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casio/pv1000.cpp: Three tiny changes (#12570)

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* casio/pv1000.cpp: Add support for 'render disable' control

* casio/pv1000.cpp: Pixels are distinctly non-square

* casio/pv1000.cpp: at least support banking the pattern data over the entire cartridge (although it should be over the entire memory region)
This commit is contained in:
lidnariq 2024-07-23 19:27:25 +01:00 committed by GitHub
parent c8777b7d3d
commit 9f31d42e2d
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GPG Key ID: B5690EEEBB952194
1 changed files with 15 additions and 2 deletions
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17
src/mame/casio/pv1000.cpp
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@ -200,6 +200,7 @@ private:
uint8_t m_force_pattern = 0;
uint8_t m_fd_buffer_flag = 0;
uint8_t m_border_col = 0;
uint8_t m_render_disable = 0;
uint8_t * m_gfxram = nullptr;
void pv1000_postload();
@ -262,8 +263,9 @@ void pv1000_state::io_w(offs_t offset, uint8_t data)
// case 0x06 VRAM + PCG location, always fixed at 0xb8xx
case 0x07:
/* ---- -xxx unknown, border color? */
m_pcg_bank = (data & 0x20) >> 5;
m_pcg_bank = (data & 0xe0) >> 5;
m_force_pattern = ((data & 0x10) >> 4); /* Dig Dug relies on this */
m_render_disable = ((data & 0x08) >> 3);
m_border_col = data & 7;
break;
}
@ -355,6 +357,9 @@ uint32_t pv1000_state::screen_update_pv1000(screen_device &screen, bitmap_ind16
{
bitmap.fill(m_border_col); // border is on top and bottom
if (m_render_disable)
return 0;
for (int y = 0; y < 24; y++)
{
for (int x = 2; x < 30; x++) // left-right most columns never even drawn, black instead
@ -438,6 +443,7 @@ void pv1000_state::machine_start()
save_item(NAME(m_force_pattern));
save_item(NAME(m_fd_buffer_flag));
save_item(NAME(m_border_col));
save_item(NAME(m_render_disable));
machine().save().register_postload(save_prepost_delegate(FUNC(pv1000_state::pv1000_postload), this));
}
@ -479,6 +485,13 @@ void pv1000_state::pv1000(machine_config &config)
/* D65010G031 - Video & sound chip */
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_raw(17897725/4, 288, 0, 224, 262, 0, 244);
// Pixel aspect is 48/35.
// Display aspect is MAME's 4:3 default.
// Note that this value is overridden by the user's pv1000.cfg, if present.
// 206px x 48/35(PAR) / 4/3(DAR) = 212sl
m_screen->set_default_position(216/206.0,0, //216 px in storage aspect; cropped to 206 px
244/212.0,0); //244 sl in storage aspect; cropped to 212 sl
m_screen->set_screen_update(FUNC(pv1000_state::screen_update_pv1000));
m_screen->set_palette(m_palette);
@ -500,7 +513,7 @@ void pv1000_state::pv1000(machine_config &config)
ROM_START( pv1000 )
ROM_REGION( 0x4000, "gfxrom", ROMREGION_ERASE00 )
ROM_REGION( 0x8000, "gfxrom", ROMREGION_ERASE00 )
ROM_REGION( 0x400, "gfxram", ROMREGION_ERASE00 )
ROM_END