7 files changed, 227 insertions, 0 deletions
diff --git a/common/battle_e_transfer.asm b/common/battle_e_transfer.asm
new file mode 100644
index 0000000..bc4f4e0
--- /dev/null
+++ b/common/battle_e_transfer.asm
@@ -0,0 +1,71 @@
+TransferData:
+	LD_IND_HL SomeVar2
+	push de
+	ld hl, $BBBB
+	LD_IND_HL Space_1 ; Space_1 = $BBBB
+	EX_DE_HL
+	LD_IND_HL Space_2 ; store transfer length in Space_2, which is odd,
+	                  ; because we never refer to it again
+	API_0C7 Space_1
+
+	wait 1
+	pop hl ; number of bytes to transfer
+
+	; calculate number of words to transfer:
+	; de = (hl + 1) >> 1
+	inc hl
+	ld b, 1
+	call WordShiftRight
+	EX_DE_HL
+
+.asm_18FE
+	ld a, e
+	or d
+	ret z
+	; while de > 0…
+
+	ld hl, $8888
+	LD_IND_HL Space_1 ; Space_1 = $8888
+	ld a, $01
+	LD_IND_A SomeVar1 ; SomeVar1 = 1
+
+.asm_190C
+	LD_A_IND SomeVar1 ; a = SomeVar1
+	cp $08
+	jr nc, .asm_193B
+
+	push de
+	LD_HL_IND SomeVar2
+	ld c, [hl]
+	inc hl
+	ld b, [hl]
+	inc hl
+	LD_IND_HL SomeVar2
+	ld hl, SomeVar1
+	ld l, [hl]
+	ld h, $00
+	add hl, hl
+	ld de, Space_1
+	add hl, de
+	ld [hl], c
+	inc hl
+	ld [hl], b
+	pop de
+	dec de
+	ld a, e
+	or d
+	jr z, .asm_193B
+
+	ld hl, SomeVar1
+	ld a, $01
+	add a, [hl]
+	ld [hl], a
+	jr .asm_190C
+
+.asm_193B ; if SomeVar1 > 8
+	push de
+	API_0C7 Space_1 ; this must be the data transfer? it’s the only API function called
+
+	wait 1
+	pop de
+	jr .asm_18FE
+\ No newline at end of file
diff --git a/common/mem_struct.asm b/common/mem_struct.asm
new file mode 100644
index 0000000..148d021
--- /dev/null
+++ b/common/mem_struct.asm
@@ -0,0 +1,15 @@
+; what do these store?
+Space_1:
+	db 0,0
+Space_2:
+	REPT 14
+		db 0
+	ENDR
+Space_3:
+	REPT 32
+		db 0
+	ENDR
+Space_4:
+	db 0,0
+Space_5:
+	db 0,0
+\ No newline at end of file
diff --git a/common/transfer_data.asm b/common/transfer_data.asm
new file mode 100644
index 0000000..0276d7c
--- /dev/null
+++ b/common/transfer_data.asm
@@ -0,0 +1,31 @@
+	API_106 $0040, UNKNOWN_VALUE
+
+.asm_1bfe
+	waita $01
+
+	ld hl, Space_3
+	API $0C8
+
+	or a
+	jr nz, .asm_1c18
+
+	IS_SOUND_PLAYING 1 ; return
+
+.asm_1c18
+	LD_HL_IND Space_3
+	LD_IND_HL Space_4
+	ld a, l
+	cp $22
+	jr nz, .asm_1bfe
+
+	ld a, h
+	cp $22
+	jr nz, .asm_1bfe
+
+	ld de, 60 ; transfer length
+	ld hl, Prologue
+	call TransferData
+
+	ld de, DATA_TRANSFER_LENGTH ; transfer length
+	ld hl, DataPacket
+	call TransferData
+\ No newline at end of file
diff --git a/common/wait_for_link.asm b/common/wait_for_link.asm
new file mode 100644
index 0000000..e317728
--- /dev/null
+++ b/common/wait_for_link.asm
@@ -0,0 +1,36 @@
+	ret c
+	nop
+	wait 32
+	ld l, $02
+	push hl
+	ld bc, $B9A0
+	ld de, $0076
+	ld a, $08
+	API $0C4
+	pop bc
+.asm_1b64
+	API $0DB
+
+	cp $01
+	jr z, .asm_1b6f
+	API $0DB
+	or a
+	jr nz, .asm_1b76
+.asm_1b6f
+	waita $01
+	API $0C5
+	jr .asm_1b64
+
+.asm_1b76
+	waita $01
+	LD_HL_IND $00C2
+	ld a, l
+	and $02
+	jr z, .asm_1b90
+
+	IS_SOUND_PLAYING 2 ; exit
+
+.asm_1b90
+	API $0CA
+	cp $02
+	jr c, .asm_1b76
+\ No newline at end of file
diff --git a/common/wait_for_ready.asm b/common/wait_for_ready.asm
new file mode 100644
index 0000000..8344422
--- /dev/null
+++ b/common/wait_for_ready.asm
@@ -0,0 +1,30 @@
+.asm_1baf
+	waita $01
+	API $0DB
+
+	ld l, a
+	ld h, $00
+	LD_IND_HL Space_5
+	API $0CA
+
+	cp $02
+	jr nc, .asm_1bd4
+
+	ld hl, UNKNOWN_VALUE
+	SOUND_PAUSE
+
+	IS_SOUND_PLAYING 1 ; return
+
+.asm_1bd4
+	LD_HL_IND Space_5
+	ld a, l
+	sub $04
+	or h
+	jr z, .asm_1be6
+
+	LD_HL_IND Space_5
+	ld a, l
+	sub $03
+	or h
+	jr nz, .asm_1baf
+.asm_1be6
+\ No newline at end of file
diff --git a/common/word_shift_right.asm b/common/word_shift_right.asm
new file mode 100644
index 0000000..7a76280
--- /dev/null
+++ b/common/word_shift_right.asm
@@ -0,0 +1,15 @@
+WordShiftRight:
+	; this function shifts HL by B bits to the right
+	inc b
+.asm_1B93
+	dec b
+	ret z
+	
+	and a
+	ld a, h
+	rra
+	ld h, a 
+	ld a, l
+	rra
+	ld l, a
+	jp .asm_1B93
+\ No newline at end of file
diff --git a/common/wrap_up.asm b/common/wrap_up.asm
new file mode 100644
index 0000000..157b6ef
--- /dev/null
+++ b/common/wrap_up.asm
@@ -0,0 +1,29 @@
+.asm_1c60
+	waita 1
+
+	LD_HL_IND $00C2
+	ld a, l
+	and $01
+	jr z, .asm_1c7c
+
+	; IS_SOUND_PLAYING 1
+	API $08D
+	dec b ; was this supposed
+	nop   ; to be ld b, $00?
+	ld e, $01
+	ld hl, $0005 ; was this supposed to be $0006?
+	API $119
+	ld a, $01 ; return
+	EXIT
+
+	jr .asm_1c60
+
+.asm_1c7c
+	LD_HL_IND $00C2
+	ld a, l
+	and $02
+	jr z, .asm_1c60
+
+	IS_SOUND_PLAYING 2
+
+	jr .asm_1c60
+\ No newline at end of file