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Attempt fixing rowscroll enable for stages 5, 10, ... (nw)

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This commit is contained in:
angelosa 2016-06-01 00:47:25 +02:00
parent 74f2352fba
commit 633bb9e14a
1 changed files with 14 additions and 9 deletions
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23
src/mame/drivers/metlfrzr.cpp
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@ -9,10 +9,11 @@
HW seems the natural evolution of Dark Mist type.
TODO:
- Video registers needs better understanding.
- A few video register bits still needs sorting out (needs HW tests perhaps?)
- Nuke legacy video code and re-do it by using tilemap system.
- sprites are ahead of 1/2 frames;
- Writes at 0xb800-0xbfff at attract mode gameplay demo transition?
- Writes at 0xb800-0xbfff or 0x8000-0x9fff during gameplays? Debug?
- Flip screen support;
- Why service mode returns all inputs as high? And why sound test doesn't seem to function at all, both BTANBs perhaps?
**************************************************************************************************************************/
@ -55,6 +56,7 @@ public:
DECLARE_WRITE8_MEMBER(output_w);
TIMER_DEVICE_CALLBACK_MEMBER(scanline);
UINT8 m_fg_tilebank;
bool m_rowscroll_enable;
};
@ -86,7 +88,7 @@ void metlfrzr_state::legacy_bg_draw(bitmap_ind16 &bitmap,const rectangle &clipre
{
int tile_base = count;
int y = (count % 32);
if(y > 7 || m_video_regs[0x06] & 3) // TODO: this condition breaks on level 5 halfway thru.
if(y > 7 || m_rowscroll_enable == false)
{
tile_base+= x_scroll_base;
x_scroll_shift = (x_scroll_value & 7);
@ -144,7 +146,7 @@ void metlfrzr_state::legacy_obj_draw(bitmap_ind16 &bitmap,const rectangle &clipr
UINT32 metlfrzr_state::screen_update_metlfrzr(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
bitmap.fill(m_palette->black_pen(), cliprect);
legacy_bg_draw(bitmap,cliprect);
legacy_obj_draw(bitmap,cliprect);
return 0;
@ -156,13 +158,15 @@ WRITE8_MEMBER(metlfrzr_state::output_w)
// bit 6-5: coin lockouts
// bit 4: tilemap ROM banking
// bit 3-2: z80 ROM banking
// bit 1-0: unknown purpose, both 1s too generally
// bit 1: enabled during gameplay, rowscroll enable?
// bit 0: enabled , unknown purpose (lamp?)
machine().bookkeeping().coin_lockout_w(1, BIT(data,6) );
machine().bookkeeping().coin_lockout_w(0, BIT(data,5) );
m_fg_tilebank = (data & 0x10) >> 4;
membank("bank1")->set_entry((data & 0xc) >> 2);
// popmessage("%02x",data & 3);
m_rowscroll_enable = bool(BIT(data,1));
// popmessage("%02x %02x",m_fg_tilebank,data & 3);
}
static ADDRESS_MAP_START( metlfrzr_map, AS_PROGRAM, 8, metlfrzr_state )
@ -282,7 +286,8 @@ static INPUT_PORTS_START( metlfrzr )
PORT_DIPSETTING( 0x10, "2" )
PORT_DIPSETTING( 0x30, "3" )
PORT_DIPSETTING( 0x00, "4" )
PORT_DIPNAME( 0x40, 0x00, DEF_STR( Level_Select ) ) PORT_DIPLOCATION("SW2:7")
// disabling following enables intro / how to play screens
PORT_DIPNAME( 0x40, 0x40, DEF_STR( Level_Select ) ) PORT_DIPLOCATION("SW2:7")
PORT_DIPSETTING( 0x40, DEF_STR( Off ) )
PORT_DIPSETTING( 0x00, DEF_STR( On ) )
PORT_DIPNAME( 0x80, 0x00, DEF_STR( Demo_Sounds ) ) PORT_DIPLOCATION("SW2:8")
@ -451,4 +456,4 @@ DRIVER_INIT_MEMBER(metlfrzr_state, metlfrzr)
GAME( 1989, metlfrzr, 0, metlfrzr, metlfrzr, metlfrzr_state, metlfrzr, ROT270, "Seibu", "Metal Freezer", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_COCKTAIL )
GAME( 1989, metlfrzr, 0, metlfrzr, metlfrzr, metlfrzr_state, metlfrzr, ROT270, "Seibu", "Metal Freezer (Japan)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_COCKTAIL )