// license:BSD-3-Clause // copyright-holders:Krzysztof Strzecha /*************************************************************************** lviv.c Functions to emulate the video hardware of PK-01 Lviv. Krzysztof Strzecha ***************************************************************************/ #include "emu.h" #include "includes/lviv.h" const rgb_t lviv_state::s_palette[8] = { { 0x00, 0x00, 0x00 }, { 0x00, 0x00, 0xa4 }, { 0x00, 0xa4, 0x00 }, { 0x00, 0xa4, 0xa4 }, { 0xa4, 0x00, 0x00 }, { 0xa4, 0x00, 0xa4 }, { 0xa4, 0xa4, 0x00 }, { 0xa4, 0xa4, 0xa4 } }; void lviv_state::lviv_palette(palette_device &palette) const { palette.set_pen_colors(0, s_palette); } void lviv_state::update_palette(uint8_t pal) { m_colortable[0][0] = 0; m_colortable[0][1] = 0; m_colortable[0][2] = 0; m_colortable[0][3] = 0; m_colortable[0][0] |= (BIT(pal, 3) == BIT(pal, 4)) ? 0x04 : 0x00; m_colortable[0][0] |= BIT(pal, 5) ? 0x02 : 0x00; m_colortable[0][0] |= (BIT(pal, 2) == BIT(pal, 6)) ? 0x01 : 0x00; m_colortable[0][1] |= (BIT(pal, 0) == BIT(pal, 4)) ? 0x04 : 0x00; m_colortable[0][1] |= BIT(pal, 5) ? 0x02 : 0x00; m_colortable[0][1] |= BIT(pal, 6) ? 0x00 : 0x01; m_colortable[0][2] |= BIT(pal, 4) ? 0x04 : 0x00; m_colortable[0][2] |= BIT(pal, 5) ? 0x00 : 0x02; m_colortable[0][2] |= BIT(pal, 6) ? 0x01 : 0x00; m_colortable[0][3] |= BIT(pal, 4) ? 0x00 : 0x04; m_colortable[0][3] |= (BIT(pal, 1) == BIT(pal, 5)) ? 0x02 : 0x00; m_colortable[0][3] |= BIT(pal, 6) ? 0x01 : 0x00; } uint32_t lviv_state::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { for (int y = 0; y < 256; y++) { for (int x = 0; x < 256; x += 4) { const uint8_t data = m_video_ram[(y << 6) | (x >> 2)]; int pen = m_colortable[0][((data & 0x08) >> 3) | ((data & 0x80) >> (3+3))]; bitmap.pix16(y, x + 0) = pen; pen = m_colortable[0][((data & 0x04) >> 2) | ((data & 0x40) >> (2+3))]; bitmap.pix16(y, x + 1) = pen; pen = m_colortable[0][((data & 0x02) >> 1) | ((data & 0x20) >> (1+3))]; bitmap.pix16(y, x + 2) = pen; pen = m_colortable[0][((data & 0x01) >> 0) | ((data & 0x10) >> (0+3))]; bitmap.pix16(y, x + 3) = pen; } } return 0; }