diff --git a/Makefile b/Makefile
index f4cceb7f74..a0f93e2509 100644
--- a/Makefile
+++ b/Makefile
@@ -32,6 +32,8 @@ OBJCOPY := $(DEVKITARM)/bin/arm-none-eabi-objcopy
 
 LIBGCC := tools/agbcc/lib/libgcc.a
 
+LIBC := tools/agbcc/lib/libc.a
+
 SHA1 := sha1sum -c
 
 GFX := tools/gbagfx/gbagfx
@@ -160,7 +162,7 @@ $(OBJ_DIR)/ld_script.ld: ld_script.txt $(OBJ_DIR)/sym_bss.ld $(OBJ_DIR)/sym_comm
 	cd $(OBJ_DIR) && sed -f ../../ld_script.sed ../../$< | sed "s#tools/#../../tools/#g" > ld_script.ld
 
 $(ELF): $(OBJ_DIR)/ld_script.ld $(OBJS)
-	cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ld_script.ld -o ../../$@ $(OBJS_REL) ../../$(LIBGCC)
+	cd $(OBJ_DIR) && $(LD) $(LDFLAGS) -T ld_script.ld -o ../../$@ $(OBJS_REL) ../../$(LIBGCC) ../../$(LIBC)
 
 $(ROM): $(ELF)
 	$(OBJCOPY) -O binary --gap-fill 0xFF --pad-to 0x9000000 $< $@
diff --git a/include/config.h b/include/config.h
index 162af3143f..318ed39d84 100644
--- a/include/config.h
+++ b/include/config.h
@@ -1,6 +1,23 @@
 #ifndef GUARD_CONFIG_H
 #define GUARD_CONFIG_H
 
+// In the Generation 3 games, Asserts were used in various debug builds.
+// Ruby/Sapphire and Emerald do not have these asserts while Fire Red
+// still has them in the ROM. This is because the developers forgot
+// to define NDEBUG before release, however this has been changed as
+// Ruby's actual debug build does not use the AGBPrint features.
+#define NDEBUG
+
+// To enable print debugging, comment out "#define NDEBUG". This allows
+// the various AGBPrint functions to be used. (See include/gba/isagbprint.h).
+// Some emulators support a debug console window: uncomment NoCashGBAPrint()
+// and NoCashGBAPrintf() in libisagbprn.c to use no$gba's own proprietary
+// printing system. Use NoCashGBAPrint() and NoCashGBAPrintf() like you
+// would normally use AGBPrint() and AGBPrintf().
+
+// NOTE: Don't try to enable assert right now as many pointers
+// still exist in defines and WILL likely result in a broken ROM.
+
 #define ENGLISH
 
 #ifdef ENGLISH
diff --git a/include/gba/gba.h b/include/gba/gba.h
index 42ae3cdde7..349344031f 100644
--- a/include/gba/gba.h
+++ b/include/gba/gba.h
@@ -7,5 +7,6 @@
 #include "gba/multiboot.h"
 #include "gba/syscall.h"
 #include "gba/macro.h"
+#include "gba/isagbprint.h"
 
 #endif // GUARD_GBA_GBA_H
diff --git a/include/gba/isagbprint.h b/include/gba/isagbprint.h
new file mode 100755
index 0000000000..c5eb456c3f
--- /dev/null
+++ b/include/gba/isagbprint.h
@@ -0,0 +1,50 @@
+#ifndef GUARD_GBA_ISAGBPRINT_H
+#define GUARD_GBA_ISAGBPRINT_H
+
+#ifdef NDEBUG
+#define AGBPrintInit()
+#define AGBPutc(cChr)
+#define AGBPrint(pBuf)
+#define	AGBPrintf(pBuf, ...)
+#define AGBPrintFlush1Block()
+#define AGBPrintFlush()
+#define AGBAssert(pFile, nLine, pExpression, nStopProgram)
+#else
+void AGBPrintInit(void);
+void AGBPutc(const char cChr);
+void AGBPrint(const char *pBuf);
+void AGBPrintf(const char *pBuf, ...);
+void AGBPrintFlush1Block(void);
+void AGBPrintFlush(void);
+void AGBAssert(const char *pFile, int nLine, const char *pExpression, int nStopProgram);
+#endif
+
+#undef AGB_ASSERT
+#ifdef NDEBUG
+#define	AGB_ASSERT(exp)
+#else
+#define	AGB_ASSERT(exp) (exp) ? ((void*)0) : AGBAssert(__FILE__, __LINE__, #exp, 1);
+#endif
+
+#undef AGB_WARNING
+#ifdef NDEBUG
+#define	AGB_WARNING(exp)
+#else
+#define	AGB_WARNING(exp) (exp) ? ((void*)0) : AGBAssert(__FILE__, __LINE__, #exp, 0);
+#endif
+
+// for matching purposes
+
+#ifdef NDEBUG
+#define	AGB_ASSERT_EX(exp, file, line)
+#else
+#define	AGB_ASSERT_EX(exp, file, line) (exp) ? ((void*)0) : AGBAssert(file, line, #exp, 1);
+#endif
+
+#ifdef NDEBUG
+#define	AGB_WARNING_EX(exp, file, line)
+#else
+#define	AGB_WARNING_EX(exp, file, line) (exp) ? ((void*)0) : AGBAssert(file, line, #exp, 0);
+#endif
+
+#endif // GUARD_GBA_ISAGBPRINT_H
diff --git a/include/global.h b/include/global.h
index 7943fc569e..3e260fd2ad 100644
--- a/include/global.h
+++ b/include/global.h
@@ -1,8 +1,8 @@
 #ifndef GUARD_GLOBAL_H
 #define GUARD_GLOBAL_H
 
+#include "config.h" // we need to define config before gba headers as print stuff needs the functions nulled before defines.
 #include "gba/gba.h"
-#include "config.h"
 
 // Prevent cross-jump optimization.
 #define BLOCK_CROSS_JUMP asm("");
diff --git a/ld_script.txt b/ld_script.txt
index 9f922126eb..ae8dd057d3 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -31,7 +31,8 @@ SECTIONS {
 
         /* COMMON starts at 0x30022A8 */
 <COMMON>
-
+        tools/agbcc/lib/libc.a:sbrkr.o(COMMON);
+        end = .;
         . = 0x8000;
     }
 
@@ -325,7 +326,42 @@ SECTIONS {
         tools/agbcc/lib/libgcc.a:fp-bit.o(.text);
         tools/agbcc/lib/libgcc.a:_lshrdi3.o(.text);
         tools/agbcc/lib/libgcc.a:_negdi2.o(.text);
-        src/libc.o(.text);
+        tools/agbcc/lib/libc.a:memcpy.o(.text);
+        tools/agbcc/lib/libc.a:memset.o(.text);
+        tools/agbcc/lib/libc.a:strcmp.o(.text);
+        tools/agbcc/lib/libc.a:strcpy.o(.text);
+        tools/agbcc/lib/libc.a:vfprintf.o(.text);
+        tools/agbcc/lib/libc.a:vsprintf.o(.text);
+        tools/agbcc/lib/libc.a:fvwrite.o(.text);
+        tools/agbcc/lib/libc.a:locale.o(.text);
+        tools/agbcc/lib/libc.a:findfp.o(.text);
+        tools/agbcc/lib/libc.a:fflush.o(.text);
+        tools/agbcc/lib/libc.a:wsetup.o(.text);
+        tools/agbcc/lib/libc.a:mbtowc_r.o(.text);
+        tools/agbcc/lib/libc.a:s_isinf.o(.text);
+        tools/agbcc/lib/libc.a:s_isnan.o(.text);
+        tools/agbcc/lib/libc.a:memchr.o(.text);
+        tools/agbcc/lib/libc.a:strlen.o(.text);
+        tools/agbcc/lib/libc.a:dtoa.o(.text);
+        tools/agbcc/lib/libc.a:memmove.o(.text);
+        tools/agbcc/lib/libc.a:stdio.o(.text);
+        tools/agbcc/lib/libc.a:mprec.o(.text);
+        tools/agbcc/lib/libc.a:mallocr.o(.text);
+        tools/agbcc/lib/libc.a:fwalk.o(.text);
+        tools/agbcc/lib/libc.a:freer.o(.text);
+        tools/agbcc/lib/libc.a:makebuf.o(.text);
+        tools/agbcc/lib/libc.a:readr.o(.text);
+        tools/agbcc/lib/libc.a:writer.o(.text);
+        tools/agbcc/lib/libc.a:lseekr.o(.text);
+        tools/agbcc/lib/libc.a:closer.o(.text);
+        tools/agbcc/lib/libc.a:callocr.o(.text);
+        tools/agbcc/lib/libc.a:sbrkr.o(.text);
+        tools/agbcc/lib/libc.a:mlock.o(.text);
+        tools/agbcc/lib/libc.a:fstatr.o(.text);
+        tools/agbcc/lib/libc.a:libcfunc.o(.text);
+        tools/agbcc/lib/libc.a:syscalls.o(.text);
+        tools/agbcc/lib/libc.a:errno.o(.text);
+        src/libisagbprn.o(.text);
     } =0
 
     .rodata :
@@ -1059,6 +1095,10 @@ SECTIONS {
         data/librfu_rodata.o(.rodata);
         tools/agbcc/lib/libgcc.a:_divdi3.o(.rodata);
         tools/agbcc/lib/libgcc.a:_udivdi3.o(.rodata);
+        tools/agbcc/lib/libc.a(.rodata);
+        tools/agbcc/lib/libc.a(.data);
+        tools/agbcc/lib/libc.a:syscalls.o(.rodata);
+        src/libisagbprn.o(.rodata);
     } =0
 
     other_data :
diff --git a/src/libc.c b/src/libc.c
deleted file mode 100644
index 1f457957ba..0000000000
--- a/src/libc.c
+++ /dev/null
@@ -1,173 +0,0 @@
-#include "global.h"
-#include <stddef.h>
-
-#define LBLOCKSIZE (sizeof(long))
-
-// Nonzero if (long)X contains a NULL byte.
-#define CONTAINSNULL(X) (((X) - 0x01010101) & ~(X) & 0x80808080)
-
-// Nonzero if X is not aligned on a "long" boundary.
-#define UNALIGNED(X) ((long)X & (LBLOCKSIZE - 1))
-
-void *memcpy(void *dst0, const void *src0, size_t len0)
-{
-    char *dst = dst0;
-    const char *src = src0;
-    long *aligned_dst;
-    const long *aligned_src;
-    unsigned int len = len0;
-
-    // If the size is small, or either src or dst is unaligned,
-    // then go to the byte copy loop. This should be rare.
-    if(len >= 16 && !(UNALIGNED(src) | UNALIGNED(dst)))
-    {
-        aligned_dst = (long *)dst;
-        aligned_src = (long *)src;
-
-        // Copy 4X long words at a time if possible.
-        while(len >= 16)
-        {
-            *aligned_dst++ = *aligned_src++;
-            *aligned_dst++ = *aligned_src++;
-            *aligned_dst++ = *aligned_src++;
-            *aligned_dst++ = *aligned_src++;
-            len -= 16;
-        }
-
-        // Copy one long word at a time if possible
-        while(len >= 4)
-        {
-            *aligned_dst++ = *aligned_src++;
-            len -= 4;
-        }
-
-        dst = (char *)aligned_dst;
-        src = (char *)aligned_src;
-    }
-
-    // Pick up any remaining bytes with a byte copier.
-    while(len--)
-        *dst++ = *src++;
-
-    return dst0;
-}
-
-void *memset(void *m, int c, size_t n)
-{
-    char *s = (char *)m;
-    int count, i;
-    unsigned long buffer;
-    unsigned long *aligned_addr;
-    unsigned char *unaligned_addr;
-
-    // If the size is small or m is unaligned,
-    // then go to the byte copy loop. This should be rare.
-    if(n >= LBLOCKSIZE && !UNALIGNED(m))
-    {
-        // We know that n is large and m is word-aligned.
-        aligned_addr = (unsigned long *)m;
-
-        // Store C into each char sized location in buffer so that
-        // we can set large blocks quickly.
-        c &= 0xFF;
-        if(LBLOCKSIZE == 4)
-        {
-            buffer = (c << 8) | c;
-            buffer |= (buffer << 16);
-        }
-        else
-        {
-            buffer = 0;
-            for(i = 0; i < LBLOCKSIZE; i++)
-                buffer = (buffer << 8) | c;
-        }
-
-        while(n >= LBLOCKSIZE * 4)
-        {
-            *aligned_addr++ = buffer;
-            *aligned_addr++ = buffer;
-            *aligned_addr++ = buffer;
-            *aligned_addr++ = buffer;
-            n -= LBLOCKSIZE * 4;
-        }
-        while(n >= LBLOCKSIZE)
-        {
-            *aligned_addr++ = buffer;
-            n -= LBLOCKSIZE;
-        }
-
-        s = (char *)aligned_addr;
-    }
-
-    // Pick up the remainder with a bytewise loop.
-    while(n--)
-        *s++ = (char)c;
-
-    return m;
-}
-
-int strcmp(const char *s1, const char *s2)
-{
-    unsigned long *a1;
-    unsigned long *a2;
-
-    // If s1 or s2 are unaligned, then skip this and compare bytes.
-    if(!(UNALIGNED(s1) | UNALIGNED(s2)))
-    {
-        // Compare them a word at a time.
-        a1 = (unsigned long *)s1;
-        a2 = (unsigned long *)s2;
-        while(*a1 == *a2)
-        {
-            // If *a1 == *a2, and we find a null in *a1,
-            // then the strings must be equal, so return zero.
-            if(CONTAINSNULL(*a1))
-                return 0;
-
-            a1++;
-            a2++;
-        }
-
-        s1 = (char *)a1;
-        s2 = (char *)a2;
-    }
-
-    // Check the remaining few bytes.
-    while(*s1 != '\0' && *s1 == *s2)
-    {
-        s1++;
-        s2++;
-    }
-
-    return (*(unsigned char *) s1) - (*(unsigned char *) s2);
-}
-
-char* strcpy(char *dst0, const char *src0)
-{
-    char *dst = dst0;
-    const char *src = src0;
-    unsigned long *a1;
-    const unsigned long *a2;
-
-    // If SRC or DEST is unaligned, then copy bytes.
-    if(!(UNALIGNED(src) | UNALIGNED(dst)))
-    {
-        // SRC and DEST are both "long int" aligned, try to do "long int"
-        // sized copies.
-        a1 = (unsigned long *)dst;
-        a2 = (unsigned long *)src;
-        while(!CONTAINSNULL(*a2))
-        {
-            *a1++ = *a2++;
-        }
-
-        dst = (char *)a1;
-        src = (char *)a2;
-    }
-
-    // Copy the remaining few bytes.
-    while(*dst++ = *src++);
-
-    return dst0;
-}
-
diff --git a/src/libisagbprn.c b/src/libisagbprn.c
new file mode 100755
index 0000000000..e0e979e95e
--- /dev/null
+++ b/src/libisagbprn.c
@@ -0,0 +1,177 @@
+#include <stdarg.h>
+#include <stdio.h>
+#include "gba/gba.h"
+#include "config.h"
+
+#define AGB_PRINT_FLUSH_ADDR 0x9FE209D
+#define AGB_PRINT_STRUCT_ADDR 0x9FE20F8
+#define AGB_PRINT_PROTECT_ADDR 0x9FE2FFE
+#define WSCNT_DATA (WAITCNT_PHI_OUT_16MHZ | WAITCNT_WS0_S_2 | WAITCNT_WS0_N_4)
+
+// originally for auto no$gba support, the string "no$gba" should be at this address,
+// the user needs to read this string out as the memory viewer won't show it.
+#define NOCASHGBAIDADDR 0x4FFFA00
+#define NOCASHGBAPRINTADDR1 0x4FFFA10 // automatically adds a newline after the string has finished
+#define NOCASHGBAPRINTADDR2 0x4FFFA14 // does not automatically add the newline. by default, NOCASHGBAPRINTADDR2 is used. this is used to keep strings consistent between no$gba and VBA-RR, but a user can choose to forgo this.
+
+struct AGBPrintStruct
+{
+    u16 m_nRequest;
+    u16 m_nBank;
+    u16 m_nGet;
+    u16 m_nPut;
+};
+
+typedef void (*LPFN_PRINT_FLUSH)(void);
+
+#ifndef NDEBUG
+
+void AGBPrintFlush1Block(void);
+
+void AGBPrintInit(void)
+{
+    volatile struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
+    u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
+    u16 *pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
+    u16 nOldWSCNT = *pWSCNT;
+    *pWSCNT = WSCNT_DATA;
+    *pProtect = 0x20;
+    pPrint->m_nRequest = pPrint->m_nGet = pPrint->m_nPut = 0;
+    pPrint->m_nBank = 0xFD;
+    *pProtect = 0;
+    *pWSCNT = nOldWSCNT;
+}
+
+static void AGBPutcInternal(const char cChr)
+{
+    volatile struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
+    u16 *pPrintBuf = (u16 *)(0x8000000 + (pPrint->m_nBank << 16));
+    u16 *pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
+    u16 nData = pPrintBuf[pPrint->m_nPut / 2];
+    *pProtect = 0x20;
+    nData = (pPrint->m_nPut & 1) ? (nData & 0xFF) | (cChr << 8) : (nData & 0xFF00) | cChr;
+    pPrintBuf[pPrint->m_nPut / 2] = nData;
+    pPrint->m_nPut++;
+    *pProtect = 0;
+}
+
+void AGBPutc(const char cChr)
+{
+    u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
+    u16 nOldWSCNT = *pWSCNT;
+    volatile struct AGBPrintStruct *pPrint;
+    *pWSCNT = WSCNT_DATA;
+    AGBPutcInternal(cChr);
+    *pWSCNT = nOldWSCNT;
+    pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
+    if (pPrint->m_nPut == ((pPrint->m_nGet - 1) & 0xFFFF))
+        AGBPrintFlush1Block();
+}
+
+void AGBPrint(const char *pBuf)
+{
+    volatile struct AGBPrintStruct *pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
+    u16 *pWSCNT = (u16 *)REG_ADDR_WAITCNT;
+    u16 nOldWSCNT = *pWSCNT;
+    *pWSCNT = WSCNT_DATA;
+    while (*pBuf)
+    {
+        AGBPutc(*pBuf);
+        pBuf++;
+    }
+    *pWSCNT = nOldWSCNT;
+}
+
+void AGBPrintf(const char *pBuf, ...)
+{
+    char bufPrint[0x100];
+    va_list vArgv;
+    va_start(vArgv, pBuf);
+    vsprintf(bufPrint, pBuf, vArgv);
+    va_end(vArgv);
+    AGBPrint(bufPrint);
+}
+
+static void AGBPrintTransferDataInternal(u32 bAllData)
+{
+    LPFN_PRINT_FLUSH lpfnFuncFlush;
+    u16 *pIME;
+    u16 nIME;
+    u16 *pWSCNT;
+    u16 nOldWSCNT;
+    u16 *pProtect;
+    volatile struct AGBPrintStruct *pPrint;
+
+    pProtect = (u16 *)AGB_PRINT_PROTECT_ADDR;
+    pPrint = (struct AGBPrintStruct *)AGB_PRINT_STRUCT_ADDR;
+    lpfnFuncFlush = (LPFN_PRINT_FLUSH)AGB_PRINT_FLUSH_ADDR;
+    pIME = (u16 *)REG_ADDR_IME;
+    nIME = *pIME;
+    pWSCNT = (u16 *)REG_ADDR_WAITCNT;
+    nOldWSCNT = *pWSCNT;
+    *pIME = nIME & ~1;
+    *pWSCNT = WSCNT_DATA;
+
+    if (bAllData)
+    {
+        while (pPrint->m_nPut != pPrint->m_nGet)
+        {
+            *pProtect = 0x20;
+            lpfnFuncFlush();
+            *pProtect = 0;
+        }
+    }
+    else if (pPrint->m_nPut != pPrint->m_nGet)
+    {
+        *pProtect = 0x20;
+        lpfnFuncFlush();
+        *pProtect = 0;
+    }
+
+    *pWSCNT = nOldWSCNT;
+    *pIME = nIME;
+}
+
+void AGBPrintFlush1Block(void)
+{
+    AGBPrintTransferDataInternal(FALSE);
+}
+
+void AGBPrintFlush(void)
+{
+    AGBPrintTransferDataInternal(TRUE);
+}
+
+void AGBAssert(const char *pFile, int nLine, const char *pExpression, int nStopProgram)
+{
+    if (nStopProgram)
+    {
+        AGBPrintf("ASSERTION FAILED  FILE=[%s] LINE=[%d]  EXP=[%s] \n", pFile, nLine, pExpression);
+        AGBPrintFlush();
+        asm(".hword 0xEFFF");
+    }
+    else
+    {
+        AGBPrintf("WARING FILE=[%s] LINE=[%d]  EXP=[%s] \n", pFile, nLine, pExpression);
+    }
+}
+
+// no$gba print functions, uncomment to use
+/*
+void NoCashGBAPrint(const char *pBuf)
+{
+    *(volatile u32*)NOCASHGBAPRINTADDR2 = (u32)pBuf;
+}
+
+void NoCashGBAPrintf(const char *pBuf, ...)
+{
+    char bufPrint[0x100];
+    va_list vArgv;
+    va_start(vArgv, pBuf);
+    vsprintf(bufPrint, pBuf, vArgv);
+    va_end(vArgv);
+    NoCashGBAPrint(bufPrint);
+}
+*/
+
+#endif
diff --git a/sym_bss.txt b/sym_bss.txt
index de452b2e7d..9a474a733a 100644
--- a/sym_bss.txt
+++ b/sym_bss.txt
@@ -198,3 +198,4 @@ gUnknown_03001300: @ 3001300
 	.include "src/siirtc.o"
 	.include "tools/agbcc/lib/libgcc.a:dp-bit.o"
 	.include "tools/agbcc/lib/libgcc.a:fp-bit.o"
+	.include "tools/agbcc/lib/libc.a:syscalls.o"