video/cirruslogic/5428.bin"
 #define BIOS_GD5428_MCA_PATH            "roms/video/cirruslogic/SVGA141.ROM"
 #define BIOS_GD5428_ONBOARD_ACER_PATH   "roms/machines/acera1g/4alo001.bin"
-#define BIOS_GD5428_ONBOARD_HP_PATH     "roms/machines/vect486vl/aa0500.ami"
-#define BIOS_GD5428_ONBOARD_SNI_PATH    "roms/machines/d824/fts-biosupdated824noflashbiosepromv320-320334-160.bin"
 #define BIOS_GD5428_PATH                "roms/video/cirruslogic/vlbusjapan.BIN"
 #define BIOS_GD5428_BOCA_ISA_PATH_1     "roms/video/cirruslogic/boca_gd5428_1.30b_1.bin"
 #define BIOS_GD5428_BOCA_ISA_PATH_2     "roms/video/cirruslogic/boca_gd5428_1.30b_2.bin"
@@ -4317,10 +4315,7 @@ gd54xx_init(const device_t *info)
 
         case CIRRUS_ID_CLGD5426:
             if (info->local & 0x200)
-                if (machines[machine].init == machine_at_vect486vl_init)
-                    romfn = BIOS_GD5428_ISA_PATH;
-                else
-                    romfn = NULL;
+                romfn = NULL;
             else {
                 if (info->local & 0x100)
                     romfn = BIOS_GD5426_DIAMOND_A1_ISA_PATH;
@@ -4337,9 +4332,7 @@ gd54xx_init(const device_t *info)
 
         case CIRRUS_ID_CLGD5428:
             if (info->local & 0x200) {
-                if (machines[machine].init == machine_at_d824_init)
-                    romfn = BIOS_GD5428_ISA_PATH;
-                else if (machines[machine].init == machine_at_acera1g_init)
+                if (machines[machine].init == machine_at_acera1g_init)
                     romfn = BIOS_GD5428_ONBOARD_ACER_PATH;
                 else
                     romfn            = NULL;