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// license:BSD-3-Clause
// copyright-holders:Miodrag Milanovic
/***************************************************************************
Bashkiria-2M video driver by Miodrag Milanovic
28/03/2008 Preliminary driver.
****************************************************************************/
#include "emu.h"
#include "includes/b2m.h"
#include "machine/ram.h"
void b2m_state::video_start()
{
}
uint32_t b2m_state::screen_update_b2m(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
uint8_t code1;
uint8_t code2;
uint8_t col;
int y, x, b;
uint8_t *ram = m_ram->pointer();
for (x = 0; x < 48; x++)
{
for (y = 0; y < 256; y++)
{
if (m_b2m_video_page==0) {
code1 = ram[0x11000 + x*256 + ((y + m_b2m_video_scroll) & 0xff)];
code2 = ram[0x15000 + x*256 + ((y + m_b2m_video_scroll) & 0xff)];
} else {
code1 = ram[0x19000 + x*256 + ((y + m_b2m_video_scroll) & 0xff)];
code2 = ram[0x1d000 + x*256 + ((y + m_b2m_video_scroll) & 0xff)];
}
for (b = 7; b >= 0; b--)
{
col = (((code2 >> b) & 0x01)<<1) + ((code1 >> b) & 0x01);
bitmap.pix16(y, x*8+b) = col;
}
}
}
return 0;
}
void b2m_state::b2m_palette(palette_device &palette) const
{
static constexpr rgb_t b2m_pens[4] = {
{ 0x00, 0x00, 0x00 }, // 0
{ 0x00, 0x00, 0x00 }, // 1
{ 0x00, 0x00, 0x00 }, // 2
{ 0x00, 0x00, 0x00 }, // 3
};
palette.set_pen_colors(0, b2m_pens);
}
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