Add dummy module for VDP dialog

src/game_vdp_graphics.s

@@ -37,6 +37,35 @@ ClearTile$:
 			bne		ClearLine$
 
 			rts
+			
+vdp_clear_dialog:
+T_NT_IDX$:	.equ	_Zp+4
+T_Y$:		.equ	_Zp+1
+T_X$:		.equ	_Zp+0
+
+			
+			lda		#0x01
+			sta		zp:T_NT_IDX$
+			lda		#0x04
+			sta		zp:T_X$
+			lda		#15
+			sta		zp:T_Y$
+			ldy		#9
+			
+ClearLine$:
+			jsr		vdp_point_to_vram_xy
+			lda		#0x00
+			ldx		#24
+ClearTile$:
+			sta		VDP_MEM
+			dex
+			bne		ClearTile$
+			
+			dec		zp:T_Y$
+			dey
+			bne		ClearLine$
+
+			rts
 
 ;;; vdp_draw_numtile:
 ;;; 	Draws the 2048 tile at specified coordinates
@@ -124,4 +153,5 @@ TileNum_Y_Map:
 ;;;;;;;;;;;;;;;;;;
 			.public vdp_draw_numtile
 			.public vdp_clear_gamegrid
+			.public vdp_clear_dialog