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tv912.cpp: Add flashing or steady cursor (nw)

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This commit is contained in:
AJR 2018-01-22 18:10:37 -05:00
parent f75f27b929
commit fd8a0c0407
1 changed files with 17 additions and 5 deletions
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22
src/mame/drivers/tv912.cpp
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@ -138,6 +138,7 @@ private:
emu_timer *m_baudgen_timer;
bool m_force_blank;
bool m_4hz_flasher;
bool m_lpt_select;
u8 m_keyboard_scan;
std::unique_ptr<u8[]> m_dispram;
@ -172,6 +173,7 @@ WRITE8_MEMBER(tv912_state::p2_w)
m_bankdev->set_bank(data & 0x0f);
// P24: +4Hz Flasher
m_4hz_flasher = BIT(data, 4);
}
READ8_MEMBER(tv912_state::crtc_r)
@ -276,7 +278,7 @@ void tv912_state::device_timer(emu_timer &timer, device_timer_id id, int param,
u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
{
if (m_crtc->screen_reset())
if (m_crtc->screen_reset() || m_force_blank)
{
bitmap.fill(rgb_t::black(), cliprect);
return 0;
@ -285,6 +287,9 @@ u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, cons
u8 *dispram = static_cast<u8 *>(m_dispram_bank->base());
ioport_value videoctrl = m_video_control->read();
rectangle curs;
m_crtc->cursor_bounds(curs);
for (int y = cliprect.top(); y <= cliprect.bottom(); y++)
{
int row = y / 10;
@ -302,18 +307,24 @@ u32 tv912_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, cons
ch = (pos & 0x1f) | (row & 7) << 5;
u8 data = (ra > 0 && ra < 9) ? charbase[(ch & 0x7f) << 3] : 0;
u8 dots = data >> 2;
u8 dots = (data & 0xfc) >> 1;
bool adv = BIT(data, 1);
for (int d = 0; d < 7; d++)
if (x == curs.left() && y >= curs.top() && y <= curs.bottom())
{
if (BIT(videoctrl, 0) || !m_4hz_flasher)
dots ^= 0xff;
}
for (int d = 0; d < CHAR_WIDTH / 2; d++)
{
if (x >= cliprect.left() && x <= cliprect.right())
bitmap.pix(y, x) = BIT(dots, 6) ? rgb_t::white() : rgb_t::black();
bitmap.pix(y, x) = BIT(dots, 7) ? rgb_t::white() : rgb_t::black();
x++;
if (adv)
dots <<= 1;
if (x >= cliprect.left() && x <= cliprect.right())
bitmap.pix(y, x) = BIT(dots, 6) ? rgb_t::white() : rgb_t::black();
bitmap.pix(y, x) = BIT(dots, 7) ? rgb_t::white() : rgb_t::black();
x++;
if (!adv)
dots <<= 1;
@ -337,6 +348,7 @@ void tv912_state::machine_start()
save_item(NAME(m_force_blank));
save_item(NAME(m_lpt_select));
save_item(NAME(m_4hz_flasher));
save_item(NAME(m_keyboard_scan));
save_pointer(NAME(m_dispram.get()), 0x1000);
}