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cit101: Add brightness control (nw)

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This commit is contained in:
AJR 2018-05-16 02:33:10 -04:00
parent 8e768ae25e
commit 3bad31a73a
1 changed files with 12 additions and 6 deletions
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18
src/mame/drivers/cit101.cpp
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@ -104,6 +104,7 @@ private:
u8 m_e0_latch; u8 m_e0_latch;
bool m_blink; bool m_blink;
u8 m_brightness;
required_device<cpu_device> m_maincpu; required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen; required_device<screen_device> m_screen;
@ -119,8 +120,11 @@ void cit101_state::machine_start()
subdevice<i8251_device>("comuart")->write_cts(0); subdevice<i8251_device>("comuart")->write_cts(0);
subdevice<i8251_device>("kbduart")->write_cts(0); subdevice<i8251_device>("kbduart")->write_cts(0);
m_brightness = 0xff;
save_item(NAME(m_e0_latch)); save_item(NAME(m_e0_latch));
save_item(NAME(m_blink)); save_item(NAME(m_blink));
save_item(NAME(m_brightness));
} }
@ -137,10 +141,10 @@ void cit101_state::draw_line(uint32_t *pixptr, int minx, int maxx, int line, boo
u8 char_data = m_chargen[(m_mainram[rowaddr] << 4) | line]; u8 char_data = m_chargen[(m_mainram[rowaddr] << 4) | line];
if (last_line && BIT(attr, 0)) if (last_line && BIT(attr, 0))
char_data ^= 0xff; char_data ^= 0xff;
rgb_t on_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t::black() : rgb_t::white(); rgb_t on_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t::black() : rgb_t(m_brightness, m_brightness, m_brightness);
rgb_t off_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t::white() : rgb_t::black(); rgb_t off_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t(m_brightness, m_brightness, m_brightness) : rgb_t::black();
if (BIT(attr, 3) && m_blink) if (BIT(attr, 3) && m_blink)
on_color = rgb_t(0xc0, 0xc0, 0xc0); on_color = rgb_t(m_brightness * 0.75, m_brightness * 0.75, m_brightness * 0.75);
bool last_bit = false; bool last_bit = false;
for (int x = 0; x <= maxx; x++) for (int x = 0; x <= maxx; x++)
{ {
@ -162,10 +166,10 @@ void cit101_state::draw_line(uint32_t *pixptr, int minx, int maxx, int line, boo
char_data = m_chargen[(m_mainram[rowaddr] << 4) | line]; char_data = m_chargen[(m_mainram[rowaddr] << 4) | line];
if (last_line && BIT(attr, 0)) if (last_line && BIT(attr, 0))
char_data ^= 0xff; char_data ^= 0xff;
on_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t::black() : rgb_t::white(); on_color = BIT(attr, 1) ? rgb_t::black() : rgb_t(m_brightness, m_brightness, m_brightness);
off_color = (BIT(attr, 1) != BIT(scrattr, 0)) ? rgb_t::white() : rgb_t::black(); off_color = BIT(attr, 1) ? rgb_t(m_brightness, m_brightness, m_brightness) : rgb_t::black();
if (BIT(attr, 3) && m_blink) if (BIT(attr, 3) && m_blink)
on_color = rgb_t(0xc0, 0xc0, 0xc0); on_color = rgb_t(m_brightness * 0.75, m_brightness * 0.75, m_brightness * 0.75);
last_bit = false; last_bit = false;
} }
} }
@ -266,6 +270,8 @@ WRITE8_MEMBER(cit101_state::screen_control_w)
WRITE8_MEMBER(cit101_state::brightness_w) WRITE8_MEMBER(cit101_state::brightness_w)
{ {
// Function of upper 3 bits is unknown
m_brightness = pal5bit(~data & 0x1f);
} }
WRITE8_MEMBER(cit101_state::nvr_address_w) WRITE8_MEMBER(cit101_state::nvr_address_w)