void invaders_videoram_w (int offset,int data)
{
if (invaders_videoram[offset] != data)
{
int i,x,y;
int col;
invaders_videoram[offset] = data;
y = offset / 32;
x = 8 * (offset % 32);
/* Calculate overlay color for this byte */
col = Machine->pens[WHITE];
if (x >= 16 && x < 72) col = Machine->pens[GREEN];
if (x < 16 && y > 16 && y < 134) col = Machine->pens[GREEN];
if (x >= 192 && x < 224) col = Machine->pens[RED];
for (i = 0; i < 8; i++)
{
if (!(data & 0x01))
plot_pixel_8080 (x, y, Machine->pens[BLACK]);
else
plot_pixel_8080 (x, y, col);
x ++;
data >>= 1;
}
}
static void phantom2_vh_screenrefresh(struct osd_bitmap *bitmap,int full_refresh)
{
unsigned char *clouds;
int x, y;
/* update the bitmap */
vh_screenrefresh(bitmap, full_refresh);
/* draw the clouds */
clouds = memory_region(REGION_PROMS);
for (y = 0; y < 128; y++)
{
unsigned char *offs = &memory_region(REGION_PROMS)[y * 0x10];
for (x = 0; x < 128; x++)
{
if (offs[x >> 3] & (1 << (x & 0x07)))
{
plot_pixel_8080(x*2, y*2, 1);
plot_pixel_8080(x*2+1, y*2, 1);
plot_pixel_8080(x*2, y*2+1, 1);
plot_pixel_8080(x*2+1, y*2+1, 1);
}
}
}
}
void ramtek_videoram_w (int offset,int data)
{
data = data & ~mask;
if (ramtek_videoram[offset] != data)
{
int i,x,y;
ramtek_videoram[offset] = data;
y = offset / 32;
x = 8 * (offset % 32);
for (i = 0; i < 8; i++)
{
if (!(data & 0x80))
plot_pixel_8080 (x, y, Machine->pens[BLACK]);
else
plot_pixel_8080 (x, y, Machine->pens[WHITE]);
x ++;
data <<= 1;
}
}
}
static void draw_sight(int x_center, int y_center)
{
int x,y;
if (x_center<2) x_center=2;
if (x_center>253) x_center=253;
if (y_center<2) y_center=2;
if (y_center>253) y_center=253;
for(y = y_center-10; y < y_center+11; y++)
if((y >= 0) && (y < 256))
plot_pixel_8080(x_center,y,1);
for(x = x_center-20; x < x_center+21; x++)
if((x >= 0) && (x < 256))
plot_pixel_8080(x,y_center,1);
}
