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some xavix visible area register tweaks based on studying video evidence (nw)

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This commit is contained in:
DavidHaywood 2018-10-13 20:03:34 +01:00
parent a56f3ebf85
commit 32bbbe5b34
2 changed files with 22 additions and 43 deletions
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45
src/mame/machine/xavix.cpp
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@ -409,7 +409,9 @@ WRITE8_MEMBER(xavix_state::irq_source_w)
void xavix_state::machine_start()
{
// card night expects RAM to be initialized to 0xff or it will show the pause menu over the startup graphics?!
// don't do this every reset or it breaks the baseball 2 secret mode toggle which flips a bit in RAM
std::fill_n(&m_mainram[0], 0x4000, 0xff);
}
void xavix_state::machine_reset()
@ -448,40 +450,13 @@ void xavix_state::machine_reset()
m_soundregs[12] = 0;
m_soundregs[13] = 0;
for (int i = 0; i < 3; i++)
m_multparams[i] = 0;
for (int i = 0; i < 2; i++)
m_multresults[i] = 0;
for (int i = 0; i < 2; i++)
{
m_spritefragment_dmaparam1[i] = 0;
m_spritefragment_dmaparam2[i] = 0;
}
for (int i = 0; i < 8; i++)
{
m_tmap1_regs[i] = 0;
m_tmap2_regs[i] = 0;
}
for (int i = 0; i < 3; i++)
{
m_txarray[i] = 0x00;
}
for (int i = 0; i < 0x800; i++)
{
// taito nostalgia 1 never initializes the ram at 0x6400 but there's no condition on using it at present?
m_fragment_sprite[i] = 0x00;
}
for (int i = 0; i < 0x4000; i++)
{
// card night expects RAM to be initialized to 0xff or it will show the pause menu over the startup graphics?!
m_mainram[i] = 0xff;
}
std::fill(std::begin(m_multparams), std::end(m_multparams), 0x00);
std::fill(std::begin(m_multresults), std::end(m_multresults), 0x00);
std::fill(std::begin(m_spritefragment_dmaparam1), std::end(m_spritefragment_dmaparam1), 0x00);
std::fill(std::begin(m_tmap1_regs), std::end(m_tmap1_regs), 0x00);
std::fill(std::begin(m_tmap2_regs), std::end(m_tmap2_regs), 0x00);
std::fill(std::begin(m_txarray), std::end(m_txarray), 0x00);
std::fill_n(&m_fragment_sprite[0], 0x800, 0x00); // taito nostalgia 1 never initializes the ram at 0x6400 but there's no condition on using it at present?
m_lowbus->set_bank(0);
}

20
src/mame/video/xavix.cpp
View File

@ -674,15 +674,19 @@ uint32_t xavix_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap,
if (m_arena_control & 0x01)
{
// some games enable it with both regs as 00, which causes a problem
if (m_arena_start > m_arena_end)
/* Controls the clipping area (for all layers?) used for effect at start of Slap Fight and to add black borders in other cases
based on Slap Fight Tiger lives display (and reference videos) this is slightly offset as all status bar gfx must display
Monster Truck black bars are wider on the right hand side, but this matches with the area in which the tilemap is incorrectly rendered so seems to be intentional
Snowboard hides garbage sprites on the right hand side with this, confirming the right hand side offset
Taito Nostalgia 1 'Gladiator' portraits in demo mode are cut slightly due to the area specified, again the cut-off points for left and right are confirmed as correct on hardware
some games enable it with both regs as 00, which causes a problem, likewise ping pong sets both to 0xff
but Slap Fight Tiger has both set to 0x82 at a time when everything should be clipped
*/
if (((m_arena_start != 0x00) && (m_arena_end != 0x00)) && ((m_arena_start != 0xff) && (m_arena_end != 0xff)))
{
// controls the clipping area (for all layers?) used for effect at start of Slap Fight and to add black borders in other cases
// based on Slap Fight Tiger lives display (and reference videos) this is slightly offset as all gfx must display
// other games don't correct the offset so will display a tiny bit of extra space at times?
// (there is some tilemap draw-in on Monster Truck)
clip.max_x = m_arena_start + 1;
clip.min_x = m_arena_end - 2;
clip.max_x = m_arena_start - 3;
clip.min_x = m_arena_end - 1;
if (clip.min_x < cliprect.min_x)
clip.min_x = cliprect.min_x;