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raiden2: tile_scroll_w safety fence (nw)

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This commit is contained in:
hap 2017-03-13 15:33:43 +01:00
parent b858947a8c
commit c30b223c3d
1 changed files with 5 additions and 3 deletions
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8
src/mame/drivers/raiden2.cpp
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@ -406,15 +406,17 @@ WRITE16_MEMBER(raiden2_state::tilemap_enable_w)
WRITE16_MEMBER(raiden2_state::tile_scroll_w)
{
COMBINE_DATA(scrollvals + offset);
data = scrollvals[offset];
tilemap_t *tm = nullptr;
switch(offset/2) {
case 0: tm = background_layer; break;
case 1: tm = midground_layer; break;
case 2: tm = foreground_layer; break;
default: assert(0); break;
}
COMBINE_DATA(scrollvals + offset);
data = scrollvals[offset];
if(offset & 1)
tm->set_scrolly(0, data);
else