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sinclair/sprinter.cpp: 312/320 lines video modes (#12699)

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Co-authored-by: Nigel Barnes <ngbarnes@gmail.com>
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holub 2024-09-02 07:16:21 -04:00 committed by GitHub
parent 4ef4b1e1dd
commit c898392580
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1 changed files with 27 additions and 9 deletions
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36
src/mame/sinclair/sprinter.cpp
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@ -122,6 +122,7 @@ protected:
void update_memory();
void update_cpu();
void update_video(bool is312);
virtual TIMER_CALLBACK_MEMBER(irq_on) override;
virtual TIMER_CALLBACK_MEMBER(irq_off) override;
@ -357,6 +358,13 @@ void sprinter_state::update_cpu()
m_maincpu->set_clock_scale((m_turbo && m_turbo_hard) ? 6 : 1); // 1 - 21MHz, 0 - 3.5MHz
}
void sprinter_state::update_video(bool is312)
{
const u16 vtotal = SPRINT_HEIGHT - (8 * is312);
m_screen->configure(SPRINT_WIDTH, vtotal, m_screen->visible_area(), HZ_TO_ATTOSECONDS(X_SP / 3) * SPRINT_WIDTH * vtotal);
update_int(true);
}
u32 sprinter_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
if (m_conf)
@ -372,7 +380,8 @@ void sprinter_state::screen_update_graph(screen_device &screen, bitmap_ind16 &bi
const bool flash = BIT(screen.frame_number(), 4);
for (u16 vpos = cliprect.top(); vpos <= cliprect.bottom();)
{
const u16 b8 = (SPRINT_HEIGHT + vpos - SPRINT_BORDER_TOP - m_hold.second) % SPRINT_HEIGHT;
const u16 scr_height = screen.height();
const u16 b8 = (scr_height + vpos - SPRINT_BORDER_TOP - m_hold.second) % scr_height;
for (u16 hpos = cliprect.left(); hpos <= cliprect.right();)
{
const u16 a16 = (SPRINT_WIDTH + hpos - SPRINT_BORDER_LEFT - m_hold.first) % SPRINT_WIDTH;
@ -405,8 +414,8 @@ void sprinter_state::draw_tile(u8* mode, bitmap_ind16 &bitmap, const rectangle &
{
for (auto dx = cliprect.left(); dx <= cliprect.right(); dx++)
{
const u8 color = m_vram[(y + ((dy & 7) >> lowres)) * 1024 + x + ((dx & 15) >> (1 + lowres))];
*pix++ = pal + (BIT(mode[0], 5) ? color : ((dx & 1) ? (color & 0x0f) : (color >> 4)));
const u8 color = m_vram[(y + (((dy - m_hold.second) & 7) >> lowres)) * 1024 + x + (((dx - m_hold.first) & 15) >> (1 + lowres))];
*pix++ = pal + (BIT(mode[0], 5) ? color : (((dx - m_hold.first) & 1) ? (color & 0x0f) : (color >> 4)));
}
pix += SPRINT_WIDTH - cliprect.width();
}
@ -463,7 +472,8 @@ void sprinter_state::screen_update_game(screen_device &screen, bitmap_ind16 &bit
{
for (u16 vpos = cliprect.top(); vpos <= cliprect.bottom(); vpos++)
{
const u8 b = ((SPRINT_HEIGHT + vpos - SPRINT_BORDER_TOP - m_hold.second) % SPRINT_HEIGHT) >> 3;
const u16 scr_height = screen.height();
const u8 b = ((scr_height + vpos - SPRINT_BORDER_TOP - m_hold.second) % scr_height) >> 3;
const u8 a = ((SPRINT_WIDTH + cliprect.left() - SPRINT_BORDER_LEFT - m_hold.first) % SPRINT_WIDTH) >> 4;
std::pair<u8, u8> scroll = lookback_scroll(a, b);
@ -480,7 +490,7 @@ void sprinter_state::screen_update_game(screen_device &screen, bitmap_ind16 &bit
scroll = {mode[3] & 0x0f, mode[3] >> 4};
a16 = (SPRINT_WIDTH + hpos + (scroll.first << 1) - SPRINT_BORDER_LEFT - m_hold.first) % SPRINT_WIDTH;
}
const u16 b8 = (SPRINT_HEIGHT + vpos + scroll.second - SPRINT_BORDER_TOP - m_hold.second) % SPRINT_HEIGHT;
const u16 b8 = (scr_height + vpos + scroll.second - SPRINT_BORDER_TOP - m_hold.second) % scr_height;
if (mode == nullptr)
{
@ -730,6 +740,10 @@ void sprinter_state::dcp_w(offs_t offset, u8 data)
case 0x2b: // HDD2 - primary
m_ata_selected = 0;
break;
case 0x2c: // 320
case 0x2d: // 312
update_video(dcpp & 1);
break;
case 0x2e:
if (m_conf)
machine().schedule_hard_reset();
@ -1164,12 +1178,13 @@ void sprinter_state::update_int(bool recalculate)
if (recalculate)
m_ints.clear();
const u8 height = m_screen->height() / 8;
if (m_ints.empty())
{
for (auto scr_b = 0; scr_b <= 39; scr_b++)
for (auto scr_b = 0; scr_b < height; scr_b++)
{
bool pre_int = false;
const u8 b = (scr_b + 40 - 2) % 40; // 2-top border
const u8 b = (scr_b + height - 2) % height; // 2-top border
for (auto scr_a = 0; scr_a <= 55; scr_a++)
{
const u8 a = (scr_a + 56 - 6) % 56; // 3-left border, 3-teared blank?
@ -1414,7 +1429,10 @@ void sprinter_state::machine_reset()
m_bank_view3.disable();
}
else
{
update_memory();
update_video(0);
}
}
void sprinter_state::device_post_load()
@ -1547,7 +1565,7 @@ TIMER_CALLBACK_MEMBER(sprinter_state::irq_on)
TIMER_CALLBACK_MEMBER(sprinter_state::irq_off)
{
m_irq_off_timer->adjust(attotime::never); // in case it's called from INT Ack, not by timer itself
m_irq_off_timer->reset(); // in case it's called from INT Ack, not by timer itself
m_hold_irq = 0;
m_maincpu->set_input_line(INPUT_LINE_IRQ0, CLEAR_LINE);
}
@ -1568,7 +1586,7 @@ TIMER_CALLBACK_MEMBER(sprinter_state::cbl_tick)
{
m_hold_irq = 1;
m_maincpu->set_input_line(INPUT_LINE_IRQ0, ASSERT_LINE);
m_irq_off_timer->adjust(attotime::never);
m_irq_off_timer->reset();
}
}