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l9nibble: If it's a tms9900, put one, because the 9980 address space is too small [O. Galibert]

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This commit is contained in:
Olivier Galibert 2016-06-21 19:37:50 +02:00
parent 32e116c433
commit c3bb1fa7b1
1 changed files with 9 additions and 9 deletions
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18
src/mame/drivers/nibble.cpp
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@ -65,9 +65,9 @@ public:
m_maincpu(*this, "maincpu"),
m_gfxdecode(*this, "gfxdecode") { }
required_shared_ptr<UINT8> m_videoram;
required_shared_ptr<UINT16> m_videoram;
tilemap_t *m_bg_tilemap;
DECLARE_WRITE8_MEMBER(nibble_videoram_w);
DECLARE_WRITE16_MEMBER(nibble_videoram_w);
TILE_GET_INFO_MEMBER(get_bg_tile_info);
virtual void machine_start() override;
@ -85,10 +85,11 @@ public:
* Video Hardware *
*************************/
WRITE8_MEMBER(nibble_state::nibble_videoram_w)
WRITE16_MEMBER(nibble_state::nibble_videoram_w)
{
m_videoram[offset] = data;
m_bg_tilemap->mark_tile_dirty(offset);
COMBINE_DATA(m_videoram+offset);
m_bg_tilemap->mark_tile_dirty(offset*2);
m_bg_tilemap->mark_tile_dirty(offset*2+1);
}
@ -100,7 +101,7 @@ TILE_GET_INFO_MEMBER(nibble_state::get_bg_tile_info)
---- ---- color code.
---- ---- seems unused.
*/
int code = m_videoram[tile_index];
UINT8 code = m_videoram[tile_index/2] >> (tile_index & 1 ? 0 : 8);
SET_TILE_INFO_MEMBER(0 /* bank */, code, 0 /* color */, 0);
}
@ -147,7 +148,7 @@ void nibble_state::machine_reset()
* Memory Map Information *
*************************/
static ADDRESS_MAP_START( nibble_map, AS_PROGRAM, 8, nibble_state )
static ADDRESS_MAP_START( nibble_map, AS_PROGRAM, 16, nibble_state )
// ADDRESS_MAP_GLOBAL_MASK(0x3fff)
AM_RANGE(0x0000, 0xbfff) AM_ROM
AM_RANGE(0xc000, 0xc3ff) AM_WRITE(nibble_videoram_w) AM_SHARE("videoram") // placeholder
@ -301,8 +302,7 @@ GFXDECODE_END
static MACHINE_CONFIG_START( nibble, nibble_state )
// CPU should be switched to TMS9900
MCFG_TMS99xx_ADD("maincpu", TMS9980A, MASTER_CLOCK/4, nibble_map, nibble_cru_map)
MCFG_TMS99xx_ADD("maincpu", TMS9900, MASTER_CLOCK/4, nibble_map, nibble_cru_map)
MCFG_CPU_VBLANK_INT_DRIVER("screen", nibble_state, nibble_interrupt)
/* video hardware */