git subrepo clone https://github.com/HarbourMasters/soh.git

subrepo:
  subdir:   "soh"
  merged:   "ba904bbd0"
upstream:
  origin:   "https://github.com/HarbourMasters/soh.git"
  branch:   "master"
  commit:   "ba904bbd0"
git-subrepo:
  version:  "0.4.1"
  origin:   "???"
  commit:   "???"

soh/src/boot/is_debug.c

@@ -0,0 +1,90 @@
+#include "global.h"
+
+OSPiHandle* sISVHandle; // official name : is_Handle
+
+#define gISVDbgPrnAdrs ((ISVDbg*)0xB3FF0000)
+#define ASCII_TO_U32(a, b, c, d) ((u32)((a << 24) | (b << 16) | (c << 8) | (d << 0)))
+
+void isPrintfInit(void) {
+    sISVHandle = osCartRomInit();
+    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, 0);
+    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->get, 0);
+    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->magic, ASCII_TO_U32('I', 'S', '6', '4'));
+}
+
+void osSyncPrintfUnused(const char* fmt, ...) {
+}
+
+/*void osSyncPrintf(const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    _Printf(is_proutSyncPrintf, NULL, fmt, args);
+
+    va_end(args);
+}*/
+
+// assumption
+void rmonPrintf(const char* fmt, ...) {
+    va_list args;
+    va_start(args, fmt);
+
+    _Printf(is_proutSyncPrintf, NULL, fmt, args);
+
+    va_end(args);
+}
+
+void* is_proutSyncPrintf(void* arg, const char* str, u32 count) {
+    u32 data;
+    s32 pos;
+    s32 start;
+    s32 end;
+
+    //OTRLogString(str);
+
+    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->magic, &data);
+    if (data != ASCII_TO_U32('I', 'S', '6', '4')) {
+        return 1;
+    }
+    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->get, &data);
+    pos = data;
+    osEPiReadIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, &data);
+    start = data;
+    end = start + count;
+    if (end >= 0xFFE0) {
+        end -= 0xFFE0;
+        if (pos < end || start < pos) {
+            return 1;
+        }
+    } else {
+        if (start < pos && pos < end) {
+            return 1;
+        }
+    }
+    while (count) {
+        u32 addr = (u32)&gISVDbgPrnAdrs->data + (start & 0xFFFFFFC);
+        s32 shift = ((3 - (start & 3)) * 8);
+
+        if (*str) {
+            osEPiReadIo(sISVHandle, addr, &data);
+            osEPiWriteIo(sISVHandle, addr, (*str << shift) | (data & ~(0xFF << shift)));
+
+            start++;
+            if (start >= 0xFFE0) {
+                start -= 0xFFE0;
+            }
+        }
+        count--;
+        str++;
+    }
+    osEPiWriteIo(sISVHandle, (u32)&gISVDbgPrnAdrs->put, start);
+
+    return 1;
+}
+
+void func_80002384(const char* exp, const char* file, u32 line) {
+    osSyncPrintf("File:%s Line:%d  %s \n", file, line, exp);
+    while (true) {
+        ;
+    }
+}