diff --git a/include/functions.h b/include/functions.h
index 8bac62abfd..069ee6b62f 100644
--- a/include/functions.h
+++ b/include/functions.h
@@ -268,7 +268,7 @@ u32 __osGetSR(void); // func_8008A5C0
 void __osSetSR(u32 value); // func_8008A5D0
 void osWritebackDCache(void *vaddr, s32 nbytes); // func_8008A5E0
 void func_8008A660(void); // func_8008A660
-void func_8008A6FC(void); // func_8008A6FC
+void osInitialize(void); // func_8008A6FC
 void func_8008A9A8(void); // func_8008A9A8
 // UNK_RET func_8008AA10(UNK_ARGS);
 void guPerspectiveF(float* mf[4], u16* perspNorm, float fovy, float aspect, float near, float far, float scale); // func_8008AA50
diff --git a/include/variables.h b/include/variables.h
index 1cc284f3ea..0686ceff5e 100644
--- a/include/variables.h
+++ b/include/variables.h
@@ -346,9 +346,9 @@
 //extern UNK_TYPE D_00ABFC00;
 //extern UNK_TYPE D_00AC0000;
 //extern UNK_TYPE D_00AC0480;
-extern UNK_TYPE D_00AC4000;
+extern UNK_TYPE D_00AC4000; // D_00AC4000
 //extern UNK_TYPE D_00ACA000;
-extern UNK_TYPE D_00ACC000;
+extern UNK_TYPE D_00ACC000; // D_00ACC000
 //extern UNK_TYPE D_00AD1000;
 //extern UNK_TYPE D_00B3B000;
 extern UNK_TYPE D_00B3C000; // D_00B3C000
@@ -1860,9 +1860,12 @@ extern UNK_TYPE D_00C7A4E0; // D_00C7A4E0
 //extern UNK_TYPE D_47803510;
 //extern UNK_TYPE D_80000000;
 extern UNK_TYPE osTvType; // D_80000300
-//extern UNK_TYPE D_80000308;
-extern UNK_TYPE D_8000030C; // D_8000030C
-extern UNK_TYPE D_80000318; // D_80000318
+extern UNK_TYPE osRomType; // D_80000304
+extern UNK_TYPE osRomBase; // D_80000308
+extern UNK_TYPE osResetType; // D_8000030C
+extern UNK_TYPE osCicId; // D_80000310
+extern UNK_TYPE osVersion; // D_80000314
+extern UNK_TYPE osMemSize; // D_80000318
 extern UNK_TYPE D_8000031C; // D_8000031C
 extern UNK_TYPE D_80000500; // D_80000500
 extern UNK_TYPE D_80025D00; // D_80025D00
@@ -2400,7 +2403,7 @@ extern s800E03A0 D_801B9F20; // D_801B9F20
 //extern UNK_TYPE D_801BDB00;
 //extern UNK_TYPE D_801BDB08;
 //extern UNK_TYPE D_801BDB18;
-extern u8 D_801BDB30[];
+extern u8 D_801BDB30[]; // D_801BDB30
 //extern UNK_TYPE D_801BDB90;
 //extern UNK_TYPE D_801BDB94;
 //extern UNK_TYPE D_801BDB98;
diff --git a/src/boot_O2_g3/boot_0x80080060.c b/src/boot_O2_g3/boot_0x80080060.c
index b02f416179..651584f8d7 100644
--- a/src/boot_O2_g3/boot_0x80080060.c
+++ b/src/boot_O2_g3/boot_0x80080060.c
@@ -3,7 +3,7 @@
 
 UNK_RET func_80080060(void) {
     func_80085320(&D_80099500, &D_80099AF0, &D_80099EF0, 0, -1, &D_80098190);
-    D_80000318 = func_8008D350();
+    osMemSize = func_8008D350();
     func_800818F4();
     osInitialize();
     osUnmapTLBAll();
diff --git a/undef.txt b/undef.txt
index 7b1be2f985..20dcf4a3d0 100644
--- a/undef.txt
+++ b/undef.txt
@@ -1851,9 +1851,12 @@ D_46FFCED0 = 0x46FFCED0;
 D_47803510 = 0x47803510;
 D_80000000 = 0x80000000;
 osTvType = 0x80000300;
-D_80000308 = 0x80000308;
-D_8000030C = 0x8000030C;
-D_80000318 = 0x80000318;
+osRomType = 0x80000304;
+osRomBase = 0x80000308;
+osResetType = 0x8000030C;
+osCicId = 0x80000310;
+osVersion = 0x80000314;
+osMemSize = 0x80000318;
 D_8000031C = 0x8000031C;
 D_80000500 = 0x80000500;
 D_80025D00 = 0x80025D00;
diff --git a/variables.py b/variables.py
index 5dadc2b2f2..8fea117730 100644
--- a/variables.py
+++ b/variables.py
@@ -3,11 +3,15 @@ known_vars = {
     0x00ACC000:("","UNK_TYPE",False), # this seems low
     0x00B3C000:("","UNK_TYPE",False), # this seems low
     0x00C7A4E0:("","UNK_TYPE",False), # this seems low
-    0x80000300:("osTvType","UNK_TYPE",False), # this seems low, but maybe it's set on boot?
-    0x8000030C:("","UNK_TYPE",False), # this seems low
-    0x80000318:("","UNK_TYPE",False), # this seems low
-    0x8000031C:("","UNK_TYPE",False), # this seems low
-    0x80000500:("","UNK_TYPE",False), # this seems low
+    0x80000300:("osTvType","UNK_TYPE",False),
+    0x80000304:("osRomType","UNK_TYPE",False),
+    0x80000308:("osRomBase","UNK_TYPE",False),
+    0x8000030C:("osResetType","UNK_TYPE",False),
+    0x80000310:("osCicId","UNK_TYPE",False),
+    0x80000314:("osVersion","UNK_TYPE",False),
+    0x80000318:("osMemSize","UNK_TYPE",False),
+    0x8000031C:("","UNK_TYPE",False),
+    0x80000500:("","UNK_TYPE",False),
     0x80025D00:("","UNK_TYPE",False),
     0x80096B20:("","u8",False),
     0x80096B24:("","u8*",False),