From eb1c7d07434871e0611adfe94fe9ed7403538cbe Mon Sep 17 00:00:00 2001
From: Alex Eckhart <eckhartalex@gmail.com>
Date: Sat, 6 Feb 2016 11:38:15 -0700
Subject: [PATCH] Fix some sram games(ffv) Also added kinda-working eeprom
 support

---
 agb_inject/source/agb_inject.c | 33 ++++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

diff --git a/agb_inject/source/agb_inject.c b/agb_inject/source/agb_inject.c
index 079e0e7..5596edd 100644
--- a/agb_inject/source/agb_inject.c
+++ b/agb_inject/source/agb_inject.c
@@ -2,15 +2,16 @@
 #include <stdio.h>
 #include <string.h>
 
+u8 const *save = (void *)0x8020000;
+
 void sram() {
-	u8 const *save = (void *)0x8020000;
-	
 	u8 volatile *sram = (void *)SRAM;
 	int x;
-	for(x = 0; x <= 32768; x++) {
+	for(x = 0; x <= 0x7FFE; x++) {
 		sram[x] = save[x];
 	}
 }
+
 void inline flash_command(u8 command) {
 	u8 volatile *command_addr1 = (void *)0xE005555;
 	u8 volatile *command_addr2 = (void *)0xE002AAA;
@@ -20,7 +21,6 @@ void inline flash_command(u8 command) {
 }
 
 void flash() {
-	u8 const *save = (void *)0x8020000;
 	u8 volatile *flash = (void *)0xE000000;
 	flash_command(0x90); // Enter id mode
 	flash[0]; // read manufacuer
@@ -37,6 +37,26 @@ void flash() {
 	}
 } 
 
+void eeprom() {
+	u16 buffer[73];
+	memset(buffer, 0, sizeof(u16) * 73);
+	u16 x;
+	int z;
+	for(x = 0; x <= 512; x += 8) {
+		for(z = 0; z <= 64; z++) {
+			if ((save[x + (z / 8)] & 1 << z % 8) != 0) {
+				buffer[z + 1] = 1;
+			}
+		}
+		for(z = 65; z <= 71; z++) {
+			buffer[z] = x & 1 << z % 8;
+		}
+		buffer[72] = 1;
+		dmaCopy(buffer, (void *)0xDFFFF00, 73 << 1);
+		while((*(u8 *)0xDFFFF00 & 1) != 1); // Wait for data to be written.
+	}
+}
+
 int main() {
 	u8 savetype = *(u8 *)0x801FFFF;
 	irqInit();
@@ -46,8 +66,11 @@ int main() {
 	
 	if (savetype == 0) {
 		sram();
-	} else {
+	} else if (savetype == 1) {
 		flash();
+	} else if (savetype == 2) {
+		eeprom();
 	}
 	iprintf("AGB_FIRM save injector\n");
+	while(1);
 }