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in207100: Get something on screen

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This commit is contained in:
Dirk Best 2020-09-18 13:08:31 +02:00
parent 963135db2a
commit ea81611ece
1 changed files with 35 additions and 4 deletions
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39
src/mame/drivers/informer_207_100.cpp
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@ -69,6 +69,7 @@ private:
void mem_map(address_map &map);
MC6845_ON_UPDATE_ADDR_CHANGED(crtc_addr);
MC6845_UPDATE_ROW(crtc_update_row);
};
@ -81,6 +82,10 @@ void informer_207_100_state::mem_map(address_map &map)
{
map(0x0000, 0x27ff).ram().share("ram");
map(0xc000, 0xffff).rom().region("maincpu", 0);
map(0xff00, 0xff0f).rw(m_duart, FUNC(scn2681_device::read), FUNC(scn2681_device::write));
map(0xff20, 0xff20).rw(m_crtc, FUNC(mc6845_device::status_r), FUNC(mc6845_device::address_w));
map(0xff21, 0xff21).rw(m_crtc, FUNC(mc6845_device::register_r), FUNC(mc6845_device::register_w));
map(0xff40, 0xff41).rw(m_acia, FUNC(acia6850_device::read), FUNC(acia6850_device::write));
}
@ -96,8 +101,34 @@ INPUT_PORTS_END
// VIDEO EMULATION
//**************************************************************************
MC6845_ON_UPDATE_ADDR_CHANGED( informer_207_100_state::crtc_addr )
{
// m_video_update_address = address;
}
MC6845_UPDATE_ROW( informer_207_100_state::crtc_update_row )
{
const pen_t *pen = m_palette->pens();
for (int x = 0; x < x_count; x++)
{
// uint8_t attr = m_ram[ma + x * 2 + 0];
uint8_t code = m_ram[ma + x * 2 + 1];
uint8_t data = m_chargen[(code << 4) + ra];
if (x == cursor_x)
data = 0xff;
// draw 8 pixels of the character
bitmap.pix32(y, x * 8 + 7) = pen[BIT(data, 0)];
bitmap.pix32(y, x * 8 + 6) = pen[BIT(data, 1)];
bitmap.pix32(y, x * 8 + 5) = pen[BIT(data, 2)];
bitmap.pix32(y, x * 8 + 4) = pen[BIT(data, 3)];
bitmap.pix32(y, x * 8 + 3) = pen[BIT(data, 4)];
bitmap.pix32(y, x * 8 + 2) = pen[BIT(data, 5)];
bitmap.pix32(y, x * 8 + 1) = pen[BIT(data, 6)];
bitmap.pix32(y, x * 8 + 0) = pen[BIT(data, 7)];
}
}
static const gfx_layout char_layout =
@ -126,6 +157,8 @@ void informer_207_100_state::machine_start()
void informer_207_100_state::machine_reset()
{
// start executing somewhere sane
m_maincpu->set_pc(0xc000);
}
@ -147,10 +180,7 @@ void informer_207_100_state::informer_207_100(machine_config &config)
// video
SCREEN(config, m_screen, SCREEN_TYPE_RASTER);
m_screen->set_color(rgb_t::green());
m_screen->set_size(640, 480);
m_screen->set_visarea_full();
m_screen->set_refresh_hz(60);
// m_screen->set_raw(19.7184_MHz_XTAL, 0, 0, 0, 0, 0, 0);
m_screen->set_raw(19.7184_MHz_XTAL, 832, 0, 640, 316, 0, 300);
m_screen->set_screen_update("crtc", FUNC(mc6845_device::screen_update));
PALETTE(config, m_palette, palette_device::MONOCHROME);
@ -161,6 +191,7 @@ void informer_207_100_state::informer_207_100(machine_config &config)
m_crtc->set_screen("screen");
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
m_crtc->set_on_update_addr_change_callback(FUNC(informer_207_100_state::crtc_addr));
m_crtc->set_update_row_callback(FUNC(informer_207_100_state::crtc_update_row));
}