Start player draw code

.gitignore

@@ -1,3 +1,4 @@
 is.gb
 is.gb.sym
-*.o
+*.o
+*.2bpp

Makefile

@@ -1,10 +1,22 @@
+PNGFILES := $(shell find png -type f -name '*.png')
+IMGFILES := $(PNGFILES:%.png=%.2bpp)
+
 SFILES := $(shell find src -type f -name '*.s')
 OFILES := $(SFILES:%.s=%.o)
-OUTPUT := is.gb
 
-$(OUTPUT): $(OFILES)
+.PHONY: clean
+
+is.gb is.gb.sym: $(IMGFILES) $(OFILES)
 	rgblink -o $@ -n $@.sym $(OFILES)
 	rgbfix -v $@
 
+$(OFILES): $(IMGFILES)
+
 %.o: %.s
-	rgbasm -o $@ $<
+	rgbasm -o $@ $<
+
+%.2bpp: %.png
+	rgbgfx -o $@ $<
+
+clean:
+	rm -f is.gb is.gb.sym $(IMGFILES) $(OFILES)

src/main.s

@@ -13,5 +13,18 @@ endr
 SECTION "Code", ROM0
 
 start:
+    call PlayerInit
+
+    ; enable lcd and interrupts
+    ld hl, rLCDC
+    set 7, [hl]
+    ei
+
+.vbl:
+    ld a, [$ff41]
+    and 3
+    cp 1
+    jr nz, .vbl
+
     halt
-    jp start
+    jp .vbl

src/player.s

@@ -0,0 +1,43 @@
+INCLUDE "hardware.inc"
+
+Section "Player Data", WRAM0
+
+playerWorldX: dw
+playerWorldY: dw
+
+; Sprite data
+playerScreenX: db
+playerScreenY: db
+playerTileIndex: db
+playerFlags: db
+
+Section "Player Code", ROM0
+
+spriteData:
+    INCBIN "png/player.2bpp"
+
+PlayerInit::
+    ld a, 8
+    ld hl, playerScreenX
+    ld [hl], a
+
+    ld bc, _VRAM8800
+    ld hl, spriteData
+    ld d, 16
+    call memcpy
+
+    ld hl, playerScreenX
+    ld a, 8
+    ld [hli], a
+    ld a, 144-8*3
+    ld [hli], a
+
+    ld bc, _OAMRAM
+    ld hl, playerScreenX
+    ld d, 4
+    call memcpy
+
+    ret
+
+PlayerDraw::
+    ret

src/util.s

@@ -0,0 +1,13 @@
+SECTION "Utilities", ROM0
+
+; Copies data between two regions
+; @param d  Size (in bytes) to copy. Must be >0
+; @param bc Pointer to the destination region
+; @param hl Pointer to the source region
+memcpy::
+    ld a, [hli]
+    ld [bc], a
+    inc bc
+    dec d
+    jr nz, memcpy
+    ret