From 089ba86faf70be52e25eef5bbfbeb54439ea67f6 Mon Sep 17 00:00:00 2001
From: FIX94 <fix94.1@gmail.com>
Date: Sun, 10 Apr 2016 16:14:38 +0200
Subject: added gba bios dumping

---
 gba/source/main.c | 30 ++++++++++++++++++++++++++++--
 source/main.c     | 41 +++++++++++++++++++++++++++++++++++++++--
 2 files changed, 67 insertions(+), 4 deletions(-)

diff --git a/gba/source/main.c b/gba/source/main.c
index 49cf2a1..d3782a6 100644
--- a/gba/source/main.c
+++ b/gba/source/main.c
@@ -56,7 +56,7 @@ int main(void) {
 	// ansi escape sequence to set print co-ordinates
 	// /x1b[line;columnH
 	u32 i;
-	iprintf("\x1b[9;2HGBA Link Cable Dumper v1.3\n");
+	iprintf("\x1b[9;2HGBA Link Cable Dumper v1.4\n");
 	iprintf("\x1b[10;4HPlease look at the TV\n");
 	// disable this, needs power
 	SNDSTAT = 0;
@@ -66,7 +66,7 @@ int main(void) {
 	//clear out previous messages
 	REG_HS_CTRL |= JOY_RW;
 	while (1) {
-		if((REG_HS_CTRL&JOY_READ))
+		if(REG_HS_CTRL&JOY_READ)
 		{
 			REG_HS_CTRL |= JOY_RW;
 			s32 gamesize = getGameSize();
@@ -199,6 +199,32 @@ int main(void) {
 			}
 			REG_JOYTR = 0;
 		}
+		else if(REG_HS_CTRL&JOY_WRITE)
+		{
+			REG_HS_CTRL |= JOY_RW;
+			u32 choseval = REG_JOYRE;
+			if(choseval == 4)
+			{
+				//disable interrupts
+				u32 prevIrqMask = REG_IME;
+				REG_IME = 0;
+				//dump BIOS
+				for (i = 0; i < 0x4000; i+=4)
+				{
+					// the lower bits are inaccurate, so just get it four times :)
+					u32 a = MidiKey2Freq((WaveData *)(i-4), 180-12, 0) * 2;
+					u32 b = MidiKey2Freq((WaveData *)(i-3), 180-12, 0) * 2;
+					u32 c = MidiKey2Freq((WaveData *)(i-2), 180-12, 0) * 2;
+					u32 d = MidiKey2Freq((WaveData *)(i-1), 180-12, 0) * 2;
+					REG_JOYTR = ((a>>24<<24) | (d>>24<<16) | (c>>24<<8) | (b>>24));
+					while((REG_HS_CTRL&JOY_READ) == 0) ;
+					REG_HS_CTRL |= JOY_RW;
+				}
+				//restore interrupts
+				REG_IME = prevIrqMask;
+			}
+			REG_JOYTR = 0;
+		}
 		Halt();
 	}
 }
diff --git a/source/main.c b/source/main.c
index 6c34b92..f57aa6f 100644
--- a/source/main.c
+++ b/source/main.c
@@ -23,8 +23,9 @@ void printmain()
 {
 	printf("\x1b[2J");
 	printf("\x1b[37m");
-	printf("GBA Link Cable Dumper v1.3 by FIX94\n");
+	printf("GBA Link Cable Dumper v1.4 by FIX94\n");
 	printf("Save Support based on SendSave by Chishm\n");
+	printf("GBA BIOS Dumper by Dark Fader\n \n");
 }
 
 u8 *resbuf,*cmdbuf;
@@ -312,7 +313,8 @@ int main(int argc, char *argv[])
 			while(1)
 			{
 				printmain();
-				printf("Press A once you have a GBA Game inserted.\n \n");
+				printf("Press A once you have a GBA Game inserted.\n");
+				printf("Press Y to backup the GBA BIOS.\n \n");
 				PAD_ScanPads();
 				VIDEO_WaitVSync();
 				u32 btns = PAD_ButtonsDown(0);
@@ -512,6 +514,41 @@ int main(int argc, char *argv[])
 						}
 					}
 				}
+				else if(btns&PAD_BUTTON_Y)
+				{
+					char biosname[64];
+					sprintf(biosname,"/dumps/gba_bios.bin");
+					FILE *f = fopen(biosname,"rb");
+					if(f)
+					{
+						fclose(f);
+						warnError("ERROR: BIOS already backed up!\n");
+					}
+					else
+					{
+						//create base file with size
+						printf("Preparing file...\n");
+						createFile(biosname,0x4000);
+						f = fopen(biosname,"wb");
+						if(!f)
+							fatalError("ERROR: Could not create file! Exit...");
+						//send over bios dump command
+						sendsafe_wait(4);
+						//the gba might still be in a loop itself
+						VIDEO_WaitVSync(); VIDEO_WaitVSync();
+						VIDEO_WaitVSync(); VIDEO_WaitVSync();
+						VIDEO_WaitVSync(); VIDEO_WaitVSync();
+						//lets go!
+						printf("Dumping...\n");
+						for(i = 0; i < 0x4000; i+=4)
+							*(vu32*)(testdump+i) = recvsafe();
+						fwrite(testdump,0x4000,1,f);
+						printf("Closing file\n");
+						fclose(f);
+						printf("BIOS dumped!\n");
+						sleep(5);
+					}
+				}
 			}
 		}
 	}
-- 
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