Decompile ereader.c up to faraway island code

8 files changed, 578 insertions, 1185 deletions

diff --git a/asm/rom_81D1C44.s b/asm/ereader.s
index 001ac1b68..81264aca2 100644
--- a/asm/rom_81D1C44.s
+++ b/asm/ereader.s
@@ -6,1183 +6,6 @@
 
 	.text
 
-	thumb_func_start sub_81D38D4
-sub_81D38D4: @ 81D38D4
-	push {lr}
-	ldr r0, =gSaveBlock1Ptr
-	ldr r0, [r0]
-	ldr r1, =0x00003d6d
-	adds r0, r1
-	ldrb r1, [r0]
-	adds r2, r1, 0x1
-	adds r0, r2, 0
-	asrs r0, 8
-	lsls r0, 8
-	subs r0, r2, r0
-	lsls r0, 24
-	lsrs r0, 24
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D38D4
-
-	thumb_func_start sub_81D38FC
-sub_81D38FC: @ 81D38FC
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	movs r5, 0x9C
-	lsls r5, 2
-	adds r1, r5, 0
-	bl CalcByteArraySum
-	adds r4, r5
-	ldr r1, [r4]
-	cmp r0, r1
-	bne _081D3916
-	movs r0, 0x1
-	b _081D3918
-_081D3916:
-	movs r0, 0
-_081D3918:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D38FC
-
-	thumb_func_start sub_81D3920
-sub_81D3920: @ 81D3920
-	push {r4-r7,lr}
-	adds r7, r0, 0
-	ldrb r6, [r7]
-	subs r0, r6, 0x1
-	cmp r0, 0x7
-	bhi _081D3964
-	movs r5, 0
-	cmp r5, r6
-	bcs _081D394C
-	adds r4, r7, 0
-	adds r4, 0x8
-_081D3936:
-	adds r0, r4, 0
-	bl sub_81D38FC
-	cmp r0, 0
-	beq _081D3964
-	movs r0, 0x9D
-	lsls r0, 2
-	adds r4, r0
-	adds r5, 0x1
-	cmp r5, r6
-	bcc _081D3936
-_081D394C:
-	adds r0, r7, 0
-	adds r0, 0x8
-	movs r1, 0x9D
-	lsls r1, 2
-	muls r1, r6
-	bl CalcByteArraySum
-	ldr r1, [r7, 0x4]
-	cmp r0, r1
-	bne _081D3964
-	movs r0, 0x1
-	b _081D3966
-_081D3964:
-	movs r0, 0
-_081D3966:
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3920
-
-	thumb_func_start sub_81D396C
-sub_81D396C: @ 81D396C
-	push {r4,lr}
-	adds r4, r0, 0
-	ldrb r0, [r4]
-	subs r0, 0x1
-	cmp r0, 0x7
-	bhi _081D398E
-	adds r0, r4, 0
-	adds r0, 0x8
-	movs r1, 0xEE
-	lsls r1, 4
-	bl CalcByteArraySum
-	ldr r1, [r4, 0x4]
-	cmp r0, r1
-	bne _081D398E
-	movs r0, 0x1
-	b _081D3990
-_081D398E:
-	movs r0, 0
-_081D3990:
-	pop {r4}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D396C
-
-	thumb_func_start sub_81D3998
-sub_81D3998: @ 81D3998
-	push {r4-r7,lr}
-	mov r7, r8
-	push {r7}
-	adds r7, r0, 0
-	mov r8, r1
-	movs r2, 0x80
-	lsls r2, 5
-	mov r0, r8
-	movs r1, 0
-	bl memset
-	ldrb r0, [r7]
-	mov r1, r8
-	strb r0, [r1]
-	bl sub_81D38D4
-	mov r2, r8
-	strb r0, [r2, 0x1]
-	ldrb r0, [r7]
-	adds r0, 0x1
-	asrs r0, 1
-	strb r0, [r2, 0x2]
-	movs r6, 0
-	b _081D3A42
-_081D39C8:
-	movs r0, 0x1
-	ands r0, r6
-	cmp r0, 0
-	bne _081D3A14
-	lsrs r0, r6, 31
-	adds r0, r6, r0
-	asrs r0, 1
-	lsls r4, r0, 4
-	subs r4, r0
-	lsls r4, 3
-	subs r4, r0
-	lsls r4, 3
-	add r4, r8
-	movs r0, 0x9D
-	lsls r0, 2
-	adds r5, r6, 0
-	muls r5, r0
-	adds r5, r7, r5
-	ldrb r0, [r5, 0x8]
-	strb r0, [r4, 0x8]
-	movs r1, 0xA7
-	lsls r1, 2
-	adds r0, r4, r1
-	movs r2, 0xAA
-	lsls r2, 1
-	adds r1, r5, r2
-	subs r2, 0x30
-	bl memcpy
-	adds r4, 0xC
-	adds r5, 0xC
-	adds r0, r4, 0
-	adds r1, r5, 0
-	movs r2, 0xA4
-	lsls r2, 1
-	bl memcpy
-	b _081D3A40
-_081D3A14:
-	lsrs r1, r6, 31
-	adds r1, r6, r1
-	asrs r1, 1
-	lsls r0, r1, 4
-	subs r0, r1
-	lsls r0, 3
-	subs r0, r1
-	lsls r0, 3
-	add r0, r8
-	movs r1, 0x9D
-	lsls r1, 2
-	muls r1, r6
-	adds r1, r7, r1
-	ldrb r2, [r1, 0x8]
-	strb r2, [r0, 0x9]
-	movs r2, 0xAA
-	lsls r2, 1
-	adds r0, r2
-	adds r1, 0xC
-	subs r2, 0xC
-	bl memcpy
-_081D3A40:
-	adds r6, 0x1
-_081D3A42:
-	ldrb r0, [r7]
-	cmp r6, r0
-	blt _081D39C8
-	movs r0, 0x1
-	ands r0, r6
-	cmp r0, 0
-	beq _081D3A7E
-	lsrs r2, r6, 31
-	adds r2, r6, r2
-	asrs r2, 1
-	lsls r0, r2, 4
-	subs r0, r2
-	lsls r0, 3
-	subs r0, r2
-	lsls r0, 3
-	add r0, r8
-	movs r1, 0xAA
-	lsls r1, 1
-	adds r0, r1
-	ldr r3, =gUnknown_08625B6C
-	lsls r1, r2, 2
-	adds r1, r2
-	lsls r1, 3
-	adds r1, r2
-	lsls r1, 3
-	adds r1, r3
-	movs r2, 0xA4
-	lsls r2, 1
-	bl memcpy
-_081D3A7E:
-	mov r0, r8
-	adds r0, 0x8
-	movs r1, 0xEE
-	lsls r1, 4
-	bl CalcByteArraySum
-	mov r2, r8
-	str r0, [r2, 0x4]
-	movs r0, 0x1E
-	mov r1, r8
-	bl sub_8153634
-	cmp r0, 0x1
-	bne _081D3AA4
-	movs r0, 0x1
-	b _081D3AA6
-	.pool
-_081D3AA4:
-	movs r0, 0
-_081D3AA6:
-	pop {r3}
-	mov r8, r3
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3998
-
-	thumb_func_start sub_81D3AB0
-sub_81D3AB0: @ 81D3AB0
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	movs r0, 0x80
-	lsls r0, 5
-	bl AllocZeroed
-	adds r5, r0, 0
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_81D3998
-	adds r4, r0, 0
-	adds r0, r5, 0
-	bl Free
-	adds r0, r4, 0
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3AB0
-
-	thumb_func_start sub_81D3AD8
-sub_81D3AD8: @ 81D3AD8
-	push {r4,r5,lr}
-	adds r5, r0, 0
-	adds r4, r1, 0
-	movs r0, 0x1E
-	bl TryCopySpecialSaveSection
-	cmp r0, 0x1
-	bne _081D3B04
-	ldr r2, =0x00000ee8
-	adds r0, r5, 0
-	adds r1, r4, 0
-	bl memcpy
-	adds r0, r5, 0
-	bl sub_81D396C
-	cmp r0, 0
-	beq _081D3B04
-	movs r0, 0x1
-	b _081D3B06
-	.pool
-_081D3B04:
-	movs r0, 0
-_081D3B06:
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3AD8
-
-	thumb_func_start sub_81D3B0C
-sub_81D3B0C: @ 81D3B0C
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	movs r0, 0x80
-	lsls r0, 5
-	bl AllocZeroed
-	adds r5, r0, 0
-	adds r0, r4, 0
-	adds r1, r5, 0
-	bl sub_81D3AD8
-	adds r4, r0, 0
-	adds r0, r5, 0
-	bl Free
-	adds r0, r4, 0
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3B0C
-
-	thumb_func_start sub_81D3B34
-sub_81D3B34: @ 81D3B34
-	push {r4,r5,lr}
-	movs r0, 0x80
-	lsls r0, 5
-	bl AllocZeroed
-	adds r4, r0, 0
-	bl sub_81D3B0C
-	adds r5, r0, 0
-	adds r0, r4, 0
-	bl Free
-	adds r0, r5, 0
-	pop {r4,r5}
-	pop {r1}
-	bx r1
-	thumb_func_end sub_81D3B34
-
-	thumb_func_start sub_81D3B54
-sub_81D3B54: @ 81D3B54
-	push {r4-r7,lr}
-	sub sp, 0x4
-	adds r6, r0, 0
-	adds r5, r1, 0
-	bl sub_81D41A0
-	movs r7, 0x2
-	ldr r4, =gShouldAdvanceLinkState
-_081D3B64:
-	bl sub_81D4170
-	ldr r0, =gUnknown_030012E2
-	ldrh r1, [r0]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _081D3B76
-	strb r7, [r4]
-_081D3B76:
-	movs r0, 0x1
-	adds r1, r6, 0
-	adds r2, r5, 0
-	movs r3, 0
-	bl sub_81D3D70
-	adds r1, r0, 0
-	ldr r0, =gUnknown_030012E4
-	strh r1, [r0]
-	movs r0, 0x13
-	ands r0, r1
-	cmp r0, 0x10
-	bne _081D3BA0
-	movs r4, 0
-	b _081D3BC2
-	.pool
-_081D3BA0:
-	movs r0, 0x8
-	ands r0, r1
-	cmp r0, 0
-	beq _081D3BAC
-	movs r4, 0x1
-	b _081D3BC2
-_081D3BAC:
-	movs r0, 0x4
-	ands r0, r1
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	bne _081D3BC0
-	strb r0, [r4]
-	bl VBlankIntrWait
-	b _081D3B64
-_081D3BC0:
-	movs r4, 0x2
-_081D3BC2:
-	movs r0, 0
-	str r0, [sp]
-	ldr r1, =gUnknown_030012C8
-	ldr r2, =0x05000006
-	mov r0, sp
-	bl CpuSet
-	bl sub_81D41F4
-	adds r0, r4, 0
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D3B54
-
-	thumb_func_start sub_81D3BE8
-sub_81D3BE8: @ 81D3BE8
-	push {r4-r6,lr}
-	sub sp, 0x4
-	adds r5, r0, 0
-	bl sub_81D41A0
-	movs r6, 0x2
-	ldr r4, =gShouldAdvanceLinkState
-_081D3BF6:
-	bl sub_81D4170
-	ldr r0, =gUnknown_030012E2
-	ldrh r1, [r0]
-	movs r0, 0x2
-	ands r0, r1
-	cmp r0, 0
-	beq _081D3C08
-	strb r6, [r4]
-_081D3C08:
-	movs r0, 0
-	movs r1, 0
-	movs r2, 0
-	adds r3, r5, 0
-	bl sub_81D3D70
-	adds r1, r0, 0
-	ldr r0, =gUnknown_030012E4
-	strh r1, [r0]
-	movs r0, 0x13
-	ands r0, r1
-	cmp r0, 0x10
-	bne _081D3C34
-	movs r4, 0
-	b _081D3C56
-	.pool
-_081D3C34:
-	movs r0, 0x8
-	ands r0, r1
-	cmp r0, 0
-	beq _081D3C40
-	movs r4, 0x1
-	b _081D3C56
-_081D3C40:
-	movs r0, 0x4
-	ands r0, r1
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0
-	bne _081D3C54
-	strb r0, [r4]
-	bl VBlankIntrWait
-	b _081D3BF6
-_081D3C54:
-	movs r4, 0x2
-_081D3C56:
-	movs r0, 0
-	str r0, [sp]
-	ldr r1, =gUnknown_030012C8
-	ldr r2, =0x05000006
-	mov r0, sp
-	bl CpuSet
-	bl sub_81D41F4
-	adds r0, r4, 0
-	add sp, 0x4
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D3BE8
-
-	thumb_func_start sub_81D3C7C
-sub_81D3C7C: @ 81D3C7C
-	push {r4,lr}
-	ldr r4, =0x04000208
-	movs r3, 0
-	strh r3, [r4]
-	ldr r2, =0x04000200
-	ldrh r1, [r2]
-	ldr r0, =0x0000ff3f
-	ands r0, r1
-	strh r0, [r2]
-	movs r0, 0x1
-	strh r0, [r4]
-	ldr r0, =0x04000128
-	strh r3, [r0]
-	subs r0, 0x1A
-	strh r3, [r0]
-	ldr r1, =0x04000202
-	movs r0, 0xC0
-	strh r0, [r1]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D3C7C
-
-	thumb_func_start sub_81D3CBC
-sub_81D3CBC: @ 81D3CBC
-	push {r4-r7,lr}
-	sub sp, 0x4
-	ldr r5, =0x04000208
-	movs r4, 0
-	strh r4, [r5]
-	ldr r3, =0x04000200
-	ldrh r1, [r3]
-	ldr r0, =0x0000ff3f
-	ands r0, r1
-	strh r0, [r3]
-	movs r6, 0x1
-	strh r6, [r5]
-	ldr r0, =0x04000134
-	strh r4, [r0]
-	ldr r2, =0x04000128
-	movs r1, 0x80
-	lsls r1, 6
-	adds r0, r1, 0
-	strh r0, [r2]
-	ldrh r0, [r2]
-	ldr r7, =0x00004003
-	adds r1, r7, 0
-	orrs r0, r1
-	strh r0, [r2]
-	strh r4, [r5]
-	ldrh r0, [r3]
-	movs r1, 0x80
-	orrs r0, r1
-	strh r0, [r3]
-	strh r6, [r5]
-	ldr r1, =gUnknown_030012C8
-	ldrb r0, [r1, 0x1]
-	cmp r0, 0
-	bne _081D3D0A
-	str r0, [sp]
-	ldr r2, =0x05000006
-	mov r0, sp
-	bl CpuSet
-_081D3D0A:
-	add sp, 0x4
-	pop {r4-r7}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D3CBC
-
-	thumb_func_start sub_81D3D34
-sub_81D3D34: @ 81D3D34
-	ldr r0, =0x04000134
-	movs r3, 0
-	strh r3, [r0]
-	ldr r2, =0x04000128
-	movs r1, 0xA0
-	lsls r1, 7
-	adds r0, r1, 0
-	strh r0, [r2]
-	ldrh r0, [r2]
-	movs r1, 0x8
-	orrs r0, r1
-	strh r0, [r2]
-	ldr r0, =gShouldAdvanceLinkState
-	strb r3, [r0]
-	ldr r0, =gUnknown_030012E6
-	strh r3, [r0]
-	ldr r1, =gUnknown_030012E8
-	movs r0, 0
-	str r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end sub_81D3D34
-
-	thumb_func_start sub_81D3D70
-sub_81D3D70: @ 81D3D70
-	push {r4-r6,lr}
-	adds r4, r1, 0
-	adds r5, r2, 0
-	adds r6, r3, 0
-	lsls r0, 24
-	lsrs r2, r0, 24
-	ldr r0, =gUnknown_030012C8
-	ldrb r0, [r0, 0x1]
-	cmp r0, 0x6
-	bls _081D3D86
-	b _081D3ECC
-_081D3D86:
-	lsls r0, 2
-	ldr r1, =_081D3D98
-	adds r0, r1
-	ldr r0, [r0]
-	mov pc, r0
-	.pool
-	.align 2, 0
-_081D3D98:
-	.4byte _081D3DB4
-	.4byte _081D3DC8
-	.4byte _081D3DE8
-	.4byte _081D3DFC
-	.4byte _081D3E74
-	.4byte _081D3E84
-	.4byte _081D3EBC
-_081D3DB4:
-	bl sub_81D3CBC
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0x1
-	strb r0, [r1, 0x2]
-	strb r0, [r1, 0x1]
-	b _081D3ECC
-	.pool
-_081D3DC8:
-	adds r0, r2, 0
-	bl sub_81D3EE8
-	lsls r0, 16
-	cmp r0, 0
-	beq _081D3DD8
-	bl sub_81D413C
-_081D3DD8:
-	ldr r0, =gShouldAdvanceLinkState
-	ldrb r0, [r0]
-	cmp r0, 0x2
-	beq _081D3DE2
-	b _081D3ECC
-_081D3DE2:
-	b _081D3E04
-	.pool
-_081D3DE8:
-	bl sub_81D3D34
-	adds r0, r4, 0
-	adds r1, r5, 0
-	adds r2, r6, 0
-	bl sub_81D3F1C
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0x3
-	strb r0, [r1, 0x1]
-_081D3DFC:
-	ldr r0, =gShouldAdvanceLinkState
-	ldrb r0, [r0]
-	cmp r0, 0x2
-	bne _081D3E18
-_081D3E04:
-	ldr r1, =gUnknown_030012C8
-	strb r0, [r1, 0x4]
-	movs r0, 0x6
-	strb r0, [r1, 0x1]
-	b _081D3ECC
-	.pool
-_081D3E18:
-	ldr r2, =gUnknown_030012E6
-	ldrh r0, [r2]
-	adds r0, 0x1
-	strh r0, [r2]
-	ldr r1, =gUnknown_030012E8
-	ldr r0, [r1]
-	adds r3, r0, 0x1
-	str r3, [r1]
-	ldr r1, =gUnknown_030012C8
-	ldrb r0, [r1]
-	cmp r0, 0
-	bne _081D3E3C
-	cmp r3, 0x3C
-	bls _081D3E3C
-	movs r0, 0x1
-	strb r0, [r1, 0x4]
-	movs r0, 0x6
-	strb r0, [r1, 0x1]
-_081D3E3C:
-	ldr r4, =gUnknown_030012C8
-	ldrb r0, [r4, 0x2]
-	cmp r0, 0x2
-	beq _081D3ECC
-	ldrb r0, [r4]
-	cmp r0, 0
-	beq _081D3E64
-	ldrh r0, [r2]
-	cmp r0, 0x2
-	bls _081D3E64
-	bl sub_81D413C
-	movs r0, 0x2
-	b _081D3ECA
-	.pool
-_081D3E64:
-	bl sub_81D413C
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0x2
-	strb r0, [r1, 0x2]
-	b _081D3ECC
-	.pool
-_081D3E74:
-	bl sub_81D3CBC
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0x5
-	strb r0, [r1, 0x1]
-	b _081D3ECC
-	.pool
-_081D3E84:
-	ldr r0, =gUnknown_030012C8
-	ldrb r0, [r0]
-	cmp r0, 0x1
-	bne _081D3E98
-	ldr r0, =gUnknown_030012E6
-	ldrh r0, [r0]
-	cmp r0, 0x2
-	bls _081D3E98
-	bl sub_81D413C
-_081D3E98:
-	ldr r1, =gUnknown_030012E6
-	ldrh r0, [r1]
-	adds r0, 0x1
-	strh r0, [r1]
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x3C
-	bls _081D3ECC
-	ldr r0, =gUnknown_030012C8
-	movs r1, 0x1
-	strb r1, [r0, 0x4]
-	movs r1, 0x6
-	strb r1, [r0, 0x1]
-	b _081D3ECC
-	.pool
-_081D3EBC:
-	ldr r4, =gUnknown_030012C8
-	ldrb r0, [r4, 0x2]
-	cmp r0, 0
-	beq _081D3ECC
-	bl sub_81D3C7C
-	movs r0, 0
-_081D3ECA:
-	strb r0, [r4, 0x2]
-_081D3ECC:
-	ldr r2, =gUnknown_030012C8
-	ldrb r0, [r2, 0x2]
-	ldrb r1, [r2, 0x4]
-	lsls r1, 2
-	orrs r0, r1
-	ldrb r1, [r2, 0x3]
-	lsls r1, 4
-	orrs r0, r1
-	pop {r4-r6}
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D3D70
-
-	thumb_func_start sub_81D3EE8
-sub_81D3EE8: @ 81D3EE8
-	push {lr}
-	lsls r0, 24
-	lsrs r2, r0, 24
-	ldr r0, =0x04000128
-	ldr r0, [r0]
-	movs r1, 0xC
-	ands r0, r1
-	cmp r0, 0x8
-	bne _081D3F0C
-	cmp r2, 0
-	beq _081D3F0C
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0x1
-	b _081D3F10
-	.pool
-_081D3F0C:
-	ldr r1, =gUnknown_030012C8
-	movs r0, 0
-_081D3F10:
-	strb r0, [r1]
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D3EE8
-
-	thumb_func_start sub_81D3F1C
-sub_81D3F1C: @ 81D3F1C
-	push {r4,r5,lr}
-	adds r4, r0, 0
-	adds r5, r1, 0
-	ldr r3, =gUnknown_030012C8
-	ldrb r0, [r3]
-	cmp r0, 0
-	beq _081D3F54
-	ldr r2, =0x04000128
-	ldrh r0, [r2]
-	movs r1, 0x1
-	orrs r0, r1
-	strh r0, [r2]
-	str r5, [r3, 0x8]
-	ldr r0, =0x04000120
-	str r4, [r0]
-	lsrs r0, r4, 2
-	adds r0, 0x1
-	str r0, [r3, 0x10]
-	bl sub_81D3F68
-	b _081D3F5C
-	.pool
-_081D3F54:
-	ldr r1, =0x04000128
-	ldrh r0, [r1]
-	strh r0, [r1]
-	str r2, [r3, 0x8]
-_081D3F5C:
-	pop {r4,r5}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D3F1C
-
-	thumb_func_start sub_81D3F68
-sub_81D3F68: @ 81D3F68
-	ldr r1, =0x0400010c
-	ldr r2, =0x0000fda7
-	adds r0, r2, 0
-	strh r0, [r1]
-	ldr r0, =0x0400010e
-	movs r2, 0x40
-	strh r2, [r0]
-	ldr r3, =0x04000208
-	movs r0, 0
-	strh r0, [r3]
-	adds r1, 0xF4
-	ldrh r0, [r1]
-	orrs r0, r2
-	strh r0, [r1]
-	movs r0, 0x1
-	strh r0, [r3]
-	bx lr
-	.pool
-	thumb_func_end sub_81D3F68
-
-	thumb_func_start sub_81D3F9C
-sub_81D3F9C: @ 81D3F9C
-	push {lr}
-	bl sub_81D414C
-	bl sub_81D413C
-	pop {r0}
-	bx r0
-	thumb_func_end sub_81D3F9C
-
-	thumb_func_start sub_81D3FAC
-sub_81D3FAC: @ 81D3FAC
-	push {r4-r6,lr}
-	sub sp, 0x8
-	ldr r2, =gUnknown_030012C8
-	ldrb r0, [r2, 0x1]
-	adds r3, r2, 0
-	cmp r0, 0x3
-	beq _081D4034
-	cmp r0, 0x3
-	bgt _081D3FC8
-	cmp r0, 0x1
-	beq _081D3FD0
-	b _081D412A
-	.pool
-_081D3FC8:
-	cmp r0, 0x5
-	bne _081D3FCE
-	b _081D40FC
-_081D3FCE:
-	b _081D412A
-_081D3FD0:
-	ldr r1, =0x0400012a
-	ldr r2, =0x0000ccd0
-	adds r0, r2, 0
-	strh r0, [r1]
-	ldr r0, =0x04000120
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	str r0, [sp]
-	str r1, [sp, 0x4]
-	movs r1, 0
-	movs r2, 0
-	movs r4, 0
-	ldr r6, =0x0000ccd0
-	ldr r5, =0x0000ffff
-_081D3FEC:
-	lsls r0, r1, 1
-	add r0, sp
-	ldrh r0, [r0]
-	cmp r0, r6
-	bne _081D4010
-	adds r0, r2, 0x1
-	lsls r0, 16
-	lsrs r2, r0, 16
-	b _081D401A
-	.pool
-_081D4010:
-	cmp r0, r5
-	beq _081D401A
-	adds r0, r4, 0x1
-	lsls r0, 16
-	lsrs r4, r0, 16
-_081D401A:
-	adds r0, r1, 0x1
-	lsls r0, 16
-	lsrs r1, r0, 16
-	cmp r1, 0x3
-	bls _081D3FEC
-	cmp r2, 0x2
-	beq _081D402A
-	b _081D412A
-_081D402A:
-	cmp r4, 0
-	beq _081D4030
-	b _081D412A
-_081D4030:
-	strb r2, [r3, 0x1]
-	b _081D412A
-_081D4034:
-	ldr r0, =0x04000120
-	ldr r4, [r0]
-	ldr r0, [r2, 0xC]
-	cmp r0, 0
-	bne _081D404A
-	ldrb r0, [r2]
-	cmp r0, 0
-	bne _081D404A
-	lsrs r0, r4, 2
-	adds r0, 0x1
-	str r0, [r2, 0x10]
-_081D404A:
-	ldrb r0, [r3]
-	cmp r0, 0x1
-	bne _081D4080
-	ldr r1, [r3, 0xC]
-	ldr r0, [r3, 0x10]
-	cmp r1, r0
-	bge _081D4074
-	ldr r2, =0x04000120
-	ldr r0, [r3, 0x8]
-	lsls r1, 2
-	adds r1, r0
-	ldr r0, [r1]
-	str r0, [r2]
-	ldr r0, [r3, 0x14]
-	ldr r1, [r1]
-	adds r0, r1
-	str r0, [r3, 0x14]
-	b _081D40BA
-	.pool
-_081D4074:
-	ldr r1, =0x04000120
-	ldr r0, [r3, 0x14]
-	b _081D40B8
-	.pool
-_081D4080:
-	ldr r1, [r3, 0xC]
-	cmp r1, 0
-	ble _081D40A0
-	ldr r0, [r3, 0x10]
-	adds r0, 0x1
-	cmp r1, r0
-	bge _081D40A0
-	ldr r0, [r3, 0x8]
-	lsls r1, 2
-	adds r1, r0
-	subs r1, 0x4
-	str r4, [r1]
-	ldr r0, [r3, 0x14]
-	adds r0, r4
-	str r0, [r3, 0x14]
-	b _081D40B4
-_081D40A0:
-	ldr r0, [r3, 0xC]
-	cmp r0, 0
-	beq _081D40B4
-	ldr r0, [r3, 0x14]
-	cmp r0, r4
-	bne _081D40B0
-	movs r0, 0x1
-	b _081D40B2
-_081D40B0:
-	movs r0, 0x2
-_081D40B2:
-	strb r0, [r3, 0x3]
-_081D40B4:
-	ldr r1, =gUnknown_030012E8
-	movs r0, 0
-_081D40B8:
-	str r0, [r1]
-_081D40BA:
-	ldr r1, [r3, 0xC]
-	adds r1, 0x1
-	str r1, [r3, 0xC]
-	ldr r0, [r3, 0x10]
-	adds r0, 0x2
-	cmp r1, r0
-	bge _081D40EA
-	ldrb r0, [r3]
-	cmp r0, 0
-	beq _081D40E4
-	ldr r0, =0x0400010e
-	ldrh r1, [r0]
-	movs r2, 0x80
-	orrs r1, r2
-	strh r1, [r0]
-	b _081D412A
-	.pool
-_081D40E4:
-	bl sub_81D413C
-	b _081D412A
-_081D40EA:
-	movs r0, 0
-	movs r1, 0x4
-	strb r1, [r3, 0x1]
-	ldr r1, =gUnknown_030012E6
-	strh r0, [r1]
-	b _081D412A
-	.pool
-_081D40FC:
-	ldrb r3, [r2]
-	cmp r3, 0
-	bne _081D4108
-	ldr r1, =0x0400012a
-	ldrb r0, [r2, 0x3]
-	strh r0, [r1]
-_081D4108:
-	ldr r0, =0x04000120
-	ldr r1, [r0, 0x4]
-	ldr r0, [r0]
-	str r0, [sp]
-	str r1, [sp, 0x4]
-	mov r0, sp
-	ldrh r1, [r0, 0x2]
-	subs r0, r1, 0x1
-	lsls r0, 16
-	lsrs r0, 16
-	cmp r0, 0x1
-	bhi _081D412A
-	cmp r3, 0x1
-	bne _081D4126
-	strb r1, [r2, 0x3]
-_081D4126:
-	movs r0, 0x6
-	strb r0, [r2, 0x1]
-_081D412A:
-	add sp, 0x8
-	pop {r4-r6}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D3FAC
-
-	thumb_func_start sub_81D413C
-sub_81D413C: @ 81D413C
-	ldr r0, =0x04000128
-	ldrh r1, [r0]
-	movs r2, 0x80
-	orrs r1, r2
-	strh r1, [r0]
-	bx lr
-	.pool
-	thumb_func_end sub_81D413C
-
-	thumb_func_start sub_81D414C
-sub_81D414C: @ 81D414C
-	ldr r2, =0x0400010e
-	ldrh r1, [r2]
-	ldr r0, =0x0000ff7f
-	ands r0, r1
-	strh r0, [r2]
-	ldr r1, =0x0400010c
-	ldr r2, =0x0000fda7
-	adds r0, r2, 0
-	strh r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end sub_81D414C
-
-	thumb_func_start sub_81D4170
-sub_81D4170: @ 81D4170
-	push {r4,lr}
-	ldr r0, =0x04000130
-	ldrh r0, [r0]
-	ldr r2, =0x000003ff
-	adds r1, r2, 0
-	eors r1, r0
-	ldr r4, =gUnknown_030012E2
-	ldr r3, =gUnknown_030012E0
-	ldrh r2, [r3]
-	adds r0, r1, 0
-	bics r0, r2
-	strh r0, [r4]
-	strh r1, [r3]
-	pop {r4}
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D4170
-
-	thumb_func_start sub_81D41A0
-sub_81D41A0: @ 81D41A0
-	ldr r1, =gUnknown_030012EC
-	ldr r0, =0x04000208
-	ldrh r0, [r0]
-	strh r0, [r1]
-	ldr r1, =gUnknown_030012EE
-	ldr r0, =0x04000200
-	ldrh r0, [r0]
-	strh r0, [r1]
-	ldr r1, =gUnknown_030012F0
-	ldr r0, =0x0400010e
-	ldrh r0, [r0]
-	strh r0, [r1]
-	ldr r1, =gUnknown_030012F2
-	ldr r0, =0x04000128
-	ldrh r0, [r0]
-	strh r0, [r1]
-	ldr r1, =gUnknown_030012F4
-	ldr r0, =0x04000134
-	ldrh r0, [r0]
-	strh r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end sub_81D41A0
-
-	thumb_func_start sub_81D41F4
-sub_81D41F4: @ 81D41F4
-	ldr r1, =0x04000208
-	ldr r0, =gUnknown_030012EC
-	ldrh r0, [r0]
-	strh r0, [r1]
-	subs r1, 0x8
-	ldr r0, =gUnknown_030012EE
-	ldrh r0, [r0]
-	strh r0, [r1]
-	subs r1, 0xF2
-	ldr r0, =gUnknown_030012F0
-	ldrh r0, [r0]
-	strh r0, [r1]
-	adds r1, 0x1A
-	ldr r0, =gUnknown_030012F2
-	ldrh r0, [r0]
-	strh r0, [r1]
-	adds r1, 0xC
-	ldr r0, =gUnknown_030012F4
-	ldrh r0, [r0]
-	strh r0, [r1]
-	bx lr
-	.pool
-	thumb_func_end sub_81D41F4
-
-	thumb_func_start sub_81D4238
-sub_81D4238: @ 81D4238
-	push {lr}
-	sub sp, 0x4
-	movs r0, 0
-	str r0, [sp]
-	ldr r1, =gUnknown_030012C8
-	ldr r2, =0x05000006
-	mov r0, sp
-	bl CpuSet
-	add sp, 0x4
-	pop {r0}
-	bx r0
-	.pool
-	thumb_func_end sub_81D4238
-
-	thumb_func_start sub_81D4258
-sub_81D4258: @ 81D4258
-	push {lr}
-	sub sp, 0x4
-	ldr r0, =gSaveBlock1Ptr
-	ldr r0, [r0]
-	ldrb r1, [r0, 0x5]
-	ldrb r2, [r0, 0x4]
-	movs r0, 0x1
-	mov r3, sp
-	bl TryGetEventObjectIdByLocalIdAndMap
-	mov r0, sp
-	ldrb r0, [r0]
-	add sp, 0x4
-	pop {r1}
-	bx r1
-	.pool
-	thumb_func_end sub_81D4258
-
 	thumb_func_start sub_81D427C
 sub_81D427C: @ 81D427C
 	push {r4-r7,lr}
diff --git a/data/rom_81D1C44.s b/data/ereader.s
index 5fbab5c3a..5fbab5c3a 100644
--- a/data/rom_81D1C44.s
+++ b/data/ereader.s
diff --git a/include/ereader.h b/include/ereader.h
new file mode 100755
index 000000000..da31c8212
--- /dev/null
+++ b/include/ereader.h
@@ -0,0 +1,9 @@
+#ifndef GUARD_EREADER_H
+#define GUARD_EREADER_H
+
+bool32 sub_81D3B34(void);
+u32 sub_81D427C(void);
+bool8 sub_81D4A58(struct EventObject*);
+bool8 EventObjectIsFarawayIslandMew(struct EventObject *);
+
+#endif // GUARD_EREADER_H
diff --git a/include/pokenav.h b/include/pokenav.h
index 55bfb366c..4e02461fe 100644
--- a/include/pokenav.h
+++ b/include/pokenav.h
@@ -3,9 +3,6 @@
 #include "list_menu.h"
 
 bool8 sub_81D312C(void *arg0);
-bool8 sub_81D4A58(struct EventObject*);
-bool8 EventObjectIsFarawayIslandMew(struct EventObject *);
-u32 sub_81D427C(void);
 void sub_81D4998(void);
 void CB2_InitPokeNav(void);
 
diff --git a/ld_script.txt b/ld_script.txt
index bd0bb7661..5a1442fa8 100644
--- a/ld_script.txt
+++ b/ld_script.txt
@@ -291,7 +291,8 @@ SECTIONS {
         src/pokenav_match_call.o(.text);
         src/menu_specialized.o(.text);
         asm/menu_specialized.o(.text);
-        asm/rom_81D1C44.o(.text);
+        src/ereader.o(.text);
+        asm/ereader.o(.text);
         src/trainer_hill.o(.text);
         src/rayquaza_scene.o(.text);
         src/walda_phrase.o(.text);
@@ -596,7 +597,7 @@ SECTIONS {
         src/pokenav_match_call.o(.rodata);
         src/menu_specialized.o(.rodata);
         data/menu_specialized.o(.rodata);
-        data/rom_81D1C44.o(.rodata);
+        data/ereader.o(.rodata);
         src/trainer_hill.o(.rodata);
         src/rayquaza_scene.o(.rodata);
         src/walda_phrase.o(.rodata);
diff --git a/src/ereader.c b/src/ereader.c
new file mode 100755
index 000000000..053f82381
--- /dev/null
+++ b/src/ereader.c
@@ -0,0 +1,564 @@
+#include "global.h"
+#include "alloc.h"
+#include "event_object_movement.h"
+#include "link.h"
+#include "save.h"
+#include "util.h"
+
+struct Unk81D38FC
+{
+    u8 unk0[0x270];
+    int checksum;
+};
+
+struct Unknown030012C8
+{
+    u8 unk0[8];
+    u32 *unk8;
+    int unkC;
+    int unk10;
+    int unk14;
+};
+
+void sub_81D41A0(void);
+static void sub_81D4170(void);
+int sub_81D3D70(u8, u32, u32*, u32*);
+void sub_81D41F4(void);
+static u16 sub_81D3EE8(u8);
+static void sub_81D413C(void);
+static void sub_81D414C(void);
+static void sub_81D3F1C(u32, u32*, u32*);
+static void sub_81D3F68(void);
+
+extern struct Unknown030012C8 gUnknown_030012C8;
+extern u16 gUnknown_030012E0;
+extern u16 gUnknown_030012E2;
+extern u16 gUnknown_030012E4;
+extern u16 gUnknown_030012E6;
+extern u32 gUnknown_030012E8;
+extern u16 gUnknown_030012EC;
+extern u16 gUnknown_030012EE;
+extern u16 gUnknown_030012F0;
+extern u16 gUnknown_030012F2;
+extern u16 gUnknown_030012F4;
+
+extern const u8 gUnknown_08625B6C[];
+
+static u8 sub_81D38D4(void)
+{
+    return (gSaveBlock1Ptr->trainerHill.unused + 1) % 256;
+}
+
+static bool32 sub_81D38FC(struct Unk81D38FC *arg0)
+{
+    int checksum = CalcByteArraySum(arg0->unk0, 0x270);
+    if (checksum != arg0->checksum)
+        return FALSE;
+
+    return TRUE;
+}
+
+bool8 sub_81D3920(u8 *buffer)
+{
+    u32 i;
+    u32 checksum;
+    int var0 = buffer[0];
+    if (var0 < 1 || var0 > 8)
+        return FALSE;
+
+    for (i = 0; i < var0; i++)
+    {
+        struct Unk81D38FC *var1 = (struct Unk81D38FC *)(&buffer[i * (sizeof(struct Unk81D38FC)) + 8]);
+        if (!sub_81D38FC(var1))
+            return FALSE;
+    }
+
+    checksum = CalcByteArraySum(buffer + 8, var0 * 0x274);
+    if (checksum != ((int *)buffer)[1])
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D396C(u8 *buffer)
+{
+    u32 checksum;
+    int var0 = buffer[0];
+    if (var0 < 1 || var0 > 8)
+        return FALSE;
+
+    checksum = CalcByteArraySum(buffer + 8, 0xEE0);
+    if (checksum != ((int *)buffer)[1])
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D3998(struct Unk81D38FC *arg0, u8 *buffer2)
+{
+    int i;
+    const u8 *ereaderVals;
+
+    memset(buffer2, 0, 0x1000);
+    buffer2[0] = arg0->unk0[0];
+    buffer2[1] = sub_81D38D4();
+    buffer2[2] = (arg0->unk0[0] + 1) / 2;
+
+    for (i = 0; i < arg0->unk0[0]; i++)
+    {
+        if (!(i & 1))
+        {
+            u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+            u8 *var1 = arg0[i].unk0;
+            var0[8] = var1[8];
+            memcpy(&var0[0x29C], &var1[0x154], 0x124);
+            var0 += 0xC;
+            var1 += 0xC;
+            memcpy(var0, var1, 0x148);
+        }
+        else
+        {
+            u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+            u8 *var1 = arg0[i].unk0;
+            var0[9] = var1[8];
+            memcpy(&var0[0x154], &var1[0xC], 0x148);
+        }
+    }
+
+    if (i & 1)
+    {
+        u8 *var0 = &buffer2[(i / 2) * 0x3B8];
+        var0 += 0x154;
+
+        ereaderVals = gUnknown_08625B6C;
+        memcpy(var0, &ereaderVals[(i / 2) * 0x148], 0x148);
+    }
+
+    ((int *)buffer2)[1] = CalcByteArraySum(buffer2 + 8, 0xEE0);
+    if (sub_8153634(SECTOR_ID_TRAINER_HILL, buffer2) != 1)
+        return FALSE;
+
+    return TRUE;
+}
+
+bool32 sub_81D3AB0(struct Unk81D38FC *arg0)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3998(arg0, var0);
+    Free(var0);
+    return result;
+}
+
+static bool32 sub_81D3AD8(u8 *arg0, u8 *arg1)
+{
+    if (TryCopySpecialSaveSection(SECTOR_ID_TRAINER_HILL, arg1) != 1)
+        return FALSE;
+
+    memcpy(arg0, arg1, 0xEE8);
+    if (!sub_81D396C(arg0))
+        return FALSE;
+
+    return TRUE;
+}
+
+static bool32 sub_81D3B0C(u8 *arg0)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3AD8(arg0, var0);
+    Free(var0);
+    return result;
+}
+
+bool32 sub_81D3B34(void)
+{
+    u8 *var0 = AllocZeroed(0x1000);
+    bool32 result = sub_81D3B0C(var0);
+    Free(var0);
+    return result;
+}
+
+static int unref_sub_81D3B54(int arg0, u32 *arg1)
+{
+    int result;
+    u16 var0;
+    int var1;
+
+    sub_81D41A0();
+    while (1)
+    {
+        sub_81D4170();
+        if (gUnknown_030012E2 & 2)
+            gShouldAdvanceLinkState = 2;
+
+        var1 = sub_81D3D70(1, arg0, arg1, NULL);
+        gUnknown_030012E4 = var1;
+        if ((gUnknown_030012E4 & 0x13) == 0x10)
+        {
+            result = 0;
+            break;
+        }
+
+        if (gUnknown_030012E4 & 0x8)
+        {
+            result = 1;
+            break;
+        }
+
+        var0 = gUnknown_030012E4 & 0x4;
+        if (var0)
+        {
+            result = 2;
+            break;
+        }
+
+        gShouldAdvanceLinkState = var0;
+        VBlankIntrWait();
+    }
+
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+    sub_81D41F4();
+    return result;
+}
+
+static int unref_sub_81D3BE8(u32 *arg0)
+{
+    int result;
+    u16 var0;
+    int var1;
+
+    sub_81D41A0();
+    while (1)
+    {
+        sub_81D4170();
+        if (gUnknown_030012E2 & 2)
+            gShouldAdvanceLinkState = 2;
+
+        var1 = sub_81D3D70(0, 0, NULL, arg0);
+        gUnknown_030012E4 = var1;
+        if ((gUnknown_030012E4 & 0x13) == 0x10)
+        {
+            result = 0;
+            break;
+        }
+
+        if (gUnknown_030012E4 & 0x8)
+        {
+            result = 1;
+            break;
+        }
+
+        var0 = gUnknown_030012E4 & 0x4;
+        if (var0)
+        {
+            result = 2;
+            break;
+        }
+
+        gShouldAdvanceLinkState = var0;
+        VBlankIntrWait();
+    }
+
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+    sub_81D41F4();
+    return result;
+}
+
+static void sub_81D3C7C(void)
+{
+    REG_IME = 0;
+    REG_IE &= ~(INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL);
+    REG_IME = 1;
+    REG_SIOCNT = 0;
+    REG_TM3CNT_H = 0;
+    REG_IF = INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL;
+}
+
+static void sub_81D3CBC(void)
+{
+    REG_IME = 0;
+    REG_IE &= ~(INTR_FLAG_TIMER3 | INTR_FLAG_SERIAL);
+    REG_IME = 1;
+    REG_RCNT = 0;
+    REG_SIOCNT = SIO_MULTI_MODE;
+    REG_SIOCNT |= SIO_INTR_ENABLE | SIO_115200_BPS;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_SERIAL;
+    REG_IME = 1;
+
+    if (!gUnknown_030012C8.unk0[1])
+        CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+}
+
+static void sub_81D3D34(void)
+{
+    REG_RCNT = 0;
+    REG_SIOCNT = SIO_32BIT_MODE | SIO_INTR_ENABLE;
+    REG_SIOCNT |= SIO_MULTI_SD;
+    gShouldAdvanceLinkState = 0;
+    gUnknown_030012E6 = 0;
+    gUnknown_030012E8 = 0;
+}
+
+int sub_81D3D70(u8 arg0, u32 arg1, u32 *arg2, u32 *arg3)
+{
+    switch (gUnknown_030012C8.unk0[1])
+    {
+    case 0:
+        sub_81D3CBC();
+        gUnknown_030012C8.unk0[2] = 1;
+        gUnknown_030012C8.unk0[1] = 1;
+        break;
+    case 1:
+        if (sub_81D3EE8(arg0))
+            sub_81D413C();
+
+        if (gShouldAdvanceLinkState == 2)
+        {
+            gUnknown_030012C8.unk0[4] = 2;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    case 2:
+        sub_81D3D34();
+        sub_81D3F1C(arg1, arg2, arg3);
+        gUnknown_030012C8.unk0[1] = 3;
+        // fall through
+    case 3:
+        if (gShouldAdvanceLinkState == 2)
+        {
+            gUnknown_030012C8.unk0[4] = 2;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        else
+        {
+            gUnknown_030012E6++;
+            gUnknown_030012E8++;
+            if (!gUnknown_030012C8.unk0[0] && gUnknown_030012E8 > 60)
+            {
+                gUnknown_030012C8.unk0[4] = 1;
+                gUnknown_030012C8.unk0[1] = 6;
+            }
+
+            if (gUnknown_030012C8.unk0[2] != 2)
+            {
+                if (gUnknown_030012C8.unk0[0] && gUnknown_030012E6 > 2)
+                {
+                    sub_81D413C();
+                    gUnknown_030012C8.unk0[2] = 2;
+                }
+                else
+                {
+                    sub_81D413C();
+                    gUnknown_030012C8.unk0[2] = 2;
+                }
+            }
+        }
+        break;
+    case 4:
+        sub_81D3CBC();
+        gUnknown_030012C8.unk0[1] = 5;
+        break;
+    case 5:
+        if (gUnknown_030012C8.unk0[0] == 1 && gUnknown_030012E6 > 2)
+            sub_81D413C();
+
+        if (++gUnknown_030012E6 > 60)
+        {
+            gUnknown_030012C8.unk0[4] = 1;
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    case 6:
+        if (gUnknown_030012C8.unk0[2])
+        {
+            sub_81D3C7C();
+            gUnknown_030012C8.unk0[2] = 0;
+        }
+        break;
+    }
+
+    return gUnknown_030012C8.unk0[2] | (gUnknown_030012C8.unk0[4] << 2) | (gUnknown_030012C8.unk0[3] << 4);
+}
+
+static u16 sub_81D3EE8(u8 arg0)
+{
+    u16 terminal = (*(vu32 *)REG_ADDR_SIOCNT) & (SIO_MULTI_SI | SIO_MULTI_SD);
+    if (terminal == SIO_MULTI_SD && arg0)
+    {
+        gUnknown_030012C8.unk0[0] = 1;
+        return 1;
+    }
+    else
+    {
+        gUnknown_030012C8.unk0[0] = 0;
+        return 0;
+    }
+}
+
+static void sub_81D3F1C(u32 arg0, u32 *arg1, u32 *arg2)
+{
+    if (gUnknown_030012C8.unk0[0])
+    {
+        REG_SIOCNT |= SIO_38400_BPS;
+        gUnknown_030012C8.unk8 = arg1;
+        REG_SIODATA32 = arg0;
+        gUnknown_030012C8.unk10 = arg0 / 4 + 1;
+        sub_81D3F68();
+    }
+    else
+    {
+        REG_SIOCNT = REG_SIOCNT;
+        gUnknown_030012C8.unk8 = arg2;
+    }
+}
+
+static void sub_81D3F68(void)
+{
+    REG_TM3CNT_L = 0xFDA7;
+    REG_TM3CNT_H = TIMER_INTR_ENABLE;
+    REG_IME = 0;
+    REG_IE |= INTR_FLAG_TIMER3;
+    REG_IME = 1;
+}
+
+void sub_81D3F9C(void)
+{
+    sub_81D414C();
+    sub_81D413C();
+}
+
+void sub_81D3FAC(void)
+{
+    u16 i, playerCount, k;
+    u32 value;
+    u16 var0;
+    u16 recvBuffer[4];
+
+    switch (gUnknown_030012C8.unk0[1])
+    {
+    case 1:
+        REG_SIOMLT_SEND = 0xCCD0; // Handshake id
+        *(u64 *)recvBuffer = REG_SIOMLT_RECV;
+        for (i = 0, playerCount = 0, k = 0; i < 4; i++)
+        {
+            if (recvBuffer[i] == 0xCCD0)
+                playerCount++;
+            else if (recvBuffer[i] != 0xFFFF)
+                k++;
+        }
+
+        if (playerCount == 2 && k == 0)
+            gUnknown_030012C8.unk0[1] = 2;
+        break;
+    case 3:
+        value = REG_SIODATA32;
+        if (!gUnknown_030012C8.unkC && !gUnknown_030012C8.unk0[0])
+            gUnknown_030012C8.unk10 = value / 4 + 1;
+
+        if (gUnknown_030012C8.unk0[0] == 1)
+        {
+            if (gUnknown_030012C8.unkC < gUnknown_030012C8.unk10)
+            {
+                REG_SIODATA32 = gUnknown_030012C8.unk8[gUnknown_030012C8.unkC];
+                gUnknown_030012C8.unk14 += gUnknown_030012C8.unk8[gUnknown_030012C8.unkC];
+            }
+            else
+            {
+                REG_SIODATA32 = gUnknown_030012C8.unk14;
+            }
+        }
+        else
+        {
+            if (gUnknown_030012C8.unkC > 0 && gUnknown_030012C8.unkC < gUnknown_030012C8.unk10 + 1)
+            {
+                gUnknown_030012C8.unk8[gUnknown_030012C8.unkC - 1] = value;
+                gUnknown_030012C8.unk14 += value;
+            }
+            else if (gUnknown_030012C8.unkC)
+            {
+                if (gUnknown_030012C8.unk14 == value)
+                    gUnknown_030012C8.unk0[3] = 1;
+                else
+                    gUnknown_030012C8.unk0[3] = 2;
+            }
+
+            gUnknown_030012E8 = 0;
+        }
+
+        if (++gUnknown_030012C8.unkC < gUnknown_030012C8.unk10 + 2)
+        {
+            if (gUnknown_030012C8.unk0[0])
+                REG_TM3CNT_H |= TIMER_ENABLE;
+            else
+                sub_81D413C();
+        }
+        else
+        {
+            gUnknown_030012C8.unk0[1] = 4;
+            gUnknown_030012E6 = 0;
+        }
+        break;
+    case 5:
+        if (!gUnknown_030012C8.unk0[0])
+            REG_SIOMLT_SEND = gUnknown_030012C8.unk0[3];
+
+        *(u64 *)recvBuffer = REG_SIOMLT_RECV;
+        var0 = recvBuffer[1] - 1;
+        if (var0 < 2)
+        {
+            if (gUnknown_030012C8.unk0[0] == 1)
+                gUnknown_030012C8.unk0[3] = recvBuffer[1];
+
+            gUnknown_030012C8.unk0[1] = 6;
+        }
+        break;
+    }
+}
+
+static void sub_81D413C(void)
+{
+    REG_SIOCNT |= SIO_ENABLE;
+}
+
+static void sub_81D414C(void)
+{
+    REG_TM3CNT_H &= ~TIMER_ENABLE;
+    REG_TM3CNT_L = 0xFDA7;
+}
+
+static void sub_81D4170(void)
+{
+    int keysMask = REG_KEYINPUT ^ KEYS_MASK;
+    gUnknown_030012E2 = keysMask & ~gUnknown_030012E0;
+    gUnknown_030012E0 = keysMask;
+}
+
+void sub_81D41A0(void)
+{
+    gUnknown_030012EC = REG_IME;
+    gUnknown_030012EE = REG_IE;
+    gUnknown_030012F0 = REG_TM3CNT_H;
+    gUnknown_030012F2 = REG_SIOCNT;
+    gUnknown_030012F4 = REG_RCNT;
+}
+
+void sub_81D41F4(void)
+{
+    REG_IME = gUnknown_030012EC;
+    REG_IE = gUnknown_030012EE;
+    REG_TM3CNT_H = gUnknown_030012F0;
+    REG_SIOCNT = gUnknown_030012F2;
+    REG_RCNT = gUnknown_030012F4;
+}
+
+void sub_81D4238(void)
+{
+    CpuFill32(0, &gUnknown_030012C8, sizeof(struct Unknown030012C8));
+}
+
+u8 sub_81D4258(void)
+{
+    u8 eventObjectId;
+    TryGetEventObjectIdByLocalIdAndMap(1, gSaveBlock1Ptr->location.mapNum, gSaveBlock1Ptr->location.mapGroup, &eventObjectId);
+    return eventObjectId;
+}
diff --git a/src/event_object_movement.c b/src/event_object_movement.c
index ba62db10d..8ebdd883f 100644
--- a/src/event_object_movement.c
+++ b/src/event_object_movement.c
@@ -3,6 +3,7 @@
 #include "battle_pyramid.h"
 #include "berry.h"
 #include "decoration.h"
+#include "ereader.h"
 #include "event_data.h"
 #include "event_object_movement.h"
 #include "event_scripts.h"
@@ -15,7 +16,6 @@
 #include "metatile_behavior.h"
 #include "overworld.h"
 #include "palette.h"
-#include "pokenav.h"
 #include "random.h"
 #include "sprite.h"
 #include "task.h"
diff --git a/src/trainer_hill.c b/src/trainer_hill.c
index 43b29e26e..7bb1b997a 100644
--- a/src/trainer_hill.c
+++ b/src/trainer_hill.c
@@ -3,6 +3,7 @@
 #include "battle.h"
 #include "battle_tower.h"
 #include "battle_setup.h"
+#include "ereader.h"
 #include "event_data.h"
 #include "event_scripts.h"
 #include "fieldmap.h"
@@ -32,8 +33,6 @@
 #include "constants/easy_chat.h"
 #include "constants/trainer_hill.h"
 
-extern bool32 sub_81D3B34(void);
-
 #define HILL_TAG_NORMAL 0
 #define HILL_TAG_VARIETY 1
 #define HILL_TAG_UNIQUE 2