Responds to NMI

test_gfx.asm

@@ -2,11 +2,28 @@
 .include "snes_init.asm"
 .include "my_custom.asm"
 
+
+.EQU PalNum $0000
+
 .BANK 0 SLOT 0
 .org 0
 .section "Vblank"
 
 VBlank:
+
+    Set_A_8_XY_16
+
+    stz $2115
+    ldx #$0400 ;setup VRAM
+
+    ldx #$0400
+    stx $2116  ; VRAM address
+
+    lda PalNum
+    sta $2119
+
+    lda $4210 ; clear NMI flag
+
     rti
 
 .ENDS
@@ -52,6 +69,8 @@ Start:
 
     Set_A_8_XY_16
 
+    stz PalNum
+
     Load_Palette_Color $00, $00
     Load_Palette_Color $00, $00
     Load_Palette_Color $00, $00
@@ -84,21 +103,25 @@ Start:
     Enable_NMI_And_Joypad
 
 mainloop:
-    Spin_Loop $02
 
-    Reset_Palette_Offset
-    Load_Palette_Color $00, $00
-    Load_Palette_Color $00, $00
-    Load_Palette_Color $00, $00
-    Load_Palette_Color $ff, $0a
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
+    wai
 
-    Spin_Loop $02
-
-    Reset_Palette_Offset
-    Load_Palette_Color $ff, $a0
-    Load_Palette_Color $00, $00
-    Load_Palette_Color $00, $00
-    Load_Palette_Color $ff, $0a
+    lda PalNum
+    clc
+    adc #$04
+    and #$1c
+    sta PalNum
 
     jmp mainloop