initial untested Switch Block implementation

1 files changed, 72 insertions, 0 deletions

diff --git a/src/switchblock.S b/src/switchblock.S
new file mode 100644
index 0000000..f219ee4
--- /dev/null
+++ b/src/switchblock.S
@@ -0,0 +1,72 @@
+.text
+
+#ifndef __MWERKS__
+.set r0,0;   .set r1,1;   .set r2,2; .set r3,3;   .set r4,4
+.set r5,5;   .set r6,6;   .set r7,7;   .set r8,8;   .set r9,9
+.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14
+.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19
+.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24
+.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29
+.set r30,30; .set r31,31; .set f0,0; .set f2,2; .set f3,3
+#endif
+
+.align 4
+.extern GameMgr
+.extern BG_GM_ptr
+
+.global BG_GM_InitRedSwitchFlag_Patch
+BG_GM_InitRedSwitchFlag_Patch:
+	lis r5, GameMgr@h
+	ori r5, r5, GameMgr@l
+	lwz r5, 0(r5)
+
+	addis r4, r3, 9
+	lbz r0, 0x380(r5)
+	stb r0, 0xAA8(r4)
+	blr
+
+.global ProcessTileNum_EndPatch
+ProcessTileNum_EndPatch:
+	lis r5, BG_GM_ptr@h
+	ori r5, r5, BG_GM_ptr@l
+	lwz r5, 0(r5)
+	addis r5, r5, 9
+	lbz r5, 0xAA8(r3)
+
+	cmplwi r30, 0x58
+	bne not_red
+	andi. r3, r5, 1
+	beq not_red
+	li r3, 0x57
+	b ptnReturn
+not_red:
+	cmplwi r30, 0x5A
+	bne not_green
+	andi. r3, r5, 2
+	beq not_green
+	li r3, 0x59
+	b ptnReturn
+not_green:
+	cmplwi r30, 0x56
+	bne not_yellow
+	andi. r3, r5, 4
+	beq not_yellow
+	li r3, 0x55
+	b ptnReturn
+not_yellow:
+	cmplwi r30, 0x54
+	bne not_blue
+	andi. r3, r5, 8
+	beq not_blue
+	li r3, 0x53
+	b ptnReturn
+not_blue:
+	mr r3, r30
+ptnReturn:
+	lwz r0, 0x14(r1)
+	lwz r31, 0xC(r1)
+	lwz r30, 0x8(r1)
+	mtlr r0
+	addi sp, sp, 0x10
+	blr
+