diff --git a/iop/atad_emu/src/ps2atad.c b/iop/atad_emu/src/ps2atad.c
index 0f7ef5e..d1cc0e3 100644
--- a/iop/atad_emu/src/ps2atad.c
+++ b/iop/atad_emu/src/ps2atad.c
@@ -39,7 +39,7 @@ ata_devinfo_t *ata_get_devinfo(int device)
 
     if (device == 0 && dev[0].exists == 0) {
         // Initialize
-        u32 size = fhi_size(1);
+        u32 size = fhi_size(FHI_FID_ATA0);
         if (size > 0) {
             M_PRINTF("(%d) size = %d sectors\n", device, size);
             dev[0].exists          = 1;
@@ -86,10 +86,10 @@ int ata_device_sector_io(int device, void *buf, u32 lba, u32 nsectors, int dir)
     M_PRINTF("(%d, 0x%x, %d, %d, %d)\n", device, buf, lba, nsectors, dir);
 
     if (dir == ATA_DIR_WRITE) {
-        fhi_write(1, buf, lba, nsectors);
+        fhi_write(FHI_FID_ATA0, buf, lba, nsectors);
         return 0;
     } else {
-        fhi_read(1, buf, lba, nsectors);
+        fhi_read(FHI_FID_ATA0, buf, lba, nsectors);
         return 0;
     }
 
diff --git a/iop/cdvdman_emu/src/device-fhi.c b/iop/cdvdman_emu/src/device-fhi.c
index 607f6df..510eedd 100644
--- a/iop/cdvdman_emu/src/device-fhi.c
+++ b/iop/cdvdman_emu/src/device-fhi.c
@@ -35,7 +35,7 @@ void DeviceFSInit(void)
     DPRINTF("Waiting for device...\n");
 
     while (1) {
-        iso_size = fp_fhi_size(0);
+        iso_size = fp_fhi_size(FHI_FID_CDVD);
         if (iso_size > 0)
             break;
         DelayThread(100 * 1000); // 100ms
diff --git a/iop/common/fhi.h b/iop/common/fhi.h
index 80fe939..22913bb 100644
--- a/iop/common/fhi.h
+++ b/iop/common/fhi.h
@@ -8,6 +8,12 @@
 #include <stdint.h>
 #include <irx.h>
 
+#define FHI_FID_CDVD    0
+#define FHI_FID_ATA0    1
+#define FHI_FID_ATA1    2
+#define FHI_FID_MC0     3
+#define FHI_FID_MC1     4
+
 // Size of the file in SECTORS of 512b
 uint32_t fhi_size(int file_handle);
 // Read SECTORS from file
diff --git a/iop/common/fhi_bdm.h b/iop/common/fhi_bdm.h
index 120883a..e07efeb 100644
--- a/iop/common/fhi_bdm.h
+++ b/iop/common/fhi_bdm.h
@@ -8,7 +8,7 @@
 
 
 #define MODULE_SETTINGS_MAGIC 0xf1f2f3f4
-#define BDM_MAX_FILES 4
+#define BDM_MAX_FILES 5
 #define BDM_MAX_FRAGS 64 // 64 * 12bytes = 768bytes
 
 struct fhi_bdm_fragfile
diff --git a/iop/mc_emu/src/mcemu.c b/iop/mc_emu/src/mcemu.c
index fec8779..42cd3bf 100644
--- a/iop/mc_emu/src/mcemu.c
+++ b/iop/mc_emu/src/mcemu.c
@@ -668,7 +668,7 @@ int MceEraseBlock(MemoryCard *mcd, int page)
     memset(mcd->dbufp, r, mcd->cspec.PageSize);
 
     for (i = 0; i < mcd->cspec.BlockSize; i++) {
-        r = fhi_write(mcd->mcnum + 3, mcd->dbufp, page + i, 1);
+        r = fhi_write(FHI_FID_MC0 + mcd->mcnum, mcd->dbufp, page + i, 1);
         if (!r) {
             DPRINTF("erase error\n");
             return 0;
@@ -686,7 +686,7 @@ static int do_read(MemoryCard *mcd)
     r = (mcd->flags & 0x10) ? 0xFF : 0x0;
     memset(mcd->cbufp, r, 0x10);
 
-    r = fhi_read(mcd->mcnum + 3, mcd->dbufp, mcd->rpage, 1);
+    r = fhi_read(FHI_FID_MC0 + mcd->mcnum, mcd->dbufp, mcd->rpage, 1);
     if (!r) {
         DPRINTF("read error\n");
         return 0;
@@ -788,7 +788,7 @@ int MceWrite(MemoryCard *mcd, void *buf, u32 size)
         size = tot_size - size;
         mcd->wroff = 0;
 
-        r = fhi_write(mcd->mcnum + 3, mcd->dbufp, mcd->wpage, 1);
+        r = fhi_write(FHI_FID_MC0 + mcd->mcnum, mcd->dbufp, mcd->wpage, 1);
         if (!r) {
             DPRINTF("write error.\n");
             return 0;