diff --git a/Makefile b/Makefile
index e4ebcd0..b35a9e8 100644
--- a/Makefile
+++ b/Makefile
@@ -321,7 +321,7 @@ clean:
 build/us/src/dk64_boot/dk64_boot_3390.c.o: OPT_FLAGS = -O2
 build/us/src/dk64_boot/dk64_boot_3D20.c.o: OPT_FLAGS = -O2
 build/us/src/dk64_boot/dk64_boot_3C00.c.o: OPT_FLAGS = -O1
-build/us/src/dk64_boot/dk64_boot_5C70.c.o: OPT_FLAGS = -O2
+build/us/src/dk64_boot/io/aisetfreq.c.o: OPT_FLAGS = -O2
 build/us/src/dk64_boot/dk64_boot_61D0.c.o: OPT_FLAGS = -O1
 build/us/src/dk64_boot/dk64_boot_62F0.c.o: OPT_FLAGS = -O1
 build/us/src/dk64_boot/ll.c.o: OPT_FLAGS = -O1
diff --git a/decompressed.us.yaml b/decompressed.us.yaml
index dd17e47..d1588f9 100644
--- a/decompressed.us.yaml
+++ b/decompressed.us.yaml
@@ -65,7 +65,7 @@ segments:
       - [0x5890, c, io/vimgr]
       - [0x5BA0, c, io/visetmode]             #DONE
       - [0x5C10, bin, dk64_boot_5C10] #??? nops ???
-      - [0x5C70, c, dk64_boot_5C70]
+      - [0x5C70, c, io/aisetfreq]
       - [0x5DC0, hasm, libc/bzero]            #DONE
       - [0x5E60, hasm, os/invalicache]        #DONE
       - [0x5EE0, hasm, os/writebackdcacheall] #DONE
diff --git a/include/functions.h b/include/functions.h
index d619ad5..372921c 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -90,8 +90,8 @@ void *memcpy(void *dest, void *src, u32 n);
 // dk64_boot/io/vimgr.c
 // TODO: viMgrMain has no documented signature
 
-// dk64_boot/dk64_boot_5C70.c
-s32 func_dk64_boot_80005070(u32 frequency); //s32 osAiSetFrequency(u32 frequency)
+// dk64_boot/io/aisetfreq.c
+s32 osAiSetFrequency(u32 frequency); //s32 osAiSetFrequency(u32 frequency)
 // TODO: osWriteBackDCacheAll has no documented signature but has been matched
 
 // dk64_boot/dk64_boot_61D0.c
diff --git a/progress/progress.dk64_boot.csv b/progress/progress.dk64_boot.csv
index 4d36beb..1346a7c 100644
--- a/progress/progress.dk64_boot.csv
+++ b/progress/progress.dk64_boot.csv
@@ -28,7 +28,6 @@ us,boot,__osSpGetStatus,12,yes
 us,boot,strchr,76,yes
 us,boot,__ull_rshift,44,yes
 us,boot,__osSetFpcCsr,16,yes
-us,boot,func_dk64_boot_80005070,324,yes
 us,boot,osCreateMesgQueue,44,yes
 us,boot,__osEepStatus,428,no
 us,boot,func_dk64_boot_800024E0,196,yes
@@ -143,6 +142,7 @@ us,boot,osSetTimer,212,yes
 us,boot,__osPackRamWriteDataSafe,128,no
 us,boot,sqrtf,16,yes
 us,boot,__osInsertTimer,392,yes
+us,boot,osAiSetFrequency,324,yes
 us,boot,func_dk64_boot_800073D0,132,yes
 us,boot,func_dk64_boot_800004B4,64,yes
 us,boot,__osPackEepReadData,140,no
@@ -198,7 +198,7 @@ us,boot,__osPopThread,16,yes
 us,boot,func_dk64_boot_800023F4,232,yes
 us,boot,func_dk64_boot_8000320C,4884,no
 us,boot,__ll_mul,48,yes
-us,boot,__osContAddressCrc,208,no
+us,boot,__osContAddressCrc,208,yes
 us,boot,__ll_div,92,yes
 us,boot,osGetTime,132,yes
 us,boot,func_dk64_boot_80000EEC,320,no
@@ -225,7 +225,7 @@ us,boot,func_dk64_boot_80005A70,12,yes
 us,boot,__cosf,360,yes
 us,boot,guOrtho,104,yes
 us,boot,__osGetSR,16,yes
-us,boot,__osContDataCrc,160,no
+us,boot,__osContDataCrc,148,yes
 us,boot,osInvalDCache,176,yes
 us,boot,__osSpRawStartDma,140,yes
 us,boot,osMapTLBRdb,96,yes
diff --git a/progress/progress.total.csv b/progress/progress.total.csv
index 6eed130..4850a8b 100644
--- a/progress/progress.total.csv
+++ b/progress/progress.total.csv
@@ -4303,7 +4303,6 @@ us,boot,__osSpGetStatus,12,yes
 us,boot,strchr,76,yes
 us,boot,__ull_rshift,44,yes
 us,boot,__osSetFpcCsr,16,yes
-us,boot,func_dk64_boot_80005070,324,yes
 us,boot,osCreateMesgQueue,44,yes
 us,boot,__osEepStatus,428,no
 us,boot,func_dk64_boot_800024E0,196,yes
@@ -4418,6 +4417,7 @@ us,boot,osSetTimer,212,yes
 us,boot,__osPackRamWriteDataSafe,128,no
 us,boot,sqrtf,16,yes
 us,boot,__osInsertTimer,392,yes
+us,boot,osAiSetFrequency,324,yes
 us,boot,func_dk64_boot_800073D0,132,yes
 us,boot,func_dk64_boot_800004B4,64,yes
 us,boot,__osPackEepReadData,140,no
@@ -4473,7 +4473,7 @@ us,boot,__osPopThread,16,yes
 us,boot,func_dk64_boot_800023F4,232,yes
 us,boot,func_dk64_boot_8000320C,4884,no
 us,boot,__ll_mul,48,yes
-us,boot,__osContAddressCrc,208,no
+us,boot,__osContAddressCrc,208,yes
 us,boot,__ll_div,92,yes
 us,boot,osGetTime,132,yes
 us,boot,func_dk64_boot_80000EEC,320,no
@@ -4500,7 +4500,7 @@ us,boot,func_dk64_boot_80005A70,12,yes
 us,boot,__cosf,360,yes
 us,boot,guOrtho,104,yes
 us,boot,__osGetSR,16,yes
-us,boot,__osContDataCrc,160,no
+us,boot,__osContDataCrc,148,yes
 us,boot,osInvalDCache,176,yes
 us,boot,__osSpRawStartDma,140,yes
 us,boot,osMapTLBRdb,96,yes
diff --git a/progress/progress_dk64_boot.svg b/progress/progress_dk64_boot.svg
index 4969e36..298475b 100644
--- a/progress/progress_dk64_boot.svg
+++ b/progress/progress_dk64_boot.svg
@@ -9,7 +9,7 @@
     </mask>
     <g mask="url(#anybadge_1)">
         <path fill="#555" d="M0 0h71v20H0z"/>
-        <path fill="#94c000" d="M71 0h67v20H71z"/>
+        <path fill="#92c000" d="M71 0h67v20H71z"/>
         <path fill="url(#b)" d="M0 0h138v20H0z"/>
     </g>
     <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
@@ -17,7 +17,7 @@
         <text x="35.5" y="14">dk64_boot</text>
     </g>
     <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
-        <text x="105.5" y="15" fill="#010101" fill-opacity=".3">61.3787%</text>
-        <text x="104.5" y="14">61.3787%</text>
+        <text x="105.5" y="15" fill="#010101" fill-opacity=".3">62.0421%</text>
+        <text x="104.5" y="14">62.0421%</text>
     </g>
 </svg>
diff --git a/progress/progress_total.svg b/progress/progress_total.svg
index 2599ca1..e88a29a 100644
--- a/progress/progress_total.svg
+++ b/progress/progress_total.svg
@@ -17,7 +17,7 @@
         <text x="66.0" y="14">Donkey Kong 64 (US)</text>
     </g>
     <g fill="#fff" text-anchor="middle" font-family="DejaVu Sans,Verdana,Geneva,sans-serif" font-size="11">
-        <text x="166.5" y="15" fill="#010101" fill-opacity=".3">41.4643%</text>
-        <text x="165.5" y="14">41.4643%</text>
+        <text x="166.5" y="15" fill="#010101" fill-opacity=".3">41.4867%</text>
+        <text x="165.5" y="14">41.4867%</text>
     </g>
 </svg>
diff --git a/src/dk64_boot/dk64_boot_1050.c b/src/dk64_boot/dk64_boot_1050.c
index d10e2f6..c4bf78d 100644
--- a/src/dk64_boot/dk64_boot_1050.c
+++ b/src/dk64_boot/dk64_boot_1050.c
@@ -88,7 +88,7 @@ void func_dk64_boot_800005A8(void *arg0) {
         func_dk64_boot_80000A30();
     } else {
         func_dk64_boot_80000450(&D_11320, &D_113F0, 0x805FB000);
-        D_dk64_boot_8000DCB4 = func_dk64_boot_80005070(22050); // osAiSetFrequency
+        D_dk64_boot_8000DCB4 = osAiSetFrequency(22050); // osAiSetFrequency
         bzero(0x805FB300, 0x204D00);
         sp34 = 0x80020000;
         sp30 = 0x805FB300;
diff --git a/src/dk64_boot/dk64_boot_5C70.c b/src/dk64_boot/io/aisetfreq.c
similarity index 86%
rename from src/dk64_boot/dk64_boot_5C70.c
rename to src/dk64_boot/io/aisetfreq.c
index 05ea5da..f903b95 100644
--- a/src/dk64_boot/dk64_boot_5C70.c
+++ b/src/dk64_boot/io/aisetfreq.c
@@ -4,8 +4,7 @@
 #include <rcp.h>
 #include "osint.h"
 
-s32 func_dk64_boot_80005070(u32 frequency) //s32 osAiSetFrequency(u32 frequency)
-{
+s32 osAiSetFrequency(u32 frequency) {
     register unsigned int dacRate;
     register unsigned char bitRate;
     register float f;
diff --git a/src/dk64_boot/io/crc.c b/src/dk64_boot/io/crc.c
index 873e54e..b8aa47a 100644
--- a/src/dk64_boot/io/crc.c
+++ b/src/dk64_boot/io/crc.c
@@ -1,6 +1,76 @@
 #include <ultra64.h>
 
+#define ADDRESS_CRC_MESSAGE_LENGTH 10
+#define ADDRESS_CRC_LENGTH 5
+#define ADDRESS_CRC_GENERATOR 0x15
+#define ADDRESS_CRC_MASK ((1 << ADDRESS_CRC_LENGTH) - 1)
 
-#pragma GLOBAL_ASM("asm/nonmatchings/dk64_boot/io/crc/__osContAddressCrc.s")
+u8 __osContAddressCrc(u16 addr) {
+    u32 addr32 = addr;
+    u32 ret = 0;
+    u32 bit;
+    s32 i;
 
-#pragma GLOBAL_ASM("asm/nonmatchings/dk64_boot/io/crc/__osContDataCrc.s")
+    // ret is used as a shift register for the CRC
+    for (bit = (1 << ADDRESS_CRC_MESSAGE_LENGTH); bit != 0; bit >>= 1) {
+        ret <<= 1;
+        if (addr32 & bit) {
+            if (ret & (1 << ADDRESS_CRC_LENGTH)) {
+                // Same as ret++; ret ^= 0x15 since last bit always 0 after the shift
+                ret ^= ADDRESS_CRC_GENERATOR - 1;
+            } else {
+                ret++;
+            }
+        } else if (ret & (1 << ADDRESS_CRC_LENGTH)) {
+            ret ^= ADDRESS_CRC_GENERATOR;
+        }
+    }
+    // Acts like 5 bits of 0s are appended to addr
+    for (i = 0; i < ADDRESS_CRC_LENGTH; i++) {
+        ret <<= 1;
+        if (ret & (1 << ADDRESS_CRC_LENGTH)) {
+            ret ^= ADDRESS_CRC_GENERATOR;
+        }
+    }
+
+    // Discard the irrelevant bits above the actual remainder
+    return ret & ADDRESS_CRC_MASK;
+}
+
+#define DATA_CRC_MESSAGE_BYTES 32
+#define DATA_CRC_LENGTH 8
+#define DATA_CRC_GENERATOR 0x85
+
+u8 __osContDataCrc(u8* data) {
+    s32 ret = 0;
+    u32 bit;
+    u32 byte;
+
+    for (byte = DATA_CRC_MESSAGE_BYTES; byte != 0; byte--, data++) {
+        // Loop over each bit in the byte starting with most significant
+        for (bit = (1 << (DATA_CRC_LENGTH - 1)); bit != 0; bit >>= 1) {
+            ret <<= 1;
+            if (*data & bit) {
+                if (ret & (1 << DATA_CRC_LENGTH)) {
+                    // Same as ret++; ret ^= 0x85 since last bit always 0 after the shift
+                    ret ^= DATA_CRC_GENERATOR - 1;
+                } else {
+                    ret++;
+                }
+            } else if (ret & (1 << DATA_CRC_LENGTH)) {
+                ret ^= DATA_CRC_GENERATOR;
+            }
+        }
+    }
+    // Act like a byte of zeros is appended to data
+    do {
+        ret <<= 1;
+        if (ret & (1 << DATA_CRC_LENGTH)) {
+            ret ^= DATA_CRC_GENERATOR;
+        }
+        byte++;
+    } while (byte < DATA_CRC_LENGTH);
+
+    // Discarding the excess is done automatically by the return type
+    return ret;
+}
\ No newline at end of file
diff --git a/symbol_addrs.us.txt b/symbol_addrs.us.txt
index ca5bb27..de0a1f1 100644
--- a/symbol_addrs.us.txt
+++ b/symbol_addrs.us.txt
@@ -93,6 +93,7 @@ __ll_to_d = 0x80007724; // segment:dk64_boot
 __ll_to_f = 0x8000773C; // segment:dk64_boot
 __ull_to_d = 0x80007754; // segment:dk64_boot
 __ull_to_f = 0x80007788; // segment:dk64_boot
+osAiSetFrequency = 0x80005070; // segment:dk64_boot
 
 osContSetCh = 0x80007360; // segment:dk64_boot
 osSetTimer = 0x800077C0; // segment:dk64_boot