Disassemble home calls to Multiply and Divide

2 files changed, 70 insertions, 4 deletions

diff --git a/home/print_text.asm b/home/print_text.asm
index e8b4eeb..0a17688 100644
--- a/home/print_text.asm
+++ b/home/print_text.asm
@@ -48,4 +48,23 @@ PrintLetterDelay:: ; 33a3 (0:33a3)
 	pop de
 	pop hl
 	ret
-; 0x33e3
\ No newline at end of file
+; 0x33e3
+
+CopyDataUntil:: ; 33e3
+; Copy [hl .. bc) to de.
+
+; In other words, the source data is
+; from hl up to but not including bc,
+; and the destination is de.
+
+.asm_33e3: ; 00:33e3
+	ld a, [hli]
+	ld [de], a
+	inc de
+	ld a, h
+	cp b
+	jr nz, .asm_33e3
+	ld a, l
+	cp c
+	jr nz, .asm_33e3
+	ret
diff --git a/home/util.asm b/home/util.asm
index 6591da2..8efe322 100644
--- a/home/util.asm
+++ b/home/util.asm
@@ -1,12 +1,59 @@
 INCLUDE "constants.asm"
 
 if DEBUG
-SECTION "Misc Utility Functions", ROM0[$341F]
+SECTION "Misc Utility Functions", ROM0[$33EF]
 else
-SECTION "Misc Utility Functions", ROM0[$33E3]
+SECTION "Misc Utility Functions", ROM0[$33B3]
 endc
 
-_341F:: ; 341f
+Function33ef::
+	; hl = src
+	; de  = dest
+	; b = y
+	; c = x
+	push hl
+	push de
+	push bc
+	ld a, b
+	dec a
+	dec a
+	ld b, $0
+.asm_33f7: ; 00:33f7
+	add hl, bc
+	dec a
+	jr nz, .asm_33f7
+	pop bc
+	dec b
+	ld a, b
+	push hl
+	add hl, bc
+	ld d, h
+	ld e, l
+	pop hl
+.asm_3403: ; 00:3403
+	push af
+	push bc
+	call CopyBytes
+	pop bc
+	push bc
+	ld a, c
+	xor $ff
+	ld c, a
+	ld b, $ff
+	inc bc
+	add hl, bc
+	ld d, h
+	ld e, l
+	add hl, bc
+	pop bc
+	pop af
+	dec a
+	jr nz, .asm_3403
+	pop hl
+	pop de
+	jp CopyBytes
+
+SkipNames:: ; 341f
 ; Returns hl + a * 6
     and a
     ret z