diff --git a/src/link.c b/src/link.c
new file mode 100644
index 000000000..ae2cd1992
--- /dev/null
+++ b/src/link.c
@@ -0,0 +1,56 @@
+
+// Includes
+#include "global.h"
+
+// Static type declarations
+
+struct BlockTransfer
+{
+    u16 pos;
+    u16 size;
+    void *src;
+    bool8 active;
+    u8 multiplayerId;
+};
+
+struct LinkTestBGInfo
+{
+    u32 screenBaseBlock;
+    u32 paletteNum;
+    u32 dummy_8;
+    u32 dummy_C;
+};
+
+// Static RAM declarations
+
+IWRAM_DATA struct BlockTransfer gUnknown_03000D10;
+IWRAM_DATA u32 link_c_unused_03000d1c;
+IWRAM_DATA struct BlockTransfer gUnknown_03000D20[4];
+IWRAM_DATA u32 gUnknown_03000D50;
+IWRAM_DATA u32 gUnknown_03000D54;
+IWRAM_DATA u8 gUnknown_03000D58;
+IWRAM_DATA u32 gUnknown_03000D5C;
+IWRAM_DATA u32 gUnknown_03000D60;
+IWRAM_DATA u8 gUnknown_03000D64[4]; // not really, but won't match otherwise
+IWRAM_DATA u8 gUnknown_03000D68[4];
+IWRAM_DATA u8 gUnknown_03000D6C;
+IWRAM_DATA bool8 gUnknown_03000D6D;
+IWRAM_DATA u16 gUnknown_03000D6E;
+IWRAM_DATA u16 gUnknown_03000D70;
+IWRAM_DATA u8 gUnknown_03000D72;
+IWRAM_DATA u8 gUnknown_03000D73;
+IWRAM_DATA u8 gUnknown_03000D74[4]; // not really, but won't match otherwise
+IWRAM_DATA u8 gUnknown_03000D78[8]; // not really, but won't match otherwise
+IWRAM_DATA u8 gUnknown_03000D80[16];
+IWRAM_DATA u16 gUnknown_03000D90[8];
+IWRAM_DATA u32 gUnknown_03000DA0;
+IWRAM_DATA u32 gUnknown_03000DA4;
+IWRAM_DATA void *gUnknown_03000DA8;
+IWRAM_DATA void *gUnknown_03000DAC;
+IWRAM_DATA bool32 gUnknown_03000DB0;
+
+// Static ROM declarations
+
+// .rodata
+
+// .text
diff --git a/sym_bss.txt b/sym_bss.txt
index 2cc5279f3..efd129fd7 100644
--- a/sym_bss.txt
+++ b/sym_bss.txt
@@ -6,79 +6,7 @@ gUnknown_03000000: @ 3000000
     .include "src/bg.o"
 	.include "src/text.o"
 	.include "src/sprite.o"
-
-gUnknown_03000D10: @ 3000D10
-	.space 0x10
-
-gUnknown_03000D20: @ 3000D20
-	.space 0x30
-
-gUnknown_03000D50: @ 3000D50
-	.space 0x4
-
-gUnknown_03000D54: @ 3000D54
-	.space 0x4
-
-gUnknown_03000D58: @ 3000D58
-	.space 0x4
-
-gUnknown_03000D5C: @ 3000D5C
-	.space 0x4
-
-gUnknown_03000D60: @ 3000D60
-	.space 0x4
-
-gUnknown_03000D64: @ 3000D64
-	.space 0x4
-
-gUnknown_03000D68: @ 3000D68
-	.space 0x4
-
-gUnknown_03000D6C: @ 3000D6C
-	.space 0x1
-
-gUnknown_03000D6D: @ 3000D6D
-	.space 0x1
-
-gUnknown_03000D6E: @ 3000D6E
-	.space 0x2
-
-gUnknown_03000D70: @ 3000D70
-	.space 0x2
-
-gUnknown_03000D72: @ 3000D72
-	.space 0x1
-
-gUnknown_03000D73: @ 3000D73
-	.space 0x1
-
-gUnknown_03000D74: @ 3000D74
-	.space 0x4
-
-gUnknown_03000D78: @ 3000D78
-	.space 0x8
-
-gUnknown_03000D80: @ 3000D80
-	.space 0x10
-
-gUnknown_03000D90: @ 3000D90
-	.space 0x10
-
-gUnknown_03000DA0: @ 3000DA0
-	.space 0x4
-
-gUnknown_03000DA4: @ 3000DA4
-	.space 0x4
-
-gUnknown_03000DA8: @ 3000DA8
-	.space 0x4
-
-gUnknown_03000DAC: @ 3000DAC
-	.space 0x4
-
-gUnknown_03000DB0: @ 3000DB0
-	.space 0x8
-
+    .include "src/link.o"
     .include "src/rtc.o"
 
 gUnknown_03000DD0: @ 3000DD0