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antic.c: reduce tagmap lookups (nw)

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This commit is contained in:
Wilbert Pol 2015-08-14 13:50:22 +02:00
parent 7834ef5485
commit c9d255b26f
2 changed files with 9 additions and 3 deletions
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9
src/mame/video/antic.c
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@ -29,6 +29,9 @@ antic_device::antic_device(const machine_config &mconfig, const char *tag, devic
device_t(mconfig, ATARI_ANTIC, "Atari ANTIC", tag, owner, clock, "antic", __FILE__),
device_video_interface(mconfig, *this),
m_gtia_tag(NULL),
m_maincpu(*this, ":maincpu"),
m_djoy_b(*this, ":djoy_b"),
m_artifacts(*this, ":artifacts"),
m_tv_artifacts(0),
m_render1(0),
m_render2(0),
@ -1388,7 +1391,7 @@ void antic_device::render(address_space &space, int param1, int param2, int para
************************************************************************/
UINT32 antic_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
UINT32 new_tv_artifacts = screen.ioport("artifacts")->read_safe(0);
UINT32 new_tv_artifacts = m_artifacts ? m_artifacts->read() : 0;
copybitmap(bitmap, *m_bitmap, 0, 0, 0, 0, cliprect);
if (m_tv_artifacts != new_tv_artifacts)
@ -2081,7 +2084,7 @@ void antic_device::generic_interrupt(int button_count)
if( m_scanline == VBL_START )
{
/* specify buttons relevant to this Atari variant */
m_gtia->button_interrupt(button_count, machine().root_device().ioport("djoy_b")->read_safe(0));
m_gtia->button_interrupt(button_count, m_djoy_b ? m_djoy_b->read() : 0);
/* do nothing new for the rest of the frame */
m_modelines = m_screen->height() - VBL_START;
@ -2095,7 +2098,7 @@ void antic_device::generic_interrupt(int button_count)
LOG((" cause VBL NMI\n"));
/* set the VBL NMI status bit */
m_r.nmist |= VBL_NMI;
machine().device("maincpu")->execute().set_input_line(INPUT_LINE_NMI, PULSE_LINE);
m_maincpu->set_input_line(INPUT_LINE_NMI, PULSE_LINE);
}
}

3
src/mame/video/antic.h
View File

@ -389,6 +389,9 @@ private:
const char *m_gtia_tag;
gtia_device *m_gtia;
required_device<cpu_device> m_maincpu;
optional_ioport m_djoy_b;
optional_ioport m_artifacts;
UINT32 m_tv_artifacts;
int m_render1, m_render2, m_render3;