diff options
Diffstat (limited to 'src/devices/video/dp8350.cpp')
-rw-r--r-- | src/devices/video/dp8350.cpp | 136 |
1 files changed, 116 insertions, 20 deletions
diff --git a/src/devices/video/dp8350.cpp b/src/devices/video/dp8350.cpp index 7fbb1dd5978..74bdb7653b2 100644 --- a/src/devices/video/dp8350.cpp +++ b/src/devices/video/dp8350.cpp @@ -72,20 +72,15 @@ dp835x_device::dp835x_device(const machine_config &mconfig, device_type type, co , m_hsync_active(hsync_active) , m_vsync_active(vsync_active) , m_vblank_active(vblank_active) + , m_hsync_callback(*this) + , m_vsync_callback(*this) , m_vblank_callback(*this) , m_60hz_refresh(true) { - // many parameters are not used yet - (void)m_vsync_delay; - (void)m_vsync_width; - (void)m_hsync_delay; - (void)m_hsync_width; - (void)m_vblank_stop; + // some parameters are not used yet (void)m_cursor_on_all_lines; (void)m_lbc_0_width; (void)m_hsync_serration; - (void)m_hsync_active; - (void)m_vsync_active; } @@ -150,8 +145,8 @@ void dp835x_device::device_config_complete() void dp835x_device::device_resolve_objects() { - //m_hsync_callback.resolve_safe(); - //m_vsync_callback.resolve_safe(); + m_hsync_callback.resolve_safe(); + m_vsync_callback.resolve_safe(); m_vblank_callback.resolve_safe(); } @@ -162,8 +157,15 @@ void dp835x_device::device_resolve_objects() void dp835x_device::device_start() { - screen().register_vblank_callback(vblank_state_delegate(&dp835x_device::screen_vblank, this)); - + // create timers + m_hsync_on_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::hsync_update), this)); + m_hsync_off_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::hsync_update), this)); + m_vsync_on_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::vsync_update), this)); + m_vsync_off_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::vsync_update), this)); + m_vblank_on_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::vblank_update), this)); + m_vblank_off_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(dp835x_device::vblank_update), this)); + + // save state save_item(NAME(m_60hz_refresh)); } @@ -197,25 +199,67 @@ void dp835x_device::reconfigure_screen() int dots_per_line = m_char_width * m_chars_per_line; int dots_per_row = m_char_width * m_chars_per_row; int lines_per_frame = m_char_height * m_rows_per_frame + m_vblank_interval[m_60hz_refresh ? 1 : 0]; - attoseconds_t refresh = clocks_to_attotime(lines_per_frame * dots_per_line).as_attoseconds(); + attotime refresh = clocks_to_attotime(lines_per_frame * dots_per_line); if (m_half_shift) { rectangle visarea(0, 2 * dots_per_row - 1, 0, m_char_height * m_rows_per_frame - 1); - screen().configure(2 * dots_per_line, lines_per_frame, visarea, refresh); + screen().configure(2 * dots_per_line, lines_per_frame, visarea, refresh.as_attoseconds()); } else { rectangle visarea(0, dots_per_row - 1, 0, m_char_height * m_rows_per_frame - 1); - screen().configure(dots_per_line, lines_per_frame, visarea, refresh); + screen().configure(dots_per_line, lines_per_frame, visarea, refresh.as_attoseconds()); } logerror("Frame rate refresh: %.2f Hz (f%d); horizontal rate scan: %.4f kHz; character rate: %.4f MHz; dot rate: %.5f MHz\n", - ATTOSECONDS_TO_HZ(refresh), + ATTOSECONDS_TO_HZ(refresh.as_attoseconds()), m_60hz_refresh ? 1 : 0, clock() / (dots_per_line * 1000.0), clock() / (m_char_width * 1000000.0), clock() / 1000000.0); + + // get current screen position + int hpos = screen().hpos(); + int vpos = screen().vpos(); + + // set horizontal sync timers + int hsync_begin = (dots_per_row + m_char_width * m_hsync_delay) * (m_half_shift ? 2 : 1); + int hsync_end = hsync_begin + m_char_width * m_hsync_width * (m_half_shift ? 2 : 1); + if (hpos > hsync_begin) + hsync_begin += dots_per_line * (m_half_shift ? 2 : 1); + m_hsync_on_timer->adjust(clocks_to_attotime(hsync_begin - hpos) / (m_half_shift ? 2 : 1), m_hsync_active, clocks_to_attotime(dots_per_line)); + if (hpos > hsync_end) + hsync_end += dots_per_line * (m_half_shift ? 2 : 1); + m_hsync_off_timer->adjust(clocks_to_attotime(hsync_end - hpos) / (m_half_shift ? 2 : 1), !m_hsync_active, clocks_to_attotime(dots_per_line)); + + // calculate vertical sync and blanking parameters + int hblank_begin = dots_per_row * (m_half_shift ? 2 : 1); + int vblank_begin = m_char_height * m_rows_per_frame - 1; + int vsync_begin = vblank_begin + m_vsync_delay[m_60hz_refresh ? 1 : 0]; + int vsync_end = vsync_begin + m_vsync_width[m_60hz_refresh ? 1 : 0]; + int vblank_end = lines_per_frame - m_vblank_stop - 1; + logerror("vblank_begin: %d; vsync_begin: %d; vsync_end: %d; vblank_end: %d; vpos: %d\n", vblank_begin, vsync_begin, vsync_end, vblank_end, vpos); + if (hpos > hblank_begin) + { + hblank_begin += dots_per_line * (m_half_shift ? 2 : 1); + vpos++; + } + attotime until_hblank = clocks_to_attotime(hblank_begin - hpos) / (m_half_shift ? 2 : 1); + + // set vertical sync and blanking timers + if (vpos > vsync_begin) + vsync_begin += lines_per_frame; + m_vsync_on_timer->adjust(clocks_to_attotime((vsync_begin - vpos) * dots_per_line) + until_hblank, m_vsync_active, refresh); + if (vpos > vsync_end) + vsync_end += lines_per_frame; + m_vsync_off_timer->adjust(clocks_to_attotime((vsync_end - vpos) * dots_per_line) + until_hblank, !m_vsync_active, refresh); + if (vpos > vblank_begin) + vblank_begin += lines_per_frame; + m_vblank_on_timer->adjust(clocks_to_attotime((vblank_begin - vpos) * dots_per_line) + until_hblank, m_vblank_active, refresh); + if (vpos > vblank_end) + vblank_end += lines_per_frame; + m_vblank_off_timer->adjust(clocks_to_attotime((vblank_end - vpos) * dots_per_line) + until_hblank, !m_vblank_active, refresh); } @@ -270,20 +314,72 @@ void dp835x_device::register_load(u8 rs, u16 addr) //------------------------------------------------- +// hsync_r - report horizontal sync state +//------------------------------------------------- + +READ_LINE_MEMBER(dp835x_device::hsync_r) +{ + if (m_hsync_on_timer->remaining() > m_hsync_off_timer->remaining()) + return m_hsync_active; + else + return !m_hsync_active; +} + + +//------------------------------------------------- +// vblank_r - report vertical sync state +//------------------------------------------------- + +READ_LINE_MEMBER(dp835x_device::vsync_r) +{ + if (m_vsync_on_timer->remaining() > m_vsync_off_timer->remaining()) + return m_vsync_active; + else + return !m_vsync_active; +} + + +//------------------------------------------------- // vblank_r - report vertical blanking state //------------------------------------------------- READ_LINE_MEMBER(dp835x_device::vblank_r) { - return bool(screen().vblank()) == m_vblank_active; + if (m_vblank_on_timer->remaining() > m_vblank_off_timer->remaining()) + return m_vblank_active; + else + return !m_vblank_active; +} + + +//------------------------------------------------- +// hsync_update - update state of horizontal +// sync output +//------------------------------------------------- + +TIMER_CALLBACK_MEMBER(dp835x_device::hsync_update) +{ + m_hsync_callback(param); +} + + +//------------------------------------------------- +// vsync_update - update state of vertical +// sync output +//------------------------------------------------- + +TIMER_CALLBACK_MEMBER(dp835x_device::vsync_update) +{ + m_vsync_callback(param); } //------------------------------------------------- -// screen_vblank - vertical blanking handler +// vblank_update - update state of vertical +// blanking output //------------------------------------------------- -void dp835x_device::screen_vblank(screen_device &screen, bool state) +TIMER_CALLBACK_MEMBER(dp835x_device::vblank_update) { - m_vblank_callback(state == m_vblank_active); + m_vblank_callback(param); } |