diff --git a/cube/patches/alt/blockdevice.c b/cube/patches/alt/blockdevice.c
index 45c02b08..6b94394f 100644
--- a/cube/patches/alt/blockdevice.c
+++ b/cube/patches/alt/blockdevice.c
@@ -17,6 +17,7 @@ bool exi_trylock(int32_t chan, uint32_t dev, EXIControl *exi)
 	return true;
 }
 
+void di_update_interrupts(void);
 void di_complete_transfer(void);
 
 void perform_read(uint32_t offset, uint32_t length, uint32_t address)
@@ -44,5 +45,21 @@ void trickle_read(void)
 		*(uint8_t **)VAR_TMP1 = data + data_size;
 
 		if (!remainder) di_complete_transfer();
+	} else if (*(uint32_t *)VAR_DISC_CHANGING) {
+		tb_t end;
+		mftb(&end);
+
+		if (tb_diff_usec(&end, (tb_t *)VAR_TIMER_START) > 1000000) {
+			if (*(uint32_t *)VAR_CUR_DISC_LBA == *(uint32_t *)VAR_DISC_1_LBA)
+				*(uint32_t *)VAR_CUR_DISC_LBA  = *(uint32_t *)VAR_DISC_2_LBA;
+			else
+				*(uint32_t *)VAR_CUR_DISC_LBA  = *(uint32_t *)VAR_DISC_1_LBA;
+
+			*(uint32_t *)VAR_DISC_CHANGING = 0;
+
+			(*DI_EMU)[1] &= ~0b001;
+			(*DI_EMU)[1] |=  0b100;
+			di_update_interrupts();
+		}
 	}
 }
diff --git a/cube/patches/alt/emulator.c b/cube/patches/alt/emulator.c
index 86cb90ab..952d75e4 100644
--- a/cube/patches/alt/emulator.c
+++ b/cube/patches/alt/emulator.c
@@ -26,7 +26,7 @@ void di_complete_transfer(void)
 	uint32_t address = (*DI_EMU)[5] + OS_BASE_CACHED;
 	uint32_t length  = (*DI_EMU)[6];
 
-	(*DI_EMU)[0] |= 0b0010000;
+	(*DI_EMU)[0] |=  0b0010000;
 	(*DI_EMU)[7] &= ~0b001;
 
 	if ((*DI_EMU)[7] & 0b010) {
@@ -51,7 +51,7 @@ static void di_execute_command(void)
 
 				perform_read(offset, length, address);
 			} else {
-				(*DI_EMU)[0] |= 0b0000100;
+				(*DI_EMU)[0] |=  0b0000100;
 				(*DI_EMU)[7] &= ~0b001;
 				di_update_interrupts();
 			}
@@ -63,6 +63,12 @@ static void di_execute_command(void)
 				result = 0x01023A00;
 			break;
 		}
+		case 0xE3:
+		{
+			(*DI_EMU)[1] |= 0b001;
+			mftb((tb_t *)VAR_TIMER_START);
+			*(uint32_t *)VAR_DISC_CHANGING = 1;
+		}
 	}
 
 	(*DI_EMU)[8] = result;
diff --git a/cube/swiss/source/gcm.c b/cube/swiss/source/gcm.c
index 2120d891..513e0744 100644
--- a/cube/swiss/source/gcm.c
+++ b/cube/swiss/source/gcm.c
@@ -188,7 +188,7 @@ int parse_gcm(file_handle *file, ExecutableFile *filesToPatch) {
 	free(FST);
 	
 	// Multi-DOL games may re-load the main DOL, so make sure we patch it too.
-	if((devices[DEVICE_CUR]->features & FEAT_CAN_HOLD_PATCHES) || numFiles > 0) {
+	if((devices[DEVICE_CUR]->features & FEAT_REPLACES_DVD_FUNCS) || numFiles > 0) {
 		DOLHEADER dolhdr;
 		u32 main_dol_size = 0;
 		// Calc size