At least note GBA port in readme

misc/gba/Makefile

@@ -40,16 +40,11 @@ CFLAGS	= -g -Wall -O2 -DPLAT_GBA -ffunction-sections -fdata-sections -mcpu=arm7t
 ASFLAGS	= -g $(ARCH)
 
 LDFLAGS	= -specs=gba.specs -g $(ARCH)
-LIBS	= -ltonc
 
 LIBGBA		:= $(DEVKITPRO)/libgba
 INCLUDES 	+= $(foreach dir, $(LIBGBA), -I$(dir)/include)
 LDFLAGS 	+= $(foreach dir, $(LIBGBA), -L$(dir)/lib)
 
-LIBTONC		= $(DEVKITPRO)/libtonc
-INCLUDES 	+= $(foreach dir, $(LIBTONC), -I$(dir)/include)
-LDFLAGS 	+= $(foreach dir, $(LIBTONC), -L$(dir)/lib)
-
 
 #---------------------------------------------------------------------------------
 # Compiler tools
@@ -94,6 +89,9 @@ $(BUILD_DIR)/%.o: src/%.c
 $(BUILD_DIR)/%.o: src/gba/%.c
 	$(ARM_CC) $(CFLAGS) $(INCLUDES) $(DEPFLAGS) -c $< -o $@
 
+$(BUILD_DIR)/%.o: src/gba/%.S
+	$(ARM_CC) $(CFLAGS) $(INCLUDES) $(DEPFLAGS) -c $< -o $@
+
 
 #---------------------------------------------------------------------------------
 # Dependency tracking

readme.md

@@ -259,6 +259,14 @@ Run `make ds`. You'll need [BlocksDS](https://github.com/blocksds/sdk)
 
 Run `make n64`. You'll need the opengl branch of [libdragon](https://github.com/DragonMinded/libdragon/tree/opengl)
 
+#### GBA
+
+Run `make gba`. You'll need [libgba](https://github.com/devkitPro/libgba)
+
+**NOTE: It is highly recommended that you install the precompiled devkitpro packages from [here](https://devkitpro.org/wiki/Getting_Started) - you need the `gba-dev` group)**
+
+**NOTE: The GBA port has terrible performance and is unusable in practice.**
+
 </details>
 
 
@@ -462,6 +470,8 @@ Further information (e.g. style) for ClassiCube's source code can be found in th
 * [ares](https://github.com/ares-emulator/ares) - Emulator used to test Nintendo 64 port
 * [BlocksDS](https://github.com/blocksds/sdk) - Backend for Nintendo DS
 * [melonDS](https://github.com/melonDS-emu/melonDS) - Emulator used to test Nintendo DS port
+* [libgba](https://github.com/devkitPro/libgba) - Backend for GBA
+* [mGBA](https://github.com/mgba-emu/mgba) - Emulator used to test GBA port
 * [vitasdk](https://github.com/vitasdk) - Backend for PS Vita
 * [Vita3K](https://github.com/Vita3K/Vita3K) - Emulator used to test Vita port
 * [pspsdk](https://github.com/pspdev/pspsdk) - Backend for PSP

src/gba/NocashLog.S

@@ -0,0 +1,22 @@
+.global nocash_log
+.global nocash_msg
+
+// BEG nocash_log
+.section .ewram,"ax",%progbits
+.thumb_func
+.align 2
+
+// nocash looks for this specific pattern
+nocash_log:
+	mov 	r12, r12
+	b		nocash_log_return
+	.short	0x6464, 0x0000
+nocash_msg:
+	.space	82
+
+nocash_log_return:
+	bx		lr
+
+.size nocash_log, .-nocash_log
+.type nocash_log, %function
+// END nocash_log

src/gba/Platform_GBA.c

@@ -139,35 +139,53 @@ cc_uint64 Stopwatch_Measure(void) {
 	return base_time + raw;
 }
 
-extern int nocash_puts(const char *str);
-static void Log_Nocash(char* buffer) {
-	nocash_puts(buffer);
-}
-
 #define MGBA_LOG_DEBUG 4
 #define REG_DEBUG_ENABLE (vu16*)0x4FFF780
 #define REG_DEBUG_FLAGS  (vu16*)0x4FFF700
 #define REG_DEBUG_STRING (char*)0x4FFF600
 
-static void Log_mgba(char* buffer, int len) {
+static void Log_mgba(const char* msg, int len) {
 	*REG_DEBUG_ENABLE = 0xC0DE;
 	// Check if actually emulated or not
 	if (*REG_DEBUG_ENABLE != 0x1DEA) return;
 
-	Mem_Copy(REG_DEBUG_STRING, buffer, len);
+	while (len)
+	{
+    	// Can only be up to 120 bytes total
+		int bit   = min(len, 119);
+		char* dst = REG_DEBUG_STRING;
+
+		Mem_Copy(dst, msg, bit);
+		dst[bit] = '\0';
+
 		*REG_DEBUG_FLAGS = MGBA_LOG_DEBUG | 0x100;
+		msg += bit; len -= bit;
+	}
 }
 
-void Platform_Log(const char* msg, int len) {
-    // Can only be up to 120 bytes total
-	char buffer[120];
-	len = min(len, 118);
+// Log to nocash debugger
+extern char nocash_msg[82];
+extern void nocash_log(void);
 
-	Mem_Copy(buffer, msg, len);
-	buffer[len + 0] = '\n';
-	buffer[len + 1] = '\0';
-	Log_Nocash(buffer);
-	Log_mgba(buffer, len);
+static void Log_Nocash(const char* msg, int len) {
+	while (len)
+	{
+    	// Can only be up to 80 bytes total
+		int bit   = min(len, 80);
+		char* dst = nocash_msg;
+
+		Mem_Copy(dst, msg, bit);
+		dst[bit + 0] = '\0';
+
+		nocash_log();
+		msg += bit; len -= bit;
+	}
+}
+
+
+void Platform_Log(const char* msg, int len) {
+	Log_mgba(msg, len);
+    Log_Nocash(msg, len);
 }
 
 TimeMS DateTime_CurrentUTC(void) {