diff --git a/.gitmodules b/.gitmodules
index 9872978..11558bf 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -13,7 +13,3 @@
 	path = 2xrsa
 	url = https://github.com/b1l1s/2xrsa.git
 	ignore = dirty
-[submodule "firmtool"]
-	path = firmtool
-	url = https://github.com/TuxSH/firmtool.git
-	ignore = dirty
diff --git a/Makefile b/Makefile
index f50e5b9..478de9f 100644
--- a/Makefile
+++ b/Makefile
@@ -120,7 +120,7 @@ binary: common
 	@make --no-print-directory -C $(BUILD) -f $(CURDIR)/Makefile
 
 firm: binary
-	@firmtool/firmtool build $(OUTPUT).firm -n 0x23F00000 -e 0 -D $(OUTPUT).bin -A 0x23F00000 -C NDMA -i
+	@firmtool build $(OUTPUT).firm -n 0x23F00000 -e 0 -D $(OUTPUT).bin -A 0x23F00000 -C NDMA -i
 
 gateway: binary
 	@cp resources/LauncherTemplate.dat $(OUTPUT_D)/Launcher.dat
diff --git a/firmtool b/firmtool
deleted file mode 160000
index 375e66c..0000000
--- a/firmtool
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 375e66c946968c8d39258b01038817a628b88e89
diff --git a/source/common/ui.h b/source/common/ui.h
index 60b78e0..5548544 100644
--- a/source/common/ui.h
+++ b/source/common/ui.h
@@ -52,8 +52,10 @@
 #define COLOR_STD_BG        COLOR_BLACK
 #define COLOR_STD_FONT      COLOR_WHITE
 
-#define TOP_SCREEN          (u8*)(*(u32*)0x23FFFE00)
-#define BOT_SCREEN          (u8*)(*(u32*)0x23FFFE08)
+#define TOP_SCREEN          top_screen
+#define BOT_SCREEN          bottom_screen
+
+extern u8 *top_screen, *bottom_screen;
 
 void ClearScreen(unsigned char *screen, int color);
 void ClearScreenF(bool clear_top, bool clear_bottom, int color);
diff --git a/source/main.c b/source/main.c
index 0594024..993aeb0 100644
--- a/source/main.c
+++ b/source/main.c
@@ -11,8 +11,21 @@ void Reboot()
 }
 
 
-int main()
+u8 *top_screen, *bottom_screen;
+
+void main(int argc, char** argv)
 {
+    // Fetch the framebuffer addresses
+    if(argc >= 2) {
+        // newer entrypoints
+        u8 **fb = (u8 **)(void *)argv[1];
+        top_screen = fb[0];
+        bottom_screen = fb[2];
+    } else {
+        // outdated entrypoints
+        top_screen = (u8*)(*(u32*)0x23FFFE00);
+        bottom_screen = (u8*)(*(u32*)0x23FFFE08);
+    }
     ClearScreenF(true, true, COLOR_STD_BG);
     u32 ret = SafeB9SInstaller();
     ShowInstallerStatus(); // update installer status one last time
@@ -21,5 +34,4 @@ int main()
     ClearScreenF(true, true, COLOR_STD_BG);
     fs_deinit();
     Reboot();
-    return 0;
 }
diff --git a/source/start.s b/source/start.s
index 0863a68..8679a27 100644
--- a/source/start.s
+++ b/source/start.s
@@ -65,6 +65,13 @@ _start_gw:
     stmia r0, {r1,r2,r3}
     @ framebuffers properly set
 
+    ldr r3, =0xFFFF0830         @ flush (clean & invalidate) entire dcache b9 func
+    blx r3
+
+    mov r3, #0
+    mcr p15, 0, r3, c7, c5, 0   @ invalidate I-cache
+
+    mov r2, #0
     ldr r3, .entry
     bx r3
 
@@ -74,8 +81,18 @@ _start_gw:
 .entry:   .word 0x23F00000
 
 _skip_gw:
+    mov r9, r0      @ argc
+    mov r10, r1     @ argv
+
+    ldr r4, =0xBEEF
+    lsl r2, #16
+    lsr r2, #16
+    cmp r2, r4      @ magic word
+    movne r9, #0
+
     @ Disable caches / mpu
     mrc p15, 0, r4, c1, c0, 0  @ read control register
+    bic r4, #(1<<16)           @ - dtcm disable (mandated by the docs, before you change the dtcm's address)
     bic r4, #(1<<12)           @ - instruction cache disable
     bic r4, #(1<<2)            @ - data cache disable
     bic r4, #(1<<0)            @ - mpu disable
@@ -91,10 +108,10 @@ _skip_gw:
         strlt r2, [r0], #4
         blt .bss_clr
 
-    @ Flush caches
+    @ Invalidate caches
     mov r5, #0
-    mcr p15, 0, r5, c7, c5, 0  @ flush I-cache
-    mcr p15, 0, r5, c7, c6, 0  @ flush D-cache
+    mcr p15, 0, r5, c7, c5, 0  @ invalidate I-cache
+    mcr p15, 0, r5, c7, c6, 0  @ invalidate D-cache
     mcr p15, 0, r5, c7, c10, 4 @ drain write buffer
 
     @ Give read/write access to all the memory regions
@@ -142,9 +159,10 @@ _skip_gw:
     mov r1, #0x340
     str r1, [r0]
 
-    mov sp, #0x27000000
+    ldr sp, =0x23F00000
 
-    blx main
-    b _start
+    mov r0, r9
+    mov r1, r10
+    b main
 
 .pool