through sub_800A0AC

asm/link.s

@@ -5,155 +5,6 @@
 
 	.text
 
-	thumb_func_start GetLinkPlayerCount
-GetLinkPlayerCount: @ 8009FCC
-	push {lr}
-	ldr r0, =gLinkVSyncDisabled
-	ldrb r0, [r0]
-	cmp r0, 0
-	bne _08009FEC
-	ldr r0, =gUnknown_030030E0
-	ldr r0, [r0]
-	movs r1, 0x1C
-	ands r0, r1
-	lsrs r0, 2
-	b _08009FF4
-	.pool
-_08009FEC:
-	bl sub_80104F4
-	lsls r0, 24
-	lsrs r0, 24
-_08009FF4:
-	pop {r1}
-	bx r1
-	thumb_func_end GetLinkPlayerCount
-
-	thumb_func_start sub_8009FF8
-sub_8009FF8: @ 8009FF8
-	push {r4-r7,lr}
-	adds r6, r0, 0
-	adds r5, r1, 0
-	bl GetLinkPlayerCount
-	lsls r0, 24
-	lsrs r4, r0, 24
-	movs r2, 0
-	cmp r2, r4
-	bge _0800A030
-	movs r7, 0xFF
-	ldr r3, =gLinkPlayers
-_0800A010:
-	ldrh r0, [r3]
-	adds r1, r7, 0
-	ands r1, r0
-	cmp r1, r6
-	beq _0800A01E
-	cmp r1, r5
-	bne _0800A028
-_0800A01E:
-	movs r0, 0x1
-	b _0800A034
-	.pool
-_0800A028:
-	adds r3, 0x1C
-	adds r2, 0x1
-	cmp r2, r4
-	blt _0800A010
-_0800A030:
-	movs r0, 0x1
-	negs r0, r0
-_0800A034:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_8009FF8
-
-	thumb_func_start sub_800A03C
-sub_800A03C: @ 800A03C
-	movs r0, 0x2
-	bx lr
-	thumb_func_end sub_800A03C
-
-	thumb_func_start sub_800A040
-sub_800A040: @ 800A040
-	push {lr}
-	bl GetLinkPlayerCount
-	lsls r0, 24
-	lsrs r0, 24
-	cmp r0, 0x4
-	bne _0800A05A
-	movs r0, 0x2
-	movs r1, 0x1
-	bl sub_8009FF8
-	cmp r0, 0
-	bge _0800A05E
-_0800A05A:
-	movs r0, 0
-	b _0800A060
-_0800A05E:
-	movs r0, 0x1
-_0800A060:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_800A040
-
-	thumb_func_start sub_800A064
-sub_800A064: @ 800A064
-	push {lr}
-	movs r0, 0x2
-	movs r1, 0x1
-	bl sub_8009FF8
-	cmp r0, 0
-	bge _0800A076
-	movs r0, 0
-	b _0800A078
-_0800A076:
-	movs r0, 0x1
-_0800A078:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_800A064
-
-	thumb_func_start sub_800A07C
-sub_800A07C: @ 800A07C
-	push {lr}
-	movs r0, 0x4
-	movs r1, 0x5
-	bl sub_8009FF8
-	adds r2, r0, 0
-	cmp r2, 0
-	blt _0800A0A4
-	ldr r0, =gLinkPlayers
-	lsls r1, r2, 3
-	subs r1, r2
-	lsls r1, 2
-	adds r1, r0
-	ldrh r0, [r1, 0x1A]
-	cmp r0, 0x1
-	bne _0800A0A4
-	movs r0, 0x1
-	b _0800A0A6
-	.pool
-_0800A0A4:
-	movs r0, 0
-_0800A0A6:
-	pop {r1}
-	bx r1
-	thumb_func_end sub_800A07C
-
-	thumb_func_start sub_800A0AC
-sub_800A0AC: @ 800A0AC
-	push {lr}
-	ldr r0, =gUnknown_03000D5C
-	movs r1, 0
-	str r1, [r0]
-	ldr r0, =gUnknown_020229C8
-	strh r1, [r0]
-	bl sub_8009734
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_800A0AC
-
 	thumb_func_start sub_800A0C8
 sub_800A0C8: @ 800A0C8
 	push {r4-r7,lr}

include/global.h

@@ -51,6 +51,7 @@ enum LanguageId {
     LANGUAGE_GERMAN = 5,
 };
 
+#define GAME_VERSION (VERSION_EMERALD)
 #define GAME_LANGUAGE (LANGUAGE_ENGLISH)
 
 enum

src/link.c

@@ -101,6 +101,7 @@ u8 gUnknown_020223BC = 0;
 u8 gUnknown_020223BD = 0;
 bool8 gUnknown_020229C4 = FALSE;
 u16 gUnknown_020229C6 = 0;
+u16 gUnknown_020229C8 = 0;
 struct LinkPlayer gUnknown_020229CC = {};
 
 // Static ROM declarations
@@ -131,6 +132,7 @@ void sub_800EDD4(void);
 bool32 sub_800F7E4(void);
 void sub_800F804(void);
 void Rfu_set_zero(void);
+u8 sub_80104F4(void);
 
 // .rodata
 
@@ -699,3 +701,70 @@ void sub_8009FAC(void)
         gUnknown_03003140 = NULL;
     }
 }
+
+u8 GetLinkPlayerCount(void)
+{
+    if (gLinkVSyncDisabled)
+    {
+        return sub_80104F4();
+    }
+    return EXTRACT_PLAYER_COUNT(gUnknown_030030E0);
+}
+
+int sub_8009FF8(u32 version1, u32 version2)
+{
+    int i;
+    u8 nPlayers;
+
+    nPlayers = GetLinkPlayerCount();
+    for (i = 0; i < nPlayers; i ++)
+    {
+        if ((gLinkPlayers[i].version & 0xFF) == version1 || (gLinkPlayers[i].version & 0xFF) == version2)
+        {
+            return 1;
+        }
+    }
+    return -1;
+}
+
+u32 sub_800A03C(void)
+{
+    return 2;
+}
+
+bool32 sub_800A040(void)
+{
+    if (GetLinkPlayerCount() != 4 || sub_8009FF8(VERSION_RUBY, VERSION_SAPPHIRE) < 0)
+    {
+        return FALSE;
+    }
+    return TRUE;
+}
+
+bool32 sub_800A064(void)
+{
+    if (sub_8009FF8(VERSION_RUBY, VERSION_SAPPHIRE) >= 0)
+    {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+bool32 sub_800A07C(void)
+{
+    int i;
+
+    i = sub_8009FF8(VERSION_FIRE_RED, VERSION_LEAF_GREEN);
+    if (i >= 0 && gLinkPlayers[i].language == LANGUAGE_JAPANESE)
+    {
+        return TRUE;
+    }
+    return FALSE;
+}
+
+void sub_800A0AC(void)
+{
+    gUnknown_03000D5C = 0;
+    gUnknown_020229C8 = 0;
+    sub_8009734();
+}