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cit101: Add boldface and blinking/half intensity attributes

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This commit is contained in:
AJR 2018-05-09 19:01:36 -04:00
parent 47f41ad603
commit 55ce3880a5
1 changed files with 28 additions and 5 deletions
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33
src/mame/drivers/cit101.cpp
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@ -88,6 +88,7 @@ private:
DECLARE_READ8_MEMBER(e0_latch_r);
DECLARE_WRITE8_MEMBER(e0_latch_w);
DECLARE_WRITE_LINE_MEMBER(blink_w);
DECLARE_WRITE8_MEMBER(screen_control_w);
DECLARE_WRITE8_MEMBER(brightness_w);
@ -101,6 +102,8 @@ private:
u8 m_e0_latch;
bool m_blink;
required_device<cpu_device> m_maincpu;
required_device<screen_device> m_screen;
required_device<er2055_device> m_nvr;
@ -116,6 +119,7 @@ void cit101_state::machine_start()
subdevice<i8251_device>("kbduart")->write_cts(0);
save_item(NAME(m_e0_latch));
save_item(NAME(m_blink));
}
u32 cit101_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect)
@ -130,17 +134,27 @@ u32 cit101_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, con
const u16 rowattr = m_mainram[row * 2 + ptrbase] | m_extraram[row * 2 + ptrbase] << 8;
const int line = ((y % 10) / (BIT(rowattr, 8) ? 2 : 1) + (rowattr & 0x000f)) & 0xf;
// Character attribute bit 0: underline (also used to render cursor)
// Character attribute bit 1: reverse video (also used to render cursor)
// Character attribute bit 2: boldface
// Character attribute bit 3: blinking (half intensity)
int c = 0;
u8 attr = m_extraram[rowaddr];
u8 char_data = m_chargen[(m_mainram[rowaddr] << 4) | line];
if (line == 9 && BIT(attr, 0))
char_data ^= 0xff;
if (BIT(attr, 1))
char_data ^= 0xff;
rgb_t on_color = BIT(attr, 1) ? rgb_t::black() : rgb_t::white();
rgb_t off_color = BIT(attr, 1) ? rgb_t::white() : rgb_t::black();
if (BIT(attr, 3) && m_blink)
on_color = rgb_t(0xc0, 0xc0, 0xc0);
bool last_bit = false;
for (int x = screen.visible_area().left(); x <= screen.visible_area().right(); x++)
{
const bool cur_bit = BIT(char_data, 7);
if (x >= cliprect.left() && x <= cliprect.right())
bitmap.pix32(y, x) = BIT(char_data, 7) ? rgb_t::white() : rgb_t::black();
bitmap.pix32(y, x) = (cur_bit || (BIT(attr, 2) && last_bit)) ? on_color : off_color;
last_bit = cur_bit;
c++;
if (!BIT(rowattr, 9) || !BIT(c, 0))
@ -155,8 +169,11 @@ u32 cit101_state::screen_update(screen_device &screen, bitmap_rgb32 &bitmap, con
char_data = m_chargen[(m_mainram[rowaddr] << 4) | line];
if (line == 9 && BIT(attr, 0))
char_data ^= 0xff;
if (BIT(attr, 1))
char_data ^= 0xff;
on_color = BIT(attr, 1) ? rgb_t::black() : rgb_t::white();
off_color = BIT(attr, 1) ? rgb_t::white() : rgb_t::black();
if (BIT(attr, 3) && m_blink)
on_color = rgb_t(0xc0, 0xc0, 0xc0);
last_bit = false;
}
}
}
@ -189,6 +206,11 @@ WRITE8_MEMBER(cit101_state::e0_latch_w)
m_e0_latch = data;
}
WRITE_LINE_MEMBER(cit101_state::blink_w)
{
m_blink = state;
}
WRITE8_MEMBER(cit101_state::screen_control_w)
{
if ((m_extraram[0] & 0x06) != (data & 0x06))
@ -277,6 +299,7 @@ MACHINE_CONFIG_START(cit101_state::cit101)
MCFG_DEVICE_ADD("maincpu", I8085A, 6.144_MHz_XTAL)
MCFG_DEVICE_PROGRAM_MAP(mem_map)
MCFG_DEVICE_IO_MAP(io_map)
MCFG_I8085A_SOD(WRITELINE(*this, cit101_state, blink_w))
MCFG_SCREEN_ADD("screen", RASTER)
//MCFG_SCREEN_RAW_PARAMS(14.976_MHz_XTAL, 960, 0, 800, 260, 0, 240)