Start decompiling logo.c

asm/logo.s

@@ -337,144 +337,3 @@ sub_081389FC: @ 0x081389FC
 	.align 2, 0
 _08138A28: .4byte 0x000001FF
 _08138A2C: .4byte 0x01000400
-
-	thumb_func_start sub_08138A30
-sub_08138A30: @ 0x08138A30
-	push {r4, r5, r6, r7, lr}
-	lsls r0, r0, #0x18
-	lsls r1, r1, #0x10
-	lsls r2, r2, #0x10
-	ldr r3, _08138A9C @ =gUnk_082D7850
-	lsrs r1, r1, #0xe
-	adds r1, r1, r3
-	ldr r1, [r1]
-	ldr r4, [r1, #8]
-	ldr r7, [r1, #0x18]
-	ldrh r5, [r1, #2]
-	ldr r1, _08138AA0 @ =gBgCntRegs
-	lsrs r0, r0, #0x17
-	adds r0, r0, r1
-	ldrh r0, [r0]
-	lsls r0, r0, #0x10
-	lsrs r1, r0, #0x12
-	movs r3, #3
-	ands r1, r3
-	lsrs r0, r0, #0x18
-	movs r3, #0x1f
-	ands r0, r3
-	lsls r0, r0, #0xb
-	lsrs r2, r2, #0x13
-	lsls r2, r2, #6
-	movs r3, #0xc0
-	lsls r3, r3, #0x13
-	adds r2, r2, r3
-	adds r6, r0, r2
-	lsls r1, r1, #0xe
-	adds r1, r1, r3
-	adds r0, r4, #0
-	bl LZ77UnCompVram
-	movs r4, #0
-	cmp r4, r5
-	bhs _08138A96
-_08138A7A:
-	lsls r0, r4, #4
-	subs r0, r0, r4
-	lsls r0, r0, #2
-	adds r0, r7, r0
-	lsls r1, r4, #6
-	adds r1, r6, r1
-	movs r2, #0x1e
-	bl CpuSet
-	adds r0, r4, #1
-	lsls r0, r0, #0x10
-	lsrs r4, r0, #0x10
-	cmp r4, r5
-	blo _08138A7A
-_08138A96:
-	pop {r4, r5, r6, r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08138A9C: .4byte gUnk_082D7850
-_08138AA0: .4byte gBgCntRegs
-
-	thumb_func_start sub_08138AA4
-sub_08138AA4: @ 0x08138AA4
-	push {r4, r5, r6, r7, lr}
-	mov r7, sl
-	mov r6, sb
-	mov r5, r8
-	push {r5, r6, r7}
-	lsls r0, r0, #0x10
-	lsrs r5, r0, #0x10
-	mov ip, r5
-	lsls r1, r1, #0x18
-	lsrs r6, r1, #0x18
-	mov r8, r6
-	lsls r2, r2, #0x18
-	lsrs r7, r2, #0x18
-	mov sb, r7
-	lsls r3, r3, #0x10
-	lsrs r2, r3, #0x10
-	adds r3, r2, #0
-	cmp r2, #0
-	beq _08138B2A
-	ldr r0, _08138AF0 @ =gUnk_03002440
-	mov sl, r0
-	ldr r4, [r0]
-	movs r0, #0x80
-	lsls r0, r0, #9
-	ands r0, r4
-	cmp r0, #0
-	beq _08138AF8
-	ldr r1, _08138AF4 @ =gUnk_082D7850
-	lsls r0, r5, #2
-	adds r0, r0, r1
-	ldr r0, [r0]
-	lsls r1, r6, #1
-	ldr r0, [r0, #0x10]
-	adds r0, r0, r1
-	adds r1, r7, #0
-	bl sub_08158334
-	b _08138B2A
-	.align 2, 0
-_08138AF0: .4byte gUnk_03002440
-_08138AF4: .4byte gUnk_082D7850
-_08138AF8:
-	ldr r2, _08138B38 @ =0x040000D4
-	ldr r1, _08138B3C @ =gUnk_082D7850
-	mov r5, ip
-	lsls r0, r5, #2
-	adds r0, r0, r1
-	ldr r0, [r0]
-	mov r5, r8
-	lsls r1, r5, #1
-	ldr r0, [r0, #0x10]
-	adds r0, r0, r1
-	str r0, [r2]
-	mov r1, sb
-	lsls r0, r1, #1
-	ldr r1, _08138B40 @ =gBgPalette
-	adds r0, r0, r1
-	str r0, [r2, #4]
-	movs r0, #0x80
-	lsls r0, r0, #0x18
-	orrs r3, r0
-	str r3, [r2, #8]
-	ldr r0, [r2, #8]
-	movs r0, #1
-	orrs r4, r0
-	mov r5, sl
-	str r4, [r5]
-_08138B2A:
-	pop {r3, r4, r5}
-	mov r8, r3
-	mov sb, r4
-	mov sl, r5
-	pop {r4, r5, r6, r7}
-	pop {r0}
-	bx r0
-	.align 2, 0
-_08138B38: .4byte 0x040000D4
-_08138B3C: .4byte gUnk_082D7850
-_08138B40: .4byte gBgPalette

include/logo.h

@@ -0,0 +1,22 @@
+#ifndef GUARD_LOGO_H
+#define GUARD_LOGO_H
+
+#include "global.h"
+
+struct Unk_082D7850 {
+    u8 filler0[2];
+    u16 unk2;
+    u8 filler4[4];
+    u32 unk8;
+    u8 fillerC[4];
+    u16* unk10;
+    u8 filler14[4];
+    u32 unk18;
+};
+
+extern struct Unk_082D7850* gUnk_082D7850[];
+extern u16 gBgCntRegs[4];
+extern u16 gBgPalette[];
+extern u32 gUnk_03002440;
+
+#endif

linker.ld

@@ -282,6 +282,7 @@ SECTIONS {
         asm/code_0803024C.o(.text);
         asm/code_08030C94.o(.text);
         asm/logo.o(.text);
+        src/logo.o(.text);
         asm/code_08138B44.o(.text);
         asm/m4a_asm.o(.text);
         src/m4a.o(.text);

src/logo.c

@@ -0,0 +1,32 @@
+#include "global.h"
+#include "logo.h"
+
+void sub_08138A30(u8 arg0, u16 arg1, u16 arg2) {
+    u16 i;
+    u16 r5, r1_2, r0_2;
+    u32 r4, r7, r6;
+    struct Unk_082D7850* r1 = gUnk_082D7850[arg1];
+    r4 = r1->unk8;
+    r7 = r1->unk18;
+    r5 = r1->unk2;
+    r1_2 = (gBgCntRegs[arg0] >> 2) & 3;
+    r0_2 = (gBgCntRegs[arg0] >> 8) & 0x1f;
+    r6 = VRAM + (r0_2 << 0xb) + (arg2 >> 3 << 6);
+    LZ77UnCompVram(r4, (r1_2 << 0xe) + VRAM);
+    for (i = 0; i < r5; i++) {
+        CpuCopy16(r7 + (i * 60), r6 + (i * 64), 0x3c);
+    }
+}
+
+void sub_08138AA4(u16 arg0, u8 arg1, u8 arg2, u16 arg3) {
+    asm("":::"r4");
+    if (arg3 != 0) {
+        if (gUnk_03002440 & 0x10000) {
+            sub_08158334(gUnk_082D7850[arg0]->unk10 + arg1, arg2, arg3);
+        }
+        else {
+            DmaCopy16(3, gUnk_082D7850[arg0]->unk10 + arg1, gBgPalette + arg2, arg3 * 2);
+            gUnk_03002440 |= 1;
+        }
+    }
+}