From 4f5eb6caa0ea719f3590fa6a1bd326a7ddd3a175 Mon Sep 17 00:00:00 2001
From: StapleButter <thetotalworm@gmail.com>
Date: Thu, 23 Mar 2017 23:47:55 +0100
Subject: [PATCH] support for tiny EEPROM

---
 src/ARM.cpp     |  5 +++--
 src/NDSCart.cpp | 40 +++++++++++++++++++++++++++++++++++++++-
 2 files changed, 42 insertions(+), 3 deletions(-)

diff --git a/src/ARM.cpp b/src/ARM.cpp
index f15ce741..a2e00664 100644
--- a/src/ARM.cpp
+++ b/src/ARM.cpp
@@ -171,8 +171,9 @@ void ARM::JumpTo(u32 addr, bool restorecpsr)
         else                addr &= ~0x1;
     }
 
-    if (addr == 0x0201764C) printf("capture test %d: R1=%08X\n", R[6], R[1]);
-    if (addr == 0x020175D8) printf("capture test %d: res=%08X\n", R[6], R[0]);
+    // aging cart debug crap
+    //if (addr == 0x0201764C) printf("capture test %d: R1=%08X\n", R[6], R[1]);
+    //if (addr == 0x020175D8) printf("capture test %d: res=%08X\n", R[6], R[0]);
 
     if (addr & 0x1)
     {
diff --git a/src/NDSCart.cpp b/src/NDSCart.cpp
index 29da046a..615390bd 100644
--- a/src/NDSCart.cpp
+++ b/src/NDSCart.cpp
@@ -268,7 +268,45 @@ void Write_Null(u8 val, bool islast) {}
 
 void Write_EEPROMTiny(u8 val, bool islast)
 {
-    // TODO
+    switch (CurCmd)
+    {
+    case 0x02:
+    case 0x0A:
+        if (DataPos < 1)
+        {
+            Addr = val;
+            Data = 0;
+        }
+        else
+        {
+            SRAM[(Addr & 0xFF) | ((CurCmd==0x0A)?0x100:0)] = val;
+            Addr++;
+        }
+        break;
+
+    case 0x03:
+    case 0x0B:
+        if (DataPos < 1)
+        {
+            Addr = val;
+            Data = 0;
+        }
+        else
+        {
+            Data = SRAM[(Addr & 0xFF) | ((CurCmd==0x0B)?0x100:0)];
+            Addr++;
+        }
+        break;
+
+    case 0x9F:
+        Data = 0xFF;
+        break;
+
+    default:
+        if (DataPos==0)
+            printf("unknown tiny EEPROM save command %02X\n", CurCmd);
+        break;
+    }
 }
 
 void Write_EEPROM(u8 val, bool islast)