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lb4: Screen raw parameters, fix some dividers

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This commit is contained in:
Dirk Best 2018-11-17 02:10:30 +01:00
parent 490cd1e886
commit 21318d7ed2
1 changed files with 14 additions and 18 deletions
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32
src/mame/drivers/lb4.cpp
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@ -76,21 +76,20 @@ void lb4_state::mem_map(address_map &map)
map(0xe000, 0xffff).rom().region("maincpu", 0);
}
// identical to esprit.cpp
MC6845_UPDATE_ROW(lb4_state::crtc_update_row)
{
const rgb_t *palette = m_palette->palette()->entry_list_raw();
u8 chr,gfx,inv;
u16 mem,x;
u32 *p = &bitmap.pix32(y);
uint32_t *p = &bitmap.pix32(y);
for (x = 0; x < x_count; x++)
for (int x = 0; x < x_count; x++)
{
mem = (ma + x) & 0x7ff;
chr = m_p_videoram[mem];
inv = ((x == cursor_x) ^ BIT(chr, 7)) ? 0xff : 0;
gfx = m_p_chargen[(chr<<4) | ra] ^ inv;
uint16_t mem = (ma + x) & 0x7ff;
uint8_t chr = m_p_videoram[mem];
uint16_t gfx = m_p_chargen[(chr<<4) | ra] ^ ((x == cursor_x) ? 0x1ff : 0);
/* Display a scanline of a character (8 pixels) */
/* Display a scanline of a character (9 pixels) */
*p++ = palette[BIT(gfx, 8)];
*p++ = palette[BIT(gfx, 7)];
*p++ = palette[BIT(gfx, 6)];
*p++ = palette[BIT(gfx, 5)];
@ -119,26 +118,22 @@ GFXDECODE_END
void lb4_state::lb4(machine_config &config)
{
// All dividers unknown/guessed
M6800(config, m_maincpu, MASTER_CLOCK / 16);
M6800(config, m_maincpu, MASTER_CLOCK / 18);
m_maincpu->set_addrmap(AS_PROGRAM, &lb4_state::mem_map);
/* video hardware */
screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER));
screen.set_color(rgb_t::green());
screen.set_refresh_hz(50);
screen.set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */
screen.set_size(640, 480);
screen.set_visarea(0, 640-1, 0, 480-1);
screen.set_raw(MASTER_CLOCK, 882, 9, 729, 315, 0, 300); // 80x25
screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update));
PALETTE(config, m_palette, 2).set_init("palette", FUNC(palette_device::palette_init_monochrome));
GFXDECODE(config, m_gfxdecode, m_palette, chars);
H46505(config, m_crtc, MASTER_CLOCK / 10);
H46505(config, m_crtc, MASTER_CLOCK / 9);
m_crtc->set_screen("screen");
m_crtc->set_show_border_area(false);
m_crtc->set_char_width(8);
m_crtc->set_char_width(9);
m_crtc->set_update_row_callback(FUNC(lb4_state::crtc_update_row), this);
m_crtc->out_vsync_callback().set_inputline(m_maincpu, M6800_IRQ_LINE);
@ -151,8 +146,9 @@ void lb4_state::lb4(machine_config &config)
rs232.rxd_handler().set(m_acia, FUNC(acia6850_device::write_rxd));
rs232.cts_handler().set(m_acia, FUNC(acia6850_device::write_cts));
Z80CTC(config, m_ctc, MASTER_CLOCK / 4);
Z80CTC(config, m_ctc, MASTER_CLOCK / 4); // divider?
m_ctc->set_clk<0>(MASTER_CLOCK / 18);
m_ctc->set_clk<1>(MASTER_CLOCK / 18);
m_ctc->zc_callback<0>().set(m_acia, FUNC(acia6850_device::write_txc));
m_ctc->zc_callback<0>().append(m_acia, FUNC(acia6850_device::write_rxc));
}