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added some info

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This commit is contained in:
Roberto Zandona 2009-03-14 14:34:59 +00:00
parent 14d4b8e72e
commit 00632018b5
1 changed files with 2 additions and 0 deletions
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src/mame/video/m57.c
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@ -177,11 +177,13 @@ static void draw_background(running_machine *machine, bitmap_t *bitmap, const re
int y,x; int y,x;
INT16 scrolly; INT16 scrolly;
// from 64 to 127: not wrapped
for (y = 64; y < 128; y++) for (y = 64; y < 128; y++)
tilemap_set_scrollx(bg_tilemap, y, m57_scroll[0x40]); tilemap_set_scrollx(bg_tilemap, y, m57_scroll[0x40]);
tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0); tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
// from 128 to 255: wrapped
for (y = 128; y <= cliprect->max_y; y++) for (y = 128; y <= cliprect->max_y; y++)
{ {
scrolly = m57_scroll[y] + (m57_scroll[y + 0x100] << 8); scrolly = m57_scroll[y] + (m57_scroll[y + 0x100] << 8);