diff options
Diffstat (limited to 'src-68k/video/bg.68k')
| -rw-r--r-- | src-68k/video/bg.68k | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src-68k/video/bg.68k b/src-68k/video/bg.68k new file mode 100644 index 0000000..c64e287 --- /dev/null +++ b/src-68k/video/bg.68k @@ -0,0 +1,43 @@ +;**************************************************************************** +; DrawBG +; Draws the background +;**************************************************************************** + +DrawBG: + lea ($C00004), a2 + lea ($C00000), a1 + + lea (@BGData), a0 + move.l #$60000003, d0 + moveq #28-1, d6 +@YLoop: + move.l d0, (a2) + moveq #40-1, d7 +@XLoop: + move.w (a0)+, (a1) + dbf d7, @XLoop + add.l #$00800000, d0 + dbf d6, @YLoop + + lea (@BGData), a0 + move.l #$60000002, d0 + moveq #28-1, d6 +@YLoop2: + move.l d0, (a2) + moveq #40-1, d7 +@XLoop2: + move.w (a0)+, d1 + bset.l #11, d1 + move.w d1, (a1) + dbf d7, @XLoop2 + add.l #$00800000, d0 + dbf d6, @YLoop2 + + rts ; End of subroutine + +;**************************************************************************** +; Background data +;**************************************************************************** + +@BGData: + incbin "data/bg.bin" |