Disassemble map script function

Part 1 of disassembling map loading functions

3 files changed, 29 insertions, 3 deletions

diff --git a/home/map.asm b/home/map.asm
new file mode 100644
index 0000000..2583643
--- /dev/null
+++ b/home/map.asm
@@ -0,0 +1,26 @@
+INCLUDE "constants.asm"
+
+SECTION "Map functions", ROM0[$20FF]
+
+; Runs a map script indexed by wMapScriptNumber
+RunMapScript:: ; 20ff
+	push hl
+	push de
+	push bc
+	ld a, [wMapScriptNumber]
+	add a, a
+	add a, a
+	ld d, 0
+	ld e, a
+	add hl, de
+	ld a, [hli]
+	ld h, [hl]
+	ld l, a
+	ld de, .return
+	push de
+	jp hl
+.return
+	pop bc
+	pop de
+	pop hl
+	ret
diff --git a/shim.sym b/shim.sym
index f704139..0c6ab65 100644
--- a/shim.sym
+++ b/shim.sym
@@ -111,7 +111,7 @@
 ; Structure:
 ; byte Map group ($ff = end)
 ; byte Map ID
-; ptr  Copied to c5e9, also byte pointed to written at wUnknownIdc5e8
+; ptr  Copied to c5e9, also byte pointed to written at wMapScriptNumber
 ; ptr  Copied to c5eb
 ; word Unknown (2 bytes)
 05:470e UnknownMapBufferPointers
diff --git a/wram.asm b/wram.asm
index 0dd872f..f98b66c 100644
--- a/wram.asm
+++ b/wram.asm
@@ -98,8 +98,8 @@ SECTION "Unknown map buffer?", WRAM0[$C5E8]
 
 wMapBuffer::
 wMapScriptNumber:: db ; c5e8
-wUnknownIdC5E8Location:: dw ; c5e9
-wUnknownMapPointer:: dw ; c5eb
+wMapScriptNumberLocation:: dw ; c5e9
+wUnknownMapPointer:: dw ; c5eb ; TODO
     ds 19 ; TODO
 wMapBufferEnd:: ; c600