diff --git a/config/dol_slices.yml b/config/dol_slices.yml
index e94f3661..e94ad4ba 100644
--- a/config/dol_slices.yml
+++ b/config/dol_slices.yml
@@ -4,16 +4,22 @@ libultra/gfxprint/gfxprint_locate8x8.c:
     .text: [0x8005B210, 0x8005B238]
 libforest/ReconfigBATs.c:
     .text: [0x8005adac, 0x8005aed4]
-# OS/OSDisableInterrupts.c:
-    # .text: [0x8007ac24, 0x8007ac38]
-OS/OSEnableInterrupts.c:
-    .text: [0x8007ac38, 0x8007ac4c]
-OS/OSRestoreInterrupts.c:
-    .text: [0x8007ac4c, 0x8007ac70]
 BASE/ppcarch.c:
     .text: [0x8007867c, 0x800786e8]
 OS/OSArena.c:
     .text: [0x8007988c, 0x800798ac]
     .sdata: [0x80218178, 0x80218180]
     .sbss: [0x802188f8, 0x80218900]
-    
\ No newline at end of file
+# OS/OSCache.c:
+    # .text: [0x80079b40, 0x80079d30]
+# OS/OSDisableInterrupts.c:
+    # .text: [0x8007ac24, 0x8007ac38]
+OS/OSEnableInterrupts.c:
+    .text: [0x8007ac38, 0x8007ac4c]
+OS/OSRestoreInterrupts.c:
+    .text: [0x8007ac4c, 0x8007ac70]
+MSL_C/rand.c:
+    .text: [0x8009f46c, 0x8009f494]
+    .sdata: [0x80218260, 0x80218268]
+libultra/ultra.c:
+    .text: [0x8005d01c, 0x8005d090]
\ No newline at end of file
diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index dc9b2e43..66155206 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -7,7 +7,7 @@ zurumode/zerucheck_key_check.c:
 zurumode/zurumode_cleanup.c:
     .text: [0x8040efc4, 0x8040f008]
 # zurumode/zurumode_update.c:
-    # .text: [0x8040EDA8 , 0x8040ee74] Has C++ functions but was matched with C?? Won't really bother at the moment with this one.
+    # .text: [0x8040EDA8 , 0x8040ee74] Won't really bother at the moment with this one.
 m_random_field/mRF_MakePerfectBit.c:
     .text: [0x8050B1AC, 0x8050B1D4]
 m_random_field/mRF_GetRandomStepMode.c:
diff --git a/include/dolphin/OSCache.h b/include/dolphin/OSCache.h
index 71ee9e26..301b2777 100644
--- a/include/dolphin/OSCache.h
+++ b/include/dolphin/OSCache.h
@@ -1,6 +1,7 @@
 #ifndef OS_CACHE_H
 #define OS_CACHE_H
 #include "types.h"
+#include "dolphin/OSContext.h"
 #ifdef __cplusplus
 extern "C" {
 #endif
diff --git a/include/dolphin/OSContext.h b/include/dolphin/OSContext.h
new file mode 100644
index 00000000..1f356ade
--- /dev/null
+++ b/include/dolphin/OSContext.h
@@ -0,0 +1,45 @@
+#ifndef OS_CONTEXT_H
+#define OS_CONTEXT_H
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct OSContext{
+	u32 gprs[32];
+	u32 cr;
+	u32 lr;
+	u32 ctr;
+	u32 xer;
+	f64 fprs[32];
+	u32 fpscr_tmp;
+	u32 fpscr;
+	u32 srr0;
+	u32 srr1;
+	u16 SHORT_0x1A0;
+	u16 SHORT_0x1A2;
+	u32 gqrs[8];
+	char UNK_0x1C4;
+	f64 psfs[32];
+} OSContext;
+
+OSContext* OS_CURRENT_CONTEXT_PHYS : 0x800000C0;
+OSContext* OS_CURRENT_CONTEXT : 0x800000D4;
+OSContext* OS_CURRENT_FPU_CONTEXT : 0x800000D8;
+
+asm void OSSaveFPUContext(OSContext*);
+asm void OSSetCurrentContext(OSContext*);
+OSContext* OSGetCurrentContext(void);
+asm BOOL OSSaveContext(OSContext*);
+asm void OSLoadContext(OSContext*);
+asm void* OSGetStackPointer(void);
+void OSClearContext(OSContext*);
+asm void OSInitContext(OSContext*);
+void OSDumpContext(OSContext*);
+
+void __OSContextInit(void);
+#ifdef __cplusplus
+}
+#endif
+#endif
\ No newline at end of file
diff --git a/include/dolphin/OSMemory.h b/include/dolphin/OSMemory.h
index af9089cd..b6e0bd31 100644
--- a/include/dolphin/OSMemory.h
+++ b/include/dolphin/OSMemory.h
@@ -1,7 +1,17 @@
 #ifndef OS_MEMORY_H
 #define OS_MEMORY_H
+#include "types.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define SIM_MEM *(u32 *)0x800000f0 
 static asm void Config24MB();
 static asm void Config48MB();
 u32 OSGetConsoleSimulatedMemSize(void);
+
+#ifdef __cplusplus
+}
+#endif
 #endif
\ No newline at end of file
diff --git a/include/dolphin/OSTime.h b/include/dolphin/OSTime.h
new file mode 100644
index 00000000..c7152672
--- /dev/null
+++ b/include/dolphin/OSTime.h
@@ -0,0 +1,13 @@
+#ifndef OS_TIME_H
+#define OS_TIME_H
+#include "types.h"
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+asm s32 OSGetTime(void);
+
+#ifdef __cplusplus
+}
+#endif
+#endif
\ No newline at end of file
diff --git a/include/dolphin/os.h b/include/dolphin/os.h
index 83a730c1..2993108c 100644
--- a/include/dolphin/os.h
+++ b/include/dolphin/os.h
@@ -12,6 +12,10 @@ void OSReport(const char*, ...);
 asm BOOL OSDisableInterrupts(void);
 asm BOOL OSEnableInterrupts(void);
 asm BOOL OSRestoreInterrupts(BOOL level);
+
+
+void __RAS_OSDisableInterrupts_begin(void);
+void __RAS_OSDisableInterrupts_end(void);
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/libultra/libultra.h b/include/libultra/libultra.h
index 960e3cfc..d17d7d13 100644
--- a/include/libultra/libultra.h
+++ b/include/libultra/libultra.h
@@ -1,10 +1,18 @@
 #ifndef LIBULTRA_H
 #define LIBULTRA_H
 #include "types.h"
-
-void bcmp (const void *v1, const void *v2, u32 size);
-void bcopy(const void *dst, void *src, size_t n);
+#include "dolphin/OSTime.h"
+#include "dolphin/OSCache.h"
+int bcmp (void *v1, void *v2, u32 size);
+void bcopy(void *dst, void *src, size_t n);
 void bzero(void *ptr, size_t size);
+void osSyncPrintf(const char* fmt, ...);
+void osWritebackDCache(void* vaddr, u32 nbytes);
+u32 osGetCount(void);
 extern s32 osAppNMIBuffer[15]; 
 
+extern void * memcpy(void * dst, const void * src, size_t n);
+extern void * memset(void * dst, int val, size_t n);
+extern void __fill_mem(void * dst, int val, unsigned long n);
+
 #endif 
\ No newline at end of file
diff --git a/include/rand.h b/include/rand.h
new file mode 100644
index 00000000..205616fe
--- /dev/null
+++ b/include/rand.h
@@ -0,0 +1,8 @@
+#ifndef RAND_H
+#define RAND_H
+#include "types.h"
+
+void srand (u32 seeed);
+int rand(void);
+
+#endif
\ No newline at end of file
diff --git a/src/MSL_C/rand.c b/src/MSL_C/rand.c
new file mode 100644
index 00000000..973fee80
--- /dev/null
+++ b/src/MSL_C/rand.c
@@ -0,0 +1,12 @@
+#include "rand.h"
+
+static u32 next = 1;
+
+void srand(u32 seed){
+    next = seed;
+}
+
+int rand(){
+    next = next * 1103515245 + 12345;
+    return ((next >> 16) & 0x7fff);
+}
\ No newline at end of file
diff --git a/src/OS/OSCache.c b/src/OS/OSCache.c
index be8e02dc..5f0f712f 100644
--- a/src/OS/OSCache.c
+++ b/src/OS/OSCache.c
@@ -2,7 +2,7 @@
 //Needs OSError stuff
 asm void DCEnable(void){
 	nofralloc
-	sync 0
+	sync
 	mfspr r3, 0x3f0
 	ori r3, r3, 0x4000
 	mtspr 0x3f0, r3
@@ -10,42 +10,42 @@ asm void DCEnable(void){
 }
 asm void DCInvalidateRange(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- pi_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 pi_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 inv_ran:
 	dcbi 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz inv_ran
 	
 	blr
 }
 asm void DCFlushRange(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- pf_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 pf_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 fls_ran:
 	dcbf 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz fls_ran
 	sc
 	blr
@@ -53,21 +53,21 @@ fls_ran:
 
 asm void DCStoreRange(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- ps_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 ps_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 st_ran:
 	dcbst 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz st_ran
 	sc
 	blr
@@ -75,42 +75,42 @@ st_ran:
 
 asm void DCFlushRangeNoSync(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
-	beq- pf_r
-	addi len, len 0x20
+	beq- pfns_r
+	addi len, len, 0x20
 	
 pfns_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 fls_ranns:
 	dcbf 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz fls_ranns
 	blr
 }
 
 asm void DCStoreRangeNoSync(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- psns_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 psns_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 st_ranns:
 	dcbst 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz st_ranns
 	sc
 	blr
@@ -118,65 +118,65 @@ st_ranns:
 
 asm void DCZeroRange(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- pzr_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 pzr_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 z_ran:
 	dcbz 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz z_ran
 	blr
 }
 
 asm void DCTouchRange(register void* buf, register u32 len){
 	nofralloc
-	cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- ptor_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 ptor_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 t_ran:
 	dcbt 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz t_ran
 	blr
 }
 
 asm void ICInvalidateRange(register void* buf, register u32 len){
 	nofralloc
-		cmplw len, 0
+	cmplwi len, 0
 	blelr-
 	
 	clrlwi. r5, buf, 0x1b
 	beq- pir_r
-	addi len, len 0x20
+	addi len, len, 0x20
 	
 pir_r:
-	addi len, len 0x1f
+	addi len, len, 0x1f
 	srwi len, len, 5
 	mtctr len
 	
 i_ran:
 	icbi 0, buf
-	addi buf, buf 0x20
+	addi buf, buf, 0x20
 	bdnz i_ran
-	sync 0
+	sync
 	isync
 	blr
 }
@@ -197,14 +197,14 @@ asm void ICEnable(void){
 	blr
 }
 
-asm void ICDisable(void){
+asm void LCDisable(void){
 	nofralloc
 	lis r3, 0xE000
 	li r4, 0x200
 	mtctr r4
 dis:
 	dcbi 0, r3
-	addi r3, r3 0x20
+	addi r3, r3, 0x20
 	bdnz dis
 	mfspr r4, 0x398
 	rlwinm r4, r4, 0, 4, 2
diff --git a/src/OS/OSContext.c b/src/OS/OSContext.c
new file mode 100644
index 00000000..d776b56b
--- /dev/null
+++ b/src/OS/OSContext.c
@@ -0,0 +1,249 @@
+#include "dolphin/OSContext.h"
+
+static asm void __OSLoadFPUContext(int unused, register OSContext* ctx){
+	nofralloc
+	lhz r5, ctx->SHORT_0x1A2
+	clrlwi. r5, r5, 0x1f
+	beq exit
+	
+	lfd f0, ctx->fpscr_temp
+	mtfs f0
+	mfspr r5, 0x398
+	rlwinm. r5, r5, 3, 0x1f, 0x1f
+	beq load_fprs
+	
+	psq_l f0, 0x1C8(ctx), 0, 0
+    psq_l f1, 0x1D0(ctx), 0, 0
+    psq_l f2, 0x1D8(ctx), 0, 0
+    psq_l f3, 0x1E0(ctx), 0, 0
+    psq_l f4, 0x1E8(ctx), 0, 0
+    psq_l f5, 0x1F0(ctx), 0, 0
+    psq_l f6, 0x1F8(ctx), 0, 0
+    psq_l f7, 0x200(ctx), 0, 0
+    psq_l f8, 0x208(ctx), 0, 0
+    psq_l f9, 0x210(ctx), 0, 0
+    psq_l f10, 0x218(ctx), 0, 0
+    psq_l f11, 0x220(ctx), 0, 0
+    psq_l f12, 0x228(ctx), 0, 0
+    psq_l f13, 0x230(ctx), 0, 0
+    psq_l f14, 0x238(ctx), 0, 0
+    psq_l f15, 0x240(ctx), 0, 0
+    psq_l f16, 0x248(ctx), 0, 0
+    psq_l f17, 0x250(ctx), 0, 0
+    psq_l f18, 0x258(ctx), 0, 0
+    psq_l f19, 0x260(ctx), 0, 0
+    psq_l f20, 0x268(ctx), 0, 0
+    psq_l f21, 0x270(ctx), 0, 0
+    psq_l f22, 0x278(ctx), 0, 0
+    psq_l f23, 0x280(ctx), 0, 0
+    psq_l f24, 0x288(ctx), 0, 0
+    psq_l f25, 0x290(ctx), 0, 0
+    psq_l f26, 0x298(ctx), 0, 0
+    psq_l f27, 0x2A0(ctx), 0, 0
+    psq_l f28, 0x2A8(ctx), 0, 0
+    psq_l f29, 0x2B0(ctx), 0, 0
+    psq_l f30, 0x2B8(ctx), 0, 0
+    psq_l f31, 0x2C0(ctx), 0, 0
+	
+load_fprs:
+    lfd f0, ctx->fprs[0]
+    lfd f1, ctx->fprs[1]
+    lfd f2, ctx->fprs[2]
+    lfd f3, ctx->fprs[3]
+    lfd f4, ctx->fprs[4]
+    lfd f5, ctx->fprs[5]
+    lfd f6, ctx->fprs[6]
+    lfd f7, ctx->fprs[7]
+    lfd f8, ctx->fprs[8]
+    lfd f9, ctx->fprs[9]
+    lfd f10, ctx->fprs[10]
+    lfd f11, ctx->fprs[11]
+    lfd f12, ctx->fprs[12]
+    lfd f13, ctx->fprs[13]
+    lfd f14, ctx->fprs[14]
+    lfd f15, ctx->fprs[15]
+    lfd f16, ctx->fprs[16]
+    lfd f17, ctx->fprs[17]
+    lfd f18, ctx->fprs[18]
+    lfd f19, ctx->fprs[19]
+    lfd f20, ctx->fprs[20]
+    lfd f21, ctx->fprs[21]
+    lfd f22, ctx->fprs[22]
+    lfd f23, ctx->fprs[23]
+    lfd f24, ctx->fprs[24]
+    lfd f25, ctx->fprs[25]
+    lfd f26, ctx->fprs[26]
+    lfd f27, ctx->fprs[27]
+    lfd f28, ctx->fprs[28]
+    lfd f29, ctx->fprs[29]
+    lfd f30, ctx->fprs[30]
+    lfd f31, ctx->fprs[31]
+	
+exit:
+	blr
+}
+
+static asm void __OSSaveFPUContext( int unused, int unused1, register OSContext* ctx){
+	nofralloc
+	lhz r3, ctx->SHORT_0x1A2
+	ori r3, r3, 1
+	sth r3, ctx->SHORT_0x1A2
+	
+	    stfd f0, ctx->fprs[0]
+    stfd f1, ctx->fprs[1]
+    stfd f2, ctx->fprs[2]
+    stfd f3, ctx->fprs[3]
+    stfd f4, ctx->fprs[4]
+    stfd f5, ctx->fprs[5]
+    stfd f6, ctx->fprs[6]
+    stfd f7, ctx->fprs[7]
+    stfd f8, ctx->fprs[8]
+    stfd f9, ctx->fprs[9]
+    stfd f10, ctx->fprs[10]
+    stfd f11, ctx->fprs[11]
+    stfd f12, ctx->fprs[12]
+    stfd f13, ctx->fprs[13]
+    stfd f14, ctx->fprs[14]
+    stfd f15, ctx->fprs[15]
+    stfd f16, ctx->fprs[16]
+    stfd f17, ctx->fprs[17]
+    stfd f18, ctx->fprs[18]
+    stfd f19, ctx->fprs[19]
+    stfd f20, ctx->fprs[20]
+    stfd f21, ctx->fprs[21]
+    stfd f22, ctx->fprs[22]
+    stfd f23, ctx->fprs[23]
+    stfd f24, ctx->fprs[24]
+    stfd f25, ctx->fprs[25]
+    stfd f26, ctx->fprs[26]
+    stfd f27, ctx->fprs[27]
+    stfd f28, ctx->fprs[28]
+    stfd f29, ctx->fprs[29]
+    stfd f30, ctx->fprs[30]
+    stfd f31, ctx->fprs[31]
+	
+	mffs f0
+	stfd f0, ctx->fpscr_tmp
+	lfd f0, ctx->fprs[0]
+	mfspr r3, 0x398
+	rlwinm. r3, r3, 3, 0x1f, 0x1f
+	beq exit
+	
+	    psq_st f0, 0x1C8(ctx), 0, 0
+    psq_st f1, 0x1D0(ctx), 0, 0
+    psq_st f2, 0x1D8(ctx), 0, 0
+    psq_st f3, 0x1E0(ctx), 0, 0
+    psq_st f4, 0x1E8(ctx), 0, 0
+    psq_st f5, 0x1F0(ctx), 0, 0
+    psq_st f6, 0x1F8(ctx), 0, 0
+    psq_st f7, 0x200(ctx), 0, 0
+    psq_st f8, 0x208(ctx), 0, 0
+    psq_st f9, 0x210(ctx), 0, 0
+    psq_st f10, 0x218(ctx), 0, 0
+    psq_st f11, 0x220(ctx), 0, 0
+    psq_st f12, 0x228(ctx), 0, 0
+    psq_st f13, 0x230(ctx), 0, 0
+    psq_st f14, 0x238(ctx), 0, 0
+    psq_st f15, 0x240(ctx), 0, 0
+    psq_st f16, 0x248(ctx), 0, 0
+    psq_st f17, 0x250(ctx), 0, 0
+    psq_st f18, 0x258(ctx), 0, 0
+    psq_st f19, 0x260(ctx), 0, 0
+    psq_st f20, 0x268(ctx), 0, 0
+    psq_st f21, 0x270(ctx), 0, 0
+    psq_st f22, 0x278(ctx), 0, 0
+    psq_st f23, 0x280(ctx), 0, 0
+    psq_st f24, 0x288(ctx), 0, 0
+    psq_st f25, 0x290(ctx), 0, 0
+    psq_st f26, 0x298(ctx), 0, 0
+    psq_st f27, 0x2A0(ctx), 0, 0
+    psq_st f28, 0x2A8(ctx), 0, 0
+    psq_st f29, 0x2B0(ctx), 0, 0
+    psq_st f30, 0x2B8(ctx), 0, 0
+    psq_st f31, 0x2C0(ctx), 0, 0
+	
+exit:
+	blr
+}
+
+asm void OSSetCurrentContext(register OSContext* ctx){
+	nofralloc
+	lis r4, 0x8000
+	stw ctx, OS_GET_CURRENT_CONTEXT@l(r4)
+	clrlwi r5, ctx, 2
+	stw r5, OS_CURRENT_CONTEXT_PHYS@l(r4)
+	lwz r5, OS_CURRENT_FPU_CONTEXT@l(r4)
+	cmpw r5, ctx
+	bne not_cur_fpu_ctx
+	
+	lwz r6, ctx->srr1
+	ori r6, r6, 0x2000
+	stw r6, ctx->srr1
+	mfmsr r6
+	ori r6, r6, 2
+	mtmsr r6
+	blr
+	
+not_cur_fpu_ctx:
+	lwz r6, ctx->srr1
+	rlwinm r6, r6, 0, 0x13, 0x11
+	stw r6, ctx->srr1
+	mfmsr r6
+	rlwinm r6, r6, 0, 0x13, 0x11
+	ori r6, r6, 2
+	mtmsr r6
+	isync
+	blr
+}
+
+OSContext* OSGetCurrentContext(void) {
+	return(OS_CURRENT_CONTEXT)
+}
+
+asm BOOL OSSaveContext(register OSContext* ctx){
+	nofralloc
+	stmw r13, ctx->gprs[13]
+	mfspr r0, 0x391
+	stw r3, ctx->gqrs[1]
+	mfspr r0, 0x392
+	stw r3, ctx->gqrs[2]
+	mfspr r0, 0x393
+	stw r3, ctx->gqrs[3]
+	mfpsr r0, 0x394
+	stw r3, ctx->gqrs[4]
+	mfspr r0, 0x395
+	stw r3, ctx->gqrs[5]
+	mfpsr r0, 0x396
+	stw r3, ctx->gqrs[6]
+	mfspr r0, 0x397
+	stw r3, ctx->gqrs[7]
+	
+	mfcr r0
+	
+	stw r3, ctx->cr
+	mflr r0
+	stw r3, ctx->lr
+	stw r3, ctx->srr0
+	mfmsr r0
+	
+	stw r3, ctx->srr1
+	mfctr r0
+	
+	stw r3, ctx->ctr
+	mfxer r0
+	
+	stw r3, ctx->xer
+	
+	stw r1, ctx->gprs[1]
+	stw r2, ctx->gprs[2]
+	li r0, 1
+	li r0, 0x0c(r3)
+	li r3, 0
+	
+	blr	
+}
+
+/* asm void OSLoadContext(register OSContext* ctx){
+	nofralloc
+	
+} */
\ No newline at end of file
diff --git a/src/OS/OSDisableInterrupts.c b/src/OS/OSDisableInterrupts.c
index 8c82c584..635a1909 100644
--- a/src/OS/OSDisableInterrupts.c
+++ b/src/OS/OSDisableInterrupts.c
@@ -2,9 +2,12 @@
 
 asm BOOL OSDisableInterrupts(void){
     nofralloc
+
+    entry __RAS_OSDisableInterrupts_begin
     mfmsr r3
     rlwinm r4, r3, 0, 17, 15
     mtmsr r4
+    entry __RAS_OSDisableInterrupts_end
     rlwinm r3, r3, 17, 31, 31
     blr
 }
\ No newline at end of file
diff --git a/src/OS/OSMemory.c b/src/OS/OSMemory.c
new file mode 100644
index 00000000..e6973f32
--- /dev/null
+++ b/src/OS/OSMemory.c
@@ -0,0 +1,5 @@
+#include "dolphin/OSMemory.h"
+
+u32 OSGetConsoleSimulatedMemSize(void){
+	return(SIM_MEM);
+}
\ No newline at end of file
diff --git a/src/libultra/ultra.c b/src/libultra/ultra.c
new file mode 100644
index 00000000..44904962
--- /dev/null
+++ b/src/libultra/ultra.c
@@ -0,0 +1,23 @@
+#include "libultra/libultra.h"
+
+void bcopy(void* __src, void* __dst, size_t __n) {
+    memmove(__dst, __src, __n);
+}
+
+
+int bcmp(void* __s1, void* __s2, size_t __n) {
+    return memcmp(__s1, __s2, __n);
+}
+
+void bzero(void* __s, size_t __n) {
+    memset(__s, 0, __n);
+}
+
+/* void osWritebackDCache(void* buf, u32 len){
+	 DCStoreRange();
+}
+ */
+/* s32 osGetCount(void){
+	return OSGetTick();
+}
+ */
\ No newline at end of file