Double-pass rastering the background bitmap due to new emulator behavior (bug?).

Author: SlithyMatt

game.asm

@@ -90,28 +90,9 @@ check_input:
    ; load level 1 bitmap from banked RAM into layer 0
    lda #7
    jsr set_bg_palette
-   stz VERA_ctrl
-   VERA_SET_ADDR VRAM_BITMAP, 1
-   lda #BITMAP_BANK
-   ldx #0
-   ldy #0
-   jsr bank2vram
-   lda #(BITMAP_BANK+1)
-   ldx #0
-   ldy #0
-   jsr bank2vram
-   lda #(BITMAP_BANK+2)
-   ldx #0
-   ldy #0
-   jsr bank2vram
-   lda #(BITMAP_BANK+3)
-   ldx #0
-   ldy #0
-   jsr bank2vram
-   lda #(BITMAP_BANK+4)
-   ldx #0
-   ldy #$B0
-   jsr bank2vram
+   ; raster the bitmap twice to make sure it takes
+   jsr raster_bitmap
+   jsr raster_bitmap
    lda #15
    jsr set_bg_palette
    stz VERA_ctrl
@@ -147,4 +128,29 @@ check_input:
 check_input_return:
    rts
 
+raster_bitmap:
+   stz VERA_ctrl
+   VERA_SET_ADDR VRAM_BITMAP, 1
+   lda #BITMAP_BANK
+   ldx #0
+   ldy #0
+   jsr bank2vram
+   lda #(BITMAP_BANK+1)
+   ldx #0
+   ldy #0
+   jsr bank2vram
+   lda #(BITMAP_BANK+2)
+   ldx #0
+   ldy #0
+   jsr bank2vram
+   lda #(BITMAP_BANK+3)
+   ldx #0
+   ldy #0
+   jsr bank2vram
+   lda #(BITMAP_BANK+4)
+   ldx #0
+   ldy #$B0
+   jsr bank2vram
+   rts
+
 .endif

x16.inc

@@ -90,6 +90,20 @@ RAM_WIN_SIZE      = $2000
 ROM_WIN           = $C000
 
 ; Kernal Subroutines
+GRAPH_LL_init                  := $FEF6
+GRAPH_LL_get_info              := $FEF9
+GRAPH_LL_set_palette           := $FEFC
+GRAPH_LL_cursor_position       := $FEFF
+GRAPH_LL_cursor_next_line      := $FF02
+GRAPH_LL_get_pixel             := $FF05
+GRAPH_LL_get_pixels            := $FF08
+GRAPH_LL_set_pixel             := $FF0B
+GRAPH_LL_set_pixels            := $FF0E
+GRAPH_LL_set_8_pixels          := $FF11
+GRAPH_LL_set_8_pixels_opaque   := $FF14
+GRAPH_LL_fill_pixels           := $FF17
+GRAPH_LL_filter_pixels         := $FF1A
+GRAPH_LL_move_pixels           := $FF1D
 JOYSTICK_SCAN     := $FF53
 JOYSTICK_GET		:= $FF56
 MOUSE_CONFIG		:= $FF68