/***************************************************************************
video.c
Functions to emulate the video hardware of the machine.
***************************************************************************/
#include "emu.h"
#include "includes/8080bw.h"
#define NUM_PENS (8)
MACHINE_START( extra_8080bw_vh )
{
_8080bw_state *state = machine.driver_data<_8080bw_state>();
state->save_item(NAME(state->m_c8080bw_flip_screen));
state->save_item(NAME(state->m_color_map));
state->save_item(NAME(state->m_screen_red));
// These two only belong to schaser, but for simplicity's sake let's waste
// two bytes in other drivers' .sta files.
state->save_item(NAME(state->m_schaser_background_disable));
state->save_item(NAME(state->m_schaser_background_select));
}
static void invadpt2_get_pens( pen_t *pens )
{
offs_t i;
for (i = 0; i < NUM_PENS; i++)
{
pens[i] = MAKE_RGB(pal1bit(i >> 0), pal1bit(i >> 2), pal1bit(i >> 1));
}
}
static void sflush_get_pens( pen_t *pens )
{
offs_t i;
pens[0] = MAKE_RGB(0x80, 0x80, 0xff);
for (i = 1; i < NUM_PENS; i++)
{
pens[i] = MAKE_RGB(pal1bit(i >> 0), pal1bit(i >> 2), pal1bit(i >> 1));
}
}
static void cosmo_get_pens( pen_t *pens )
{
offs_t i;
for (i = 0; i < NUM_PENS; i++)
{
pens[i] = MAKE_RGB(pal1bit(i >> 0), pal1bit(i >> 1), pal1bit(i >> 2));
}
}
INLINE void set_pixel( running_machine &machine, bitmap_t *bitmap, UINT8 y, UINT8 x, pen_t *pens, UINT8 color )
{
_8080bw_state *state = machine.driver_data<_8080bw_state>();
if (y >= MW8080BW_VCOUNTER_START_NO_VBLANK)
{
if (state->m_c8080bw_flip_screen)
*BITMAP_ADDR32(bitmap, MW8080BW_VBSTART - 1 - (y - MW8080BW_VCOUNTER_START_NO_VBLANK), MW8080BW_HPIXCOUNT - 1 - x) = pens[color];
else
*BITMAP_ADDR32(bitmap, y - MW8080BW_VCOUNTER_START_NO_VBLANK, x) = pens[color];
}
}
INLINE void set_8_pixels( running_machine &machine, bitmap_t *bitmap, UINT8 y, UINT8 x, UINT8 data, pen_t *pens, UINT8 fore_color, UINT8 back_color )
{
int i;
for (i = 0; i < 8; i++)
{
set_pixel(machine, bitmap, y, x, pens, (data & 0x01) ? fore_color : back_color);
x = x + 1;
data = data >> 1;
}
}
/* this is needed as this driver doesn't emulate the shift register like mw8080bw does */
static void clear_extra_columns( running_machine &machine, bitmap_t *bitmap, pen_t *pens, UINT8 color )
{
_8080bw_state *state = machine.driver_data<_8080bw_state>();
UINT8 x;
for (x = 0; x < 4; x++)
{
UINT8 y;
for (y = MW8080BW_VCOUNTER_START_NO_VBLANK; y != 0; y++)
{
if (state->m_c8080bw_flip_screen)
*BITMAP_ADDR32(bitmap, MW8080BW_VBSTART - 1 - (y - MW8080BW_VCOUNTER_START_NO_VBLANK), MW8080BW_HPIXCOUNT - 1 - (256 + x)) = pens[color];
else
*BITMAP_ADDR32(bitmap, y - MW8080BW_VCOUNTER_START_NO_VBLANK, 256 + x) = pens[color];
}
}
}
SCREEN_UPDATE( invadpt2 )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
UINT8 *prom;
UINT8 *color_map_base;
invadpt2_get_pens(pens);
prom = screen->machine().region("proms")->base();
color_map_base = state->m_color_map ? &prom[0x0400] : &prom[0x0000];
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
offs_t color_address = (offs >> 8 << 5) | (offs & 0x1f);
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_screen_red ? 1 : color_map_base[color_address] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( ballbomb )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
UINT8 *color_map_base;
UINT8 *prom;
invadpt2_get_pens(pens);
prom = screen->machine().region("proms")->base();
color_map_base = state->m_color_map ? &prom[0x0400] : &prom[0x0000];
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
offs_t color_address = (offs >> 8 << 5) | (offs & 0x1f);
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_screen_red ? 1 : color_map_base[color_address] & 0x07;
/* blue background */
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 2);
}
clear_extra_columns(screen->machine(), bitmap, pens, 2);
return 0;
}
SCREEN_UPDATE( schaser )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
UINT8 *background_map_base;
invadpt2_get_pens(pens);
background_map_base = screen->machine().region("proms")->base();
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 back_color = 0;
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_colorram[offs & 0x1f9f] & 0x07;
if (!state->m_schaser_background_disable)
{
offs_t back_address = (offs >> 8 << 5) | (offs & 0x1f);
UINT8 back_data = background_map_base[back_address];
/* the equations derived from the schematics don't appear to produce
the right colors, but this one does, at least for this PROM */
back_color = (((back_data & 0x0c) == 0x0c) && state->m_schaser_background_select) ? 4 : 2;
}
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, back_color);
}
clear_extra_columns(screen->machine(), bitmap, pens, state->m_schaser_background_disable ? 0 : 2);
return 0;
}
SCREEN_UPDATE( schasercv )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
invadpt2_get_pens(pens);
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_colorram[offs & 0x1f9f] & 0x07;
/* blue background */
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 2);
}
clear_extra_columns(screen->machine(), bitmap, pens, 2);
return 0;
}
SCREEN_UPDATE( rollingc )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
invadpt2_get_pens(pens);
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_colorram[offs & 0x1f1f] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( polaris )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
UINT8 *color_map_base;
UINT8 *cloud_gfx;
invadpt2_get_pens(pens);
color_map_base = screen->machine().region("proms")->base();
cloud_gfx = screen->machine().region("user1")->base();
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
offs_t color_address = (offs >> 8 << 5) | (offs & 0x1f);
/* for the background color, bit 0 of the map PROM is connected to green gun.
red is 0 and blue is 1, giving cyan and blue for the background. This
is different from what the schematics shows, but it's supported
by screenshots. Bit 3 is connected to cloud enable, while
bits 1 and 2 are marked 'not use' (sic) */
UINT8 back_color = (color_map_base[color_address] & 0x01) ? 6 : 2;
UINT8 fore_color = ~state->m_colorram[offs & 0x1f9f] & 0x07;
UINT8 cloud_y = y - state->m_polaris_cloud_pos;
if ((color_map_base[color_address] & 0x08) || (cloud_y >= 64))
{
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, back_color);
}
else
{
/* cloud appears in this part of the screen */
int i;
for (i = 0; i < 8; i++)
{
UINT8 color;
if (data & 0x01)
{
color = fore_color;
}
else
{
int bit = 1 << (~x & 0x03);
offs_t cloud_gfx_offs = ((x >> 2) & 0x03) | ((~cloud_y & 0x3f) << 2);
color = (cloud_gfx[cloud_gfx_offs] & bit) ? 7 : back_color;
}
set_pixel(screen->machine(), bitmap, y, x, pens, color);
x = x + 1;
data = data >> 1;
}
}
}
clear_extra_columns(screen->machine(), bitmap, pens, 6);
return 0;
}
SCREEN_UPDATE( lupin3 )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
invadpt2_get_pens(pens);
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = ~state->m_colorram[offs & 0x1f9f] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( cosmo )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
cosmo_get_pens(pens);
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
offs_t color_address = (offs >> 8 << 5) | (offs & 0x1f);
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_colorram[color_address] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( indianbt )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
UINT8 *color_map_base;
UINT8 *prom;
cosmo_get_pens(pens);
prom = screen->machine().region("proms")->base();
color_map_base = state->m_color_map ? &prom[0x0400] : &prom[0x0000];
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
offs_t color_address = (offs >> 8 << 5) | (offs & 0x1f);
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = color_map_base[color_address] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( shuttlei )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[2] = { RGB_BLACK, RGB_WHITE };
offs_t offs;
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
int i;
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
for (i = 0; i < 8; i++)
{
pen_t pen = (data & 0x80) ? RGB_WHITE : RGB_BLACK;
*BITMAP_ADDR32(bitmap, y, x) = pen;
x = x + 1;
data = data << 1;
}
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}
SCREEN_UPDATE( sflush )
{
_8080bw_state *state = screen->machine().driver_data<_8080bw_state>();
pen_t pens[NUM_PENS];
offs_t offs;
sflush_get_pens(pens);
for (offs = 0; offs < state->m_main_ram_size; offs++)
{
UINT8 y = offs >> 5;
UINT8 x = offs << 3;
UINT8 data = state->m_main_ram[offs];
UINT8 fore_color = state->m_colorram[offs & 0x1f9f] & 0x07;
set_8_pixels(screen->machine(), bitmap, y, x, data, pens, fore_color, 0);
}
clear_extra_columns(screen->machine(), bitmap, pens, 0);
return 0;
}