diff --git a/spec b/spec
index 4612c18015..f7ef96aef6 100644
--- a/spec
+++ b/spec
@@ -108,7 +108,6 @@ beginseg
     include "build/src/libultra/os/stoptimer.o"
     include "build/asm/boot/probetlb.text.o"
     include "build/src/libultra/io/pimgr.o"
-    include "build/data/boot/pimgr.data.o"
     include "build/src/libultra/io/piacs.o"
     pad_text
     include "build/src/libultra/io/devmgr.o"
@@ -185,7 +184,7 @@ beginseg
     include "build/src/libultra/voice/voicegetstatus.o"
     include "build/src/libultra/io/cartrominit.o"
     include "build/src/libultra/gu/guS2DInitBg.o"
-    include "build/data/boot/guS2DInitBg.data.o"
+    include "build/data/boot/vimodefpallan1.data.o"
     include "build/src/libultra/io/pfsselectbank.o"
     include "build/src/libultra/io/contsetch.o"
     include "build/asm/boot/setfpccsr.text.o"
diff --git a/src/libultra/io/pimgr.c b/src/libultra/io/pimgr.c
index 7bbb893439..3ba971007a 100644
--- a/src/libultra/io/pimgr.c
+++ b/src/libultra/io/pimgr.c
@@ -1,14 +1,16 @@
 #include "global.h"
 #include "stack.h"
 
-OSPiHandle __Dom1SpeedParam;
-OSPiHandle __Dom2SpeedParam;
+OSPiHandle __Dom1SpeedParam ALIGNED8;
+OSPiHandle __Dom2SpeedParam ALIGNED8;
 OSThread sPiMgrThread;
 STACK(sPiMgrStack, 0x1000);
-OSMesgQueue D_8009E3D0;
-OSMesg D_8009E3E8[1];
+OSMesgQueue piEventQueue ALIGNED8;
+OSMesg piEventBuf[1];
 
-// TODO: migrate data
+OSDevMgr __osPiDevMgr = { 0 };
+OSPiHandle* __osPiTable = NULL;
+OSPiHandle* __osCurrentHandle[2] ALIGNED8 = { &__Dom1SpeedParam, &__Dom2SpeedParam };
 
 void osCreatePiManager(OSPri pri, OSMesgQueue* cmdQ, OSMesg* cmdBuf, s32 cmdMsgCnt) {
     u32 savedMask;
@@ -17,11 +19,11 @@ void osCreatePiManager(OSPri pri, OSMesgQueue* cmdQ, OSMesg* cmdBuf, s32 cmdMsgC
 
     if (!__osPiDevMgr.active) {
         osCreateMesgQueue(cmdQ, cmdBuf, cmdMsgCnt);
-        osCreateMesgQueue(&D_8009E3D0, D_8009E3E8, ARRAY_COUNT(D_8009E3E8));
+        osCreateMesgQueue(&piEventQueue, piEventBuf, ARRAY_COUNT(piEventBuf));
         if (!__osPiAccessQueueEnabled) {
             __osPiCreateAccessQueue();
         }
-        osSetEventMesg(OS_EVENT_PI, &D_8009E3D0, (OSMesg)0x22222222);
+        osSetEventMesg(OS_EVENT_PI, &piEventQueue, (OSMesg)0x22222222);
         oldPri = -1;
         myPri = osGetThreadPri(NULL);
         if (myPri < pri) {
@@ -32,7 +34,7 @@ void osCreatePiManager(OSPri pri, OSMesgQueue* cmdQ, OSMesg* cmdBuf, s32 cmdMsgC
         __osPiDevMgr.active = 1;
         __osPiDevMgr.thread = &sPiMgrThread;
         __osPiDevMgr.cmdQueue = cmdQ;
-        __osPiDevMgr.evtQueue = &D_8009E3D0;
+        __osPiDevMgr.evtQueue = &piEventQueue;
         __osPiDevMgr.acsQueue = &__osPiAccessQueue;
         __osPiDevMgr.piDmaCallback = __osPiRawStartDma;
         __osPiDevMgr.epiDmaCallback = __osEPiRawStartDma;
diff --git a/src/libultra/os/initialize.c b/src/libultra/os/initialize.c
index fdf420ee92..5c8bd66502 100644
--- a/src/libultra/os/initialize.c
+++ b/src/libultra/os/initialize.c
@@ -7,16 +7,16 @@ typedef struct {
     /* 0x4 */ u32 ins_04;   // addiu   k0, k0, 0x39E0
     /* 0x8 */ u32 ins_08;   // jr      k0 ; __osException
     /* 0xC */ u32 ins_0C;   // nop
-} struct_exceptionPreamble; // size = 0x10
+} __osExceptionVector; // size = 0x10
 
-extern struct_exceptionPreamble __osExceptionPreamble;
+extern __osExceptionVector __osExceptionPreamble;
 
 u64 osClockRate = OS_CLOCK_RATE;
 s32 osViClock = VI_NTSC_CLOCK;
 u32 __osShutdown = 0;
 u32 __OSGlobalIntMask = OS_IM_ALL;
 
-UNK_TYPE4 D_8009CF70;
+u32 __osFinalrom;
 
 void __createSpeedParam(void) {
     __Dom1SpeedParam.type = DEVICE_TYPE_INIT;
@@ -35,28 +35,28 @@ void __createSpeedParam(void) {
 void __osInitialize_common(void) {
     u32 pifdata;
 
-    D_8009CF70 = 1;
+    __osFinalrom = 1;
 
-    __osSetSR(__osGetSR() | 0x20000000);
-    __osSetFpcCsr(0x01000800);
+    __osSetSR(__osGetSR() | SR_CU1);
+    __osSetFpcCsr(FPCSR_FS | FPCSR_EV);
     __osSetWatchLo(0x04900000);
 
     while (__osSiRawReadIo(0x1FC007FC, &pifdata)) {}
 
     while (__osSiRawWriteIo(0x1FC007FC, pifdata | 8)) {}
 
-    *(struct_exceptionPreamble*)0x80000000 = __osExceptionPreamble;
-    *(struct_exceptionPreamble*)0x80000080 = __osExceptionPreamble;
-    *(struct_exceptionPreamble*)0x80000100 = __osExceptionPreamble;
-    *(struct_exceptionPreamble*)0x80000180 = __osExceptionPreamble;
+    *(__osExceptionVector*)UT_VEC = __osExceptionPreamble;
+    *(__osExceptionVector*)XUT_VEC = __osExceptionPreamble;
+    *(__osExceptionVector*)ECC_VEC = __osExceptionPreamble;
+    *(__osExceptionVector*)E_VEC = __osExceptionPreamble;
 
-    osWritebackDCache(0x80000000, 400);
-    osInvalICache(0x80000000, 400);
+    osWritebackDCache((void*)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
+    osInvalICache((void*)UT_VEC, E_VEC - UT_VEC + sizeof(__osExceptionVector));
     __createSpeedParam();
     osUnmapTLBAll();
     osMapTLBRdb();
 
-    osClockRate = (u64)((osClockRate * 3LL) / 4ULL);
+    osClockRate = osClockRate * 3 / 4;
 
     if (osResetType == COLD_RESET) {
         bzero(osAppNMIBuffer, OS_APP_NMI_BUFSIZE);
@@ -70,13 +70,13 @@ void __osInitialize_common(void) {
         osViClock = VI_NTSC_CLOCK;
     }
 
-    if (__osGetCause() & 0x1000) {
+    if (__osGetCause() & CAUSE_IP5) {
         while (true) {}
     }
 
     IO_WRITE(AI_CONTROL_REG, AI_CONTROL_DMA_ON);
-    IO_WRITE(AI_DACRATE_REG, 0x3FFF);
-    IO_WRITE(AI_BITRATE_REG, 0xF);
+    IO_WRITE(AI_DACRATE_REG, AI_MAX_DAC_RATE - 1);
+    IO_WRITE(AI_BITRATE_REG, AI_MAX_BIT_RATE - 1);
 }
 
 void __osInitialize_autodetect(void) {
diff --git a/tools/disasm/files.txt b/tools/disasm/files.txt
index 266e6f8f8e..5ac774bc9e 100644
--- a/tools/disasm/files.txt
+++ b/tools/disasm/files.txt
@@ -281,7 +281,7 @@
             0x80097FC0 : "osViModeMpalLan1",
             0x80098060 : "vi",
             0x800980D0 : "cartrominit",
-            0x800980E0 : "guS2DInitBg",
+            0x800980E0 : "vimodefpallan1",
             0x80098130 : "xldtob",
             0x80098160 : "vimgr",
             0x80098180 : "voicecontrolgain",
diff --git a/tools/disasm/variables.txt b/tools/disasm/variables.txt
index 7c4364d3ea..ba9446b199 100644
--- a/tools/disasm/variables.txt
+++ b/tools/disasm/variables.txt
@@ -336,14 +336,14 @@
     0x8009CF38:("__osEepromTimerQ","OSMesgQueue","",0x18),
     0x8009CF50:("__osEepromTimerMsg","OSMesg","",0x4),
     0x8009CF60:("sHandleStatus","UNK_TYPE1","",0x1),
-    0x8009CF70:("D_8009CF70","UNK_TYPE4","",0x4),
+    0x8009CF70:("__osFinalrom","UNK_TYPE4","",0x4),
     0x8009CF80:("__osThreadSave","OSThread","",0x1b0),
     0x8009D130:("__Dom1SpeedParam","OSPiHandle","",0x74),
     0x8009D1A8:("__Dom2SpeedParam","OSPiHandle","",0x74),
     0x8009D220:("sPiMgrThread","OSThread","",0x1b0),
     0x8009D3D0:("sPiMgrStack","u8","[4096]",0x1000),
-    0x8009E3D0:("D_8009E3D0","OSMesgQueue","",0x18),
-    0x8009E3E8:("D_8009E3E8","OSMesg","[1]",0x4),
+    0x8009E3D0:("piEventQueue","OSMesgQueue","",0x18),
+    0x8009E3E8:("piEventBuf","OSMesg","[1]",0x4),
     0x8009E3F0:("piAccessBuf","OSMesg","[1]",0x4),
     0x8009E3F8:("__osPiAccessQueue","OSMesgQueue","",0x18),
     0x8009E410:("__osPfsInodeCache","__OSInode","",0x100),