diff --git a/include/functions.h b/include/functions.h
index 63877dfe..a55ea05f 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -9,6 +9,9 @@ extern s32 func_8005A990(OSPiHandle *);
 // bcopy.s
 extern void _bcopy(void *, void *, u32);
 
+// 3640.s
+extern void* func_80002AF8(s32, void*);
+
 // 3A80.s
 extern void func_80002F58(void);
 extern void *func_80002FDC(s32);
@@ -31,6 +34,9 @@ extern void func_800057C0(void);
 // 6BC0.s
 extern u32 func_80006314(s32, s32, s32, s32, s32); // types unknown
 
+// 75F0.s
+extern void func_80008154(s32, s32, char*, ...);
+
 // 9D20.s
 extern void func_80009120(s32);
 
diff --git a/splat.yaml b/splat.yaml
index 257dc4d5..61a2e490 100644
--- a/splat.yaml
+++ b/splat.yaml
@@ -38,7 +38,7 @@ segments:
     - [0x28E0, c, memmap]
     - [0x2EC0, c, intro_loader] # intro loader
     - [0x3640, asm] #
-    - [0x3A80, asm] # transition loader
+    - [0x3A80, c]
     - [0x3FB0, asm] # PRES-JPEG decoder
     - [0x5580, asm] # there's a split here according to PAL
     - [0x60A0, asm] # 
@@ -352,7 +352,7 @@ segments:
     # Start of .rodata
     - [0x7BAC0, .rodata, rsp]
     - [0x7BB10, rodata, rom_rodata_7BB10]
-    - [0x7BB20, rodata, rom_rodata_7BB20]
+    - [0x7BB20, .rodata, 3A80]
     - [0x7BB50, rodata, rom_rodata_7BB50]
     - [0x7BBE0, .rodata, crash_screen]
     - [0x7BFA0, rodata, rom_rodata_7BFA0]
diff --git a/src/3A80.c b/src/3A80.c
new file mode 100644
index 00000000..d495e644
--- /dev/null
+++ b/src/3A80.c
@@ -0,0 +1,119 @@
+#include <ultra64.h>
+#include "memmap.h"
+#include "intro_loader.h"
+
+extern s32 D_80068B90;
+extern u8 D_80104BB0[];
+extern s32 D_800A60B0;
+
+uintptr_t func_80002E80(uintptr_t addr) {
+    uintptr_t retaddr = 0x00000000;
+
+    if (addr < (size_t) osMemSize) {
+        retaddr = addr | 0x80000000;
+    } else if (addr < 0x10000000U) {
+        retaddr = Memmap_GetSegmentVaddr(addr);
+    } else if ((addr >= 0x81000000U) && (addr < 0x90000000U)) { // is the address in fragment space? convert it to its post-relocated address.
+        retaddr = Memmap_GetFragmentVaddr(addr);
+    } else if ((addr >= 0x80000000U) && (addr < (uintptr_t) (osMemSize + 0x80000000U))) {
+        retaddr = addr;
+    }
+    return retaddr;
+}
+
+// HAL memcpy?
+void func_80002F28(u32* dest, u32* src, int size) {
+    while (size --> 0) {
+        *(dest++) = *(src++);
+    }
+}
+
+void func_80002F58(void) {
+    // wat? mem sizes are only ever 0x400000 or 0x800000. This check makes no sense.
+    if ((D_80068B90 != 0) && ((u32) osMemSize > 0x600000U)) {
+        func_800022C0(&D_80104BB0, 0x80600000);
+    } else {
+        func_800022C0(&D_80104BB0, 0x80400000);
+        D_80068B90 = 0;
+    }
+    func_80003860();
+    D_800A60B0 = func_80002A40(0x10000, 0);
+}
+
+void *func_80002FDC(s32 arg0) {
+    return func_80002AF8(D_800A60B0, arg0);
+}
+
+void func_80003004(void *arg0) {
+    func_80002BD0(D_800A60B0, arg0);
+}
+
+// HAL_DrawRect
+void func_8000302C(Gfx** dlist, s32 ulx, s32 lrx, u16 color) {
+    s32 uly = 0xF;
+    s32 lry = 0x11;
+    Gfx *gfx = *dlist;
+
+    if (func_80007A58() != 0) {
+        ulx <<= 1;
+        lrx <<= 1;
+        uly <<= 1;
+        lry <<= 1;
+    }
+
+    gDPPipeSync(gfx++);
+    gDPSetFillColor(gfx++, color << 16 | color);
+    gDPFillRectangle(gfx++, ulx, uly, lrx, lry);
+    *dlist = gfx;
+}
+
+void func_8000310C(Gfx** dlist) 
+{
+    struct Unk800A6070 * sp54 = func_80002A30();
+    s32 temp_s1 = func_80002764() - D_80068B90;
+
+    if (temp_s1 >= 0) 
+    {
+        u32 coord = 0x1E;
+        s32 sp48 = ((u32) ( K0_TO_PHYS(sp54->unk20)) >> 0xF) + coord;
+        s32 sp44 = ((u32) ( K0_TO_PHYS(sp54->unk28)) >> 0xF) + coord;
+        s32 sp40 = ((u32) ( K0_TO_PHYS(sp54->unk2C) - D_80068B90) >> 0xF) + coord;
+        s32 sp3C = ((u32) ( K0_TO_PHYS(sp54->unk24) - D_80068B90) >> 0xF) + coord;
+
+        func_8000302C(dlist, coord, sp48, 0xFBCB);
+        func_8000302C(dlist, sp48, sp44, 0xFFCB);
+        func_8000302C(dlist, sp44, sp40, 0x2ABF);
+        func_8000302C(dlist, sp40, sp3C, 0xFFCB);
+        func_80008154(coord, 0x14, "MEM: +%XH (+%dK)",  temp_s1, temp_s1 / 1024);
+    }
+    else
+    {
+        u32 coord = 0x1E;
+        s32 sp34 = ((u32) ( K0_TO_PHYS(sp54->unk20)) >> 0xF) + coord;
+        s32 sp30 = ((u32) ( K0_TO_PHYS(sp54->unk28)) >> 0xF) + coord;
+        s32 sp2C = ((u32) ( K0_TO_PHYS(sp54->unk2C) - D_80068B90) >> 0xF) + coord;
+        s32 sp28 = ((u32) ( K0_TO_PHYS(sp54->unk24) - D_80068B90) >> 0xF) + coord;
+        func_8000302C(dlist, coord, sp34, 0xFBCB);
+        func_8000302C(dlist, sp34, sp2C, 0xFFCB);
+        func_8000302C(dlist, sp2C, sp30, 0xF94B);
+        func_8000302C(dlist, sp30, sp28, 0xFFCB);
+        func_80008154(coord, 0x14, "MEM: -%XH (-%dK)", -temp_s1, -temp_s1 / 1024);
+    }
+}
+
+void func_8000330C(u64 * dest, u32 arg1) {
+    while( arg1 --> 0 ) {
+        *(dest++) = -1;
+    }
+}
+
+s32 func_80003348(u64* arg0) 
+{
+    s32 ret = 0;
+
+    while (*(arg0++) == 0x8040000080400000)
+    {   
+        ret++;
+    }
+    return ret * sizeof(*arg0);
+}
diff --git a/tools/symbol_addrs.txt b/tools/symbol_addrs.txt
index 4ec1fb40..0882c782 100644
--- a/tools/symbol_addrs.txt
+++ b/tools/symbol_addrs.txt
@@ -549,4 +549,6 @@ D_87906094 = 0x87906094;
 D_87906098 = 0x87906098;
 D_879060A4 = 0x879060A4;
 D_879060C4 = 0x879060C4;
-D_879060C8 = 0x879060C8;
\ No newline at end of file
+D_879060C8 = 0x879060C8;
+gShowCPUProfiler = 0x80068BC0;
+gShowMEMProfiler = 0x80068BC4;
diff --git a/undefined_syms.txt b/undefined_syms.txt
index 2c6b7362..c6ce22c9 100644
--- a/undefined_syms.txt
+++ b/undefined_syms.txt
@@ -12,3 +12,5 @@ piThreadStack = 0x801026D0;
 LEOZONE_OUTERCYL_TBL = 0x8007DD08;
 LEOinterruptThreadStack = 0x80100638;
 .L8120A860 = 0x8120A860;
+gShowCPUProfiler = 0x80068BC0;
+gShowMEMProfiler = 0x80068BC4;