diff --git a/src/include/86box/cdrom.h b/src/include/86box/cdrom.h
index fb157ba66..00eba5b44 100644
--- a/src/include/86box/cdrom.h
+++ b/src/include/86box/cdrom.h
@@ -239,7 +239,8 @@ static const struct cdrom_drive_types_s {
     { "MATSHITA", "CR-562",           "0.75", "cr562",          BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
     { "MATSHITA", "CR-562",           "0.76", "cr562_076",      BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
     { "MATSHITA", "CR-562",           "0.80", "cr562_080",      BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
-    { "MATSHITA", "CR-563",           "0.75", "cr563",          BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
+    { "MATSHITA", "CR-563",           "0.74", "cr563",          BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
+    { "MATSHITA", "CR-563",           "0.75", "cr563_075",      BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
     { "MATSHITA", "CR-563",           "0.80", "cr563_080",      BUS_TYPE_MKE , 0,  2,  0, 0, 0, { -1, -1, -1, -1 } },
     { "",         "",                 "",     "",               BUS_TYPE_NONE, 0, -1,  0, 0, 0, { -1, -1, -1, -1 } }
 };
diff --git a/src/machine/machine_table.c b/src/machine/machine_table.c
index de3d2a88c..56f105997 100644
--- a/src/machine/machine_table.c
+++ b/src/machine/machine_table.c
@@ -11250,8 +11250,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_ACER | 0x00004200,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x004008f0,
@@ -11297,8 +11297,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_AMI | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,
@@ -11344,8 +11344,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_AMI | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,
@@ -11391,8 +11391,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_VIA | 0x00424600,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,
@@ -11438,8 +11438,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_AMI | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x000004f0,
@@ -11486,8 +11486,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_HOLTEK | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,
@@ -11534,8 +11534,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_HOLTEK | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,
@@ -11582,8 +11582,8 @@ const machine_t machines[] = {
         .default_jumpered_ecp_dma = 3,
         .kbc_device               = &kbc_at_device,
         .kbc_params               = KBC_VEN_AMI | 0x00004800,
-        .nvr_device               = &nvr_at_device,
-        .nvr_params               = NVR_AT,
+        .nvr_device               = NULL,
+        .nvr_params               = 0x00000000,
         .sio_device               = NULL,
         .sio_params               = 0x00000000,
         .kbc_p1                   = 0x00000cf0,